Convert.ToUInt64とは何？わかりやすく解説 Weblio辞書

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.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

Convert.ToUInt64 メソッド (Object)

指定した Object の値を 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Object _
) As ULong

Visual Basic (使用法)

Dim value As Object
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    Object value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    Object^ value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    Object value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : Object
) : ulong

パラメータ

value: IConvertible インターフェイスを実装する Object か、または null 参照 (Visual Basic では Nothing)。

戻り値
value の値と等価な 64 ビット符号なし整数。value が null 参照 (Visual Basic では Nothing) の場合は 0。

例外

例外の種類	条件
InvalidCastException	value が IConvertible を実装していません。

解説

戻り値は、value の基になる型の IConvertible.ToUInt64 メソッドを呼び出した結果得られる値です。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Double)

指定した倍精度浮動小数点数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Double _
) As ULong

Visual Basic (使用法)

Dim value As Double
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    double value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    double value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    double value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : double
) : ulong

パラメータ

value: 倍精度浮動小数点数。

戻り値
近似値の 64 ビット符号なし整数に丸められた value。value が 2 つの整数の中間にある場合は、偶数が返されます。たとえば、4.5 は 4 に変換され、5.5 は 6 に変換されます。

例外

例外の種類	条件
OverflowException	value が 0 未満の値か、UInt64.MaxValue より大きい値です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間
Double
System.Math.Round

Convert.ToUInt64 メソッド (Boolean)

指定したブール値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Boolean _
) As ULong

Visual Basic (使用法)

Dim value As Boolean
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    bool value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    bool value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    boolean value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : boolean
) : ulong

パラメータ

value: ブール値。

戻り値
value が true の場合は数値の 1。それ以外の場合は 0。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (UInt32)

指定した 32 ビット符号なし整数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As UInteger _
) As ULong

Visual Basic (使用法)

Dim value As UInteger
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    uint value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    unsigned int value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    UInt32 value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : uint
) : ulong

パラメータ

value: 32 ビット符号なし整数。

戻り値
value と等価な 64 ビット符号なし整数。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (String)

指定した String 形式の数値を、それと等価な 64 ビット符号付き整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As String _
) As ULong

Visual Basic (使用法)

Dim value As String
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    string value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    String^ value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    String value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : String
) : ulong

パラメータ

value: 変換する数値を格納している String。

戻り値
value の値と等価な 64 ビット符号付き整数。または value が null 参照 (Visual Basic では Nothing) の場合は 0。

例外

例外の種類	条件
FormatException	value の構成が、省略可能な符号と、それに続く 0 から 9 までの一連の数字ではありません。
OverflowException	value が MinValue 未満の数値か、MaxValue より大きい数値を表しています。

解説

戻り値は、value に対して Int64.Parse メソッドを呼び出した結果得られる値です。

使用例

既定の書式設定を使用して、ToUInt64 メソッドで String 形式の 64 ビット符号なし整数を変換するコード例を次に示します。

Visual Basic

' Example of the Convert.ToUInt64( String ) and 
' Convert.ToUInt64( String, IFormatProvider ) methods.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic

Module ToUInt64ProviderDemo

    Dim format As String
 = "{0,-24}{1,-22}{2}"

    ' Get the exception type name; remove the namespace prefix.
    Function GetExceptionType( ex As Exception
 ) As String

        Dim exceptionType   As String
 = ex.GetType( ).ToString( )
        Return exceptionType.Substring( _
            exceptionType.LastIndexOf( "."c ) + 1
 )
    End Function

    Sub ConvertToUInt64( numericStr As String,
 _
        provider As IFormatProvider )

        Dim defaultValue    As Object
        Dim providerValue   As Object

        ' Convert numericStr to UInt64 without a format provider.
        Try
            defaultValue = Convert.ToUInt64( numericStr )
        Catch ex As Exception
            defaultValue = GetExceptionType( ex )
        End Try

        ' Convert numericStr to UInt64 with a format provider.
        Try
            providerValue = Convert.ToUInt64( numericStr, provider )
        Catch ex As Exception
            providerValue = GetExceptionType( ex )
        End Try

        Console.WriteLine( format, numericStr, _
            defaultValue, providerValue )
    End Sub

    Sub Main( )

        ' Create a NumberFormatInfo object and set several of its
        ' properties that apply to numbers.
        Dim provider  As NumberFormatInfo =
 new NumberFormatInfo( )

        ' These properties affect the conversion.
        provider.PositiveSign = "pos "
        provider.NegativeSign = "neg "

        ' These properties do not affect the conversion.
        ' The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = "."
        provider.NumberGroupSeparator = ","
        provider.NumberGroupSizes = New Integer(
 ) { 3 }

        Console.WriteLine( "This example of" &
 vbCrLf & _
            "  Convert.ToUInt64( String ) and " &
 vbCrLf & _
            "  Convert.ToUInt64( String, IFormatProvider ) "
 & _
            vbCrLf & "generates the following output. It "
 & _
            "converts several strings to unsigned "
 & vbCrLf & _
            "Long values, using default formatting "
 & _
            "or a NumberFormatInfo object." &
 vbCrLf )
        Console.WriteLine( format, "String to convert",
 _
            "Default/exception", "Provider/exception"
 )
        Console.WriteLine( format, "-----------------",
 _
            "-----------------", "------------------"
 )

        ' Convert strings, with and without an IFormatProvider.
        ConvertToUInt64( "123456789012", provider
 )
        ConvertToUInt64( "+123456789012", provider
 )
        ConvertToUInt64( "pos 123456789012", provider
 )
        ConvertToUInt64( "123456789012.", provider
 )
        ConvertToUInt64( "123,456,789,012", provider
 )
        ConvertToUInt64( "18446744073709551615", provider
 )
        ConvertToUInt64( "18446744073709551616", provider
 )
        ConvertToUInt64( "-1", provider )
    End Sub 
End Module 

' This example of
'   Convert.ToUInt64( String ) and
'   Convert.ToUInt64( String, IFormatProvider )
' generates the following output. It converts several strings to unsigned
' Long values, using default formatting or a NumberFormatInfo object.
' 
' String to convert       Default/exception     Provider/exception
' -----------------       -----------------     ------------------
' 123456789012            123456789012          123456789012
' +123456789012           123456789012          FormatException
' pos 123456789012        FormatException       123456789012
' 123456789012.           FormatException       FormatException
' 123,456,789,012         FormatException       FormatException
' 18446744073709551615    18446744073709551615  18446744073709551615
' 18446744073709551616    OverflowException     OverflowException
' -1                      OverflowException     FormatException

// Example of the Convert.ToUInt64( string ) and 
// Convert.ToUInt64( string, IFormatProvider ) methods.
using System;
using System.Globalization;

class ToUInt64ProviderDemo
{
    static string format = "{0,-24}{1
,-22}{2}";

     // Get the exception type name; remove the namespace prefix.
    static string GetExceptionType( Exception
 ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring( 
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    static void ConvertToUInt64( string
 numericStr, 
        IFormatProvider provider )
    {
        object defaultValue;
        object providerValue;

        // Convert numericStr to UInt64 without a format provider.
        try
        {
            defaultValue = Convert.ToUInt64( numericStr );
        }
        catch( Exception ex )
        {
            defaultValue = GetExceptionType( ex );
        }

        // Convert numericStr to UInt64 with a format provider.
        try
        {
            providerValue = Convert.ToUInt64( numericStr, provider );
        }
        catch( Exception ex )
        {
            providerValue = GetExceptionType( ex );
        }

        Console.WriteLine( format, numericStr, 
            defaultValue, providerValue );
    }

    public static void Main(
 )
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.NegativeSign = "neg ";
        provider.PositiveSign = "pos ";

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = ".";
        provider.NumberGroupSeparator = ",";
        provider.NumberGroupSizes = new int[
 ] { 3 };

        Console.WriteLine("This example of\n" +
            "  Convert.ToUInt64( string ) and \n" +
            "  Convert.ToUInt64( string, IFormatProvider
 ) " +
            "\ngenerates the following output. It converts " +
            "several strings to \nulong values, using "
 +
            "default formatting or a NumberFormatInfo object.\n"
 );
        Console.WriteLine( format, "String to convert", 
            "Default/exception", "Provider/exception" );
        Console.WriteLine( format, "-----------------", 
            "-----------------", "------------------" );

        // Convert strings, with and without an IFormatProvider.
        ConvertToUInt64( "123456789012", provider );
        ConvertToUInt64( "+123456789012", provider );
        ConvertToUInt64( "pos 123456789012", provider );
        ConvertToUInt64( "123456789012.", provider );
        ConvertToUInt64( "123,456,789,012", provider );
        ConvertToUInt64( "18446744073709551615", provider );
        ConvertToUInt64( "18446744073709551616", provider );
        ConvertToUInt64( "-1", provider );
    }
}

/*
This example of
  Convert.ToUInt64( string ) and
  Convert.ToUInt64( string, IFormatProvider )
generates the following output. It converts several strings to
ulong values, using default formatting or a
 NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

C++

// Example of the Convert::ToUInt64( String* ) and 
// Convert::ToUInt64( String*, IFormatProvider* ) methods.
using namespace System;
using namespace System::Globalization;
const __wchar_t * protoFmt = L"{0,-24}{1,-22}{2}";

// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
   String^ exceptionType = ex->GetType()->ToString();
   return exceptionType->Substring( exceptionType->LastIndexOf(
 '.' ) + 1 );
}

void ConvertToUInt64( String^ numericStr, IFormatProvider^ provider
 )
{
   Object^ defaultValue;
   Object^ providerValue;
   
   // Convert numericStr to UInt64 without a format provider.
   try
   {
      defaultValue = Convert::ToUInt64( numericStr );
   }
   catch ( Exception^ ex ) 
   {
      defaultValue = GetExceptionType( ex );
   }

   
   // Convert numericStr to UInt64 with a format provider.
   try
   {
      providerValue = Convert::ToUInt64( numericStr, provider );
   }
   catch ( Exception^ ex ) 
   {
      providerValue = GetExceptionType( ex );
   }

   Console::WriteLine( gcnew String( protoFmt ), numericStr, defaultValue, providerValue
 );
}

int main()
{
   
   // Create a NumberFormatInfo object and set several of its
   // properties that apply to numbers.
   NumberFormatInfo^ provider = gcnew NumberFormatInfo;
   
   // These properties affect the conversion.
   provider->NegativeSign = "neg ";
   provider->PositiveSign = "pos ";
   
   // These properties do not affect the conversion.
   // The input string cannot have decimal and group separators.
   provider->NumberDecimalSeparator = ".";
   provider->NumberGroupSeparator = ",";
   array<Int32>^sizes = {3};
   provider->NumberGroupSizes = sizes;
   Console::WriteLine( "This example of\n"
   "  Convert::ToUInt64( String* ) and \n"
   "  Convert::ToUInt64( String*, IFormatProvider* ) "
   "\ngenerates the following output. It converts "
   "several strings to unsigned \n__int64 values, using "
   "default formatting or a NumberFormatInfo object.\n"
 );
   Console::WriteLine( gcnew String( protoFmt ), "String to convert", "Default/exception",
 "Provider/exception" );
   Console::WriteLine( gcnew String( protoFmt ), "-----------------", "-----------------",
 "------------------" );
   
   // Convert strings, with and without an IFormatProvider.
   ConvertToUInt64( "123456789012", provider );
   ConvertToUInt64( "+123456789012", provider );
   ConvertToUInt64( "pos 123456789012", provider );
   ConvertToUInt64( "123456789012.", provider );
   ConvertToUInt64( "123,456,789,012", provider );
   ConvertToUInt64( "18446744073709551615", provider );
   ConvertToUInt64( "18446744073709551616", provider );
   ConvertToUInt64( "-1", provider );
}

/*
This example of
  Convert::ToUInt64( String* ) and
  Convert::ToUInt64( String*, IFormatProvider* )
generates the following output. It converts several strings to unsigned
__int64 values, using default formatting or
 a NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

// Example of the Convert.ToUInt64( string ) and 
// Convert.ToUInt64( string, IFormatProvider ) methods.
import System.* ;
import System.Globalization.* ;

class ToUInt64ProviderDemo
{
    private static String format = "{0,-24}{1,-22}{2}";
   
   
    // Get the exception type name; remove the namespace prefix.
    static String GetExceptionType(System.Exception ex)
    {
        String exceptionType = ex.GetType().ToString();
        return exceptionType.Substring((exceptionType.LastIndexOf('.')
 + 1));
    } //GetExceptionType   
   
    static void ConvertToUInt64(String numericStr,
 IFormatProvider provider)
    {
        Object defaultValue;
        Object providerValue;

        // Convert numericStr to UInt64 without a format provider.
        try    {
            defaultValue = Convert.ToUInt64(numericStr);
        }
        catch (System.Exception ex)    {
            defaultValue = GetExceptionType(ex);
        }

        // Convert numericStr to UInt64 with a format provider.
        try    {
            providerValue = Convert.ToUInt64(numericStr, provider);
        }
        catch (System.Exception ex)    {
            providerValue = GetExceptionType(ex);
        }
        Console.WriteLine(format, numericStr, defaultValue, providerValue);
    } //ConvertToUInt64

    public static void main(String[]
 args)
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.set_NegativeSign("neg ");
        provider.set_PositiveSign("pos ");

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.set_NumberDecimalSeparator(".");
        provider.set_NumberGroupSeparator(",");
        provider.set_NumberGroupSizes(new int[]
 { 3 });
        Console.WriteLine(("This example of\n" 
            + "  Convert.ToUInt64( string ) and \n"
            + "  Convert.ToUInt64( string, IFormatProvider
 ) " 
            + "\ngenerates the following output. It converts " 
            + "several strings to \nulong values, using "
 
            + "default formatting or a NumberFormatInfo object.\n"));
        Console.WriteLine(format, "String to convert", "Default/exception"
,
            "Provider/exception");
        Console.WriteLine(format, "-----------------", "-----------------"
,
            "------------------");

        // Convert strings, with and without an IFormatProvider.
        ConvertToUInt64("123456789012", provider);
        ConvertToUInt64("+123456789012", provider);
        ConvertToUInt64("pos 123456789012", provider);
        ConvertToUInt64("123456789012.", provider);
        ConvertToUInt64("123,456,789,012", provider);
        ConvertToUInt64("18446744073709551615", provider);
        ConvertToUInt64("18446744073709551616", provider);
        ConvertToUInt64("-1", provider);
    } //main
} //ToUInt64ProviderDemo

/*
This example of
  Convert.ToUInt64( string ) and
  Convert.ToUInt64( string, IFormatProvider )
generates the following output. It converts several strings to
ulong values, using default formatting or a
 NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (SByte)

指定した 64 ビット符号付き整数の値を等価の 8 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As SByte _
) As ULong

Visual Basic (使用法)

Dim value As SByte
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    sbyte value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    signed char value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    SByte value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : sbyte
) : ulong

パラメータ

value: 8 ビット符号付き整数。

戻り値
value の値と等価な 64 ビット符号なし整数。

例外

例外の種類	条件
OverflowException	value が 0 未満です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (UInt16)

指定した 16 ビット符号なし整数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As UShort _
) As ULong

Visual Basic (使用法)

Dim value As UShort
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    ushort value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    unsigned short value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    UInt16 value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : ushort
) : ulong

パラメータ

value: 16 ビット符号なし整数。

戻り値
value の値と等価な 64 ビット符号なし整数。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Int64)

指定した 64 ビット符号付き整数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Long _
) As ULong

Visual Basic (使用法)

Dim value As Long
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    long value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    long long value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    long value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : long
) : ulong

パラメータ

value: 64 ビット符号付き整数。

戻り値
value の値と等価な 64 ビット符号なし整数。

例外

例外の種類	条件
OverflowException	value が 0 未満です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Object, IFormatProvider)

カルチャに固有の指定した書式情報を使用して、指定した Object の値を 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Object, _
    provider As IFormatProvider _
) As ULong

Visual Basic (使用法)

Dim value As Object
Dim provider As IFormatProvider
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value, provider)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    Object value,
    IFormatProvider provider
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    Object^ value, 
    IFormatProvider^ provider
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    Object value, 
    IFormatProvider provider
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : Object, 
    provider : IFormatProvider
) : ulong

パラメータ

value: IConvertible インターフェイスを実装する Object。

provider: カルチャに固有の書式情報を提供する IFormatProvider インターフェイス実装。

戻り値
value の値と等価な 64 ビット符号なし整数。value が null 参照 (Visual Basic では Nothing) の場合は 0。

解説

戻り値は、value の基になる型の IConvertible.ToUInt64 メソッドを呼び出した結果得られる値です。

provider を使用すると、value の内容について、カルチャに固有の変換情報を指定できます。たとえば、value が数値を表す String の場合、provider によって、その数値の表記方法に関するカルチャに固有の情報を提供できます。

基本型では provider は無視されますが、value が IConvertible インターフェイスを実装するユーザー定義型の場合は有効となります。

使用例

IConvertible を実装するクラスと IFormatProvider を実装するクラスを定義するコード例を次に示します。IConvertible を実装するクラスのオブジェクトは、Double 値の配列を保持します。各クラスのオブジェクトは ToUInt64 メソッドに渡されます。このメソッドは、Double 値の配列の平均値を返します。IFormatProvider を実装するオブジェクトを使用して平均値の算出方法が決定されます。

Visual Basic

' Example of the Convert.ToXXX( Object, IFormatProvider ) methods.
Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Module IConvertibleProviderDemo

    ' Define the types of averaging available in the class 
    ' implementing IConvertible.
    Enum AverageType as Short
        None = 0
        GeometricMean = 1
        ArithmeticMean = 2
        Median = 3
    End Enum

    ' Pass an instance of this class to methods that require an 
    ' IFormatProvider. The class instance determines the type of 
    ' average to calculate.
    Public Class AverageInfo
        Implements IFormatProvider

        Protected  AvgType      As AverageType

        ' Specify the type of averaging in the constructor.
        Public Sub New(
 avgType As AverageType )
            Me.AvgType = avgType
        End Sub

        ' This method returns a reference to the containing object 
        ' if an object of AverageInfo type is requested. 
        Public Function GetFormat( argType
 As Type ) As Object _
            Implements IFormatProvider.GetFormat

            If argType Is GetType(
 AverageInfo ) Then
                Return Me
            Else
                Return Nothing
            End If
        End Function 

        ' Use this property to set or get the type of averaging.
        Public Property TypeOfAverage( ) As
 AverageType
            Get
                Return Me.AvgType
            End Get
            Set( ByVal value as
 AverageType )
                Me.AvgType = value
            End Set
        End Property
    End Class 

    ' This class encapsulates an array of Double values and implements
 
    ' the IConvertible interface. Most of the IConvertible methods 
    ' return an average of the array elements in one of three types:
 
    ' arithmetic mean, geometric mean, or median. 
    Public Class DataSet
        Implements IConvertible

        Protected data              As ArrayList
        Protected defaultProvider   As AverageInfo
           
        ' Construct the object and add an initial list of values.
        ' Create a default format provider.
        Public Sub New(
 ParamArray values( ) As Double
 )
            data = New ArrayList( values )
            defaultProvider = New AverageInfo( _
                AverageType.ArithmeticMean )  
        End Sub
           
        ' Add additional values with this method.
        Public Function Add( value As
 Double ) As Integer
            data.Add( value )
            Return data.Count
        End Function
           
        ' Get, set, and add values with this indexer property.
        Default Public Property
 Item(index As Integer) As
 Double
            Get
                If index >= 0 AndAlso index
 < data.Count Then
                    Return System.Convert.ToDouble( data( index
 ) )
                Else
                    Throw New InvalidOperationException(
 _
                        "[DataSet.get] Index out of range."
 )
                End If
            End Get
            Set
                If index >= 0 AndAlso index
 < data.Count Then
                    data( index ) = value
                 
                ElseIf index = data.Count Then
                    data.Add( value )
                Else
                    Throw New InvalidOperationException(
 _
                        "[DataSet.set] Index out of range."
 )
                End If
            End Set
        End Property
          
        ' This property returns the number of elements in the object.
        Public ReadOnly Property
 Count( ) As Integer
            Get
                Return data.Count
            End Get
        End Property

        ' This method calculates the average of the object's elements.
        Protected Function Average( ByVal
 avgType As AverageType ) As Double

            Dim SumProd As Double
 
            Dim Index   As Integer

            If data.Count = 0 Then Return
 0.0

            Select Case avgType
                
                Case AverageType.GeometricMean

                    SumProd = 1.0
                    For Index = 0 To data.Count
 - 1
                        SumProd *= data( Index )
                    Next Index
                    
                    ' This calculation will not fail with negative 
                    ' elements.
                    Return Math.Sign( SumProd ) * Math.Pow( _
                        Math.Abs( SumProd ), 1.0 / data.Count )

                Case AverageType.ArithmeticMean

                    SumProd = 0.0
                    For Index = 0 To data.Count
 - 1
                        SumProd += data( Index )
                    Next Index

                    Return SumProd / data.Count 

                Case AverageType.Median

                    If data.Count Mod 2 = 0
 Then
                        Return ( data( data.Count \ 2 ) + _
                            data( data.Count \ 2 - 1 ) ) / 2.0
                    Else
                        Return data( data.Count \ 2 ) 
                    End If
            End Select
        End Function

        ' Get the AverageInfo object from the caller's format 
        ' provider, or use the local default.
        Protected Function GetAverageInfo(
 _
            provider As IFormatProvider ) As
 AverageInfo

            Dim avgInfo As AverageInfo = Nothing

            If Not provider Is
 Nothing Then
                avgInfo = provider.GetFormat( GetType( AverageInfo
 ) )
            End If

            Return IIf( avgInfo Is Nothing,
 defaultProvider, avgInfo )
            
        End Function           

        ' Calculate the average and limit the range.
        Protected Function CalcNLimitAverage(
 min As Double, _
            max As Double, provider as
 IFormatProvider ) As Double

            ' Get the format provider and calculate the average.
            Dim avgInfo As AverageInfo = GetAverageInfo(
 provider )
            Dim avg As Double
 = Average( avgInfo.TypeOfAverage )

            ' Limit the range, based on the minimum and maximum values
 
            ' for the type.
            Return IIf( avg > max, max, IIf( avg < min,
 min, avg ) )

        End Function

        ' The following elements are required by IConvertible.

        ' None of these conversion functions throw exceptions. When
        ' the data is out of range for the type, the appropriate
        ' MinValue or MaxValue is used.
        Public Function GetTypeCode( ) As
 TypeCode _
            Implements IConvertible.GetTypeCode
            Return TypeCode.Object
        End Function

        Function ToBoolean( ByVal provider
 As IFormatProvider ) As _
            Boolean Implements IConvertible.ToBoolean

            ' ToBoolean is false if the dataset is empty.
            If data.Count <= 0 Then
                Return False

            ' For median averaging, ToBoolean is true if any 
            ' non-discarded elements are nonzero.
            ElseIf AverageType.Median = _
                GetAverageInfo( provider ).TypeOfAverage Then

                If data.Count Mod 2 = 0 Then
                    Return ( data( data.Count \ 2 ) <> 0.0
 Or _
                        data( data.Count \ 2 - 1 ) <> 0.0 )
                Else
                    Return data( data.Count \ 2 ) <> 0.0
                End If

            ' For arithmetic or geometric mean averaging, ToBoolean
 is 
            ' true if any element of the dataset is nonzero.  
            Else
                Dim Index As Integer
                For Index = 0 To data.Count
 - 1
                    If data( Index ) <> 0.0 Then
 Return True
                Next Index
                Return False
            End If
        End Function

        Function ToByte( ByVal provider As
 IFormatProvider ) As Byte _
            Implements IConvertible.ToByte
            Return Convert.ToByte( CalcNLimitAverage( _
                Byte.MinValue, Byte.MaxValue,
 provider ) )
        End Function

        Function ToChar( ByVal provider As
 IFormatProvider ) As Char _
            Implements IConvertible.ToChar
            Return Convert.ToChar( Convert.ToUInt16( _
                CalcNLimitAverage( 0.0, &HFFFF, provider ) ) )
        End Function

        ' Convert to DateTime by adding the calculated average as 
        ' seconds to the current date and time. A valid DateTime is
 
        ' always returned.
        Function ToDateTime( ByVal provider
 As IFormatProvider ) As _
            DateTime Implements IConvertible.ToDateTime
            Dim seconds As Double
 = Average( _
                GetAverageInfo( provider ).TypeOfAverage )
            Try
                Return DateTime.Now.AddSeconds( seconds )
            Catch ex As ArgumentOutOfRangeException
 
                Return IIf( seconds < 0.0, DateTime.MinValue,
 _
                    DateTime.MaxValue )
            End Try
        End Function

        Function ToDecimal( ByVal provider
 As IFormatProvider ) As _
            Decimal Implements IConvertible.ToDecimal

            ' The Double conversion rounds Decimal.MinValue and
            ' Decimal.MaxValue to invalid Decimal values, so the 
            ' following limits must be used.
            Return Convert.ToDecimal( CalcNLimitAverage( _
                -79228162514264330000000000000.0, _
                79228162514264330000000000000.0, provider ) )
        End Function

        Function ToDouble( ByVal provider As
 IFormatProvider) As _
            Double Implements IConvertible.ToDouble
            Return Average( GetAverageInfo( provider ).TypeOfAverage
 )
        End Function

        Function ToInt16( ByVal provider As
 IFormatProvider ) As _
            Short Implements IConvertible.ToInt16
            Return Convert.ToInt16( CalcNLimitAverage( _
                Int16.MinValue, Int16.MaxValue, provider ) )
        End Function

        Function ToInt32( ByVal provider As
 IFormatProvider ) As _
            Integer Implements IConvertible.ToInt32
            Return Convert.ToInt32( CalcNLimitAverage( _
                Int32.MinValue, Int32.MaxValue, provider ) )
        End Function

        Function ToInt64( ByVal provider As
 IFormatProvider ) As Long _
            Implements IConvertible.ToInt64

            ' The Double conversion rounds Int64.MinValue and 
            ' Int64.MaxValue to invalid Long values, so the following
 
            ' limits must be used.
            Return Convert.ToInt64( CalcNLimitAverage( _
                -9223372036854775000, 9223372036854775000, provider ) )
        End Function

        Function ToSByte( ByVal provider As
 IFormatProvider ) As _
            SByte Implements IConvertible.ToSByte

            ' SByte.MinValue and SByte.MaxValue are not defined in
            ' Visual Basic.
            Return Convert.ToSByte( CalcNLimitAverage( _
                -128, 127, provider ) )
        End Function

        Function ToSingle( ByVal provider As
 IFormatProvider ) As _
            Single Implements IConvertible.ToSingle
            Return Convert.ToSingle( CalcNLimitAverage( _
                Single.MinValue, Single.MaxValue,
 provider ) )
        End Function

        Function ToUInt16( ByVal provider As
 IFormatProvider ) As _
            UInt16 Implements IConvertible.ToUInt16

            ' UInt16.MinValue and UInt16.MaxValue are not defined in
 
            ' Visual Basic.
            Return Convert.ToUInt16( CalcNLimitAverage( _
                0, &HFFFF, provider ) )
        End Function

        Function ToUInt32( ByVal provider As
 IFormatProvider ) As _
            UInt32 Implements IConvertible.ToUInt32

            ' UInt32.MinValue and UInt32.MaxValue are not defined in
 
            ' Visual Basic.
            Return Convert.ToUInt32( CalcNLimitAverage( _
                0, 4294967295, provider ) )
        End Function

        Function ToUInt64( ByVal provider As
 IFormatProvider ) As _
            UInt64 Implements IConvertible.ToUInt64

            ' UInt64.MinValue and UInt64.MaxValue are not defined in
 
            ' Visual Basic. The Double conversion would have rounded
 
            ' UInt64.MaxValue, so the following limit must be used.
            Return Convert.ToUInt64( CalcNLimitAverage( _
                0, 18446744073709550000.0, provider ) )
        End Function

        Function ToType( ByVal conversionType
 As Type, _
            ByVal provider As IFormatProvider)
 As Object _
            Implements IConvertible.ToType
            Return Convert.ChangeType( Average( GetAverageInfo(
 _
                provider ).TypeOfAverage ), conversionType )
        End Function

        Overloads Function ToString( ByVal
 provider As IFormatProvider _
            ) As String Implements
 IConvertible.ToString
            Dim avgType as AverageType = _
                GetAverageInfo( provider ).TypeOfAverage
            Return String.Format( "(
 {0}: {1:G10} )", avgType, _
                Average( avgType ) )
        End Function
    End Class
   
    ' Display a DataSet with three different format providers.
    Sub DisplayDataSet( ds As DataSet )

        Dim fmt    As String
      = "{0,-12}{1,20}{2,20}{3,20}"
        Dim median As AverageInfo = New
 AverageInfo( AverageType.Median )
        Dim geMean As AverageInfo = _
            New AverageInfo( AverageType.GeometricMean )
        Dim iX     As Integer

        ' Display the dataset elements.
        If ds.Count > 0 Then
            Console.Write( vbCrLf & "DataSet: [{0}",
 ds( 0 ) )
            For iX = 1 To ds.Count - 1
                Console.Write( ", {0}", ds( iX ) )
            Next iX
            Console.WriteLine( "]" & vbCrLf )
        End If

        Console.WriteLine( fmt, "Convert.", "Default",
 _
            "Geometric Mean", "Median"
 )
        Console.WriteLine( fmt, "--------", "-------",
 _
            "--------------", "------"
 )
        Console.WriteLine( fmt, "ToBoolean", _
            Convert.ToBoolean( ds, Nothing ), _
            Convert.ToBoolean( ds, geMean ), _
            Convert.ToBoolean( ds, median ) )
        Console.WriteLine( fmt, "ToByte", _
            Convert.ToByte( ds, Nothing ), _
            Convert.ToByte( ds, geMean ), _
            Convert.ToByte( ds, median ) )
        Console.WriteLine( fmt, "ToChar", _
            Convert.ToChar( ds, Nothing ), _
            Convert.ToChar( ds, geMean ), _
            Convert.ToChar( ds, median ) )
        Console.WriteLine( "{0,-12}{1,20:yyyy-MM-dd HH:mm:ss}"
 & _
            "{2,20:yyyy-MM-dd HH:mm:ss}{3,20:yyyy-MM-dd HH:mm:ss}",
 _
            "ToDateTime", Convert.ToDateTime( ds,
 Nothing ), _
            Convert.ToDateTime( ds, geMean ), _
            Convert.ToDateTime( ds, median ) )
        Console.WriteLine( fmt, "ToDecimal", _
            Convert.ToDecimal( ds, Nothing ), _
            Convert.ToDecimal( ds, geMean ), _
            Convert.ToDecimal( ds, median ) )
        Console.WriteLine( fmt, "ToDouble", _
            Convert.ToDouble( ds, Nothing ), _
            Convert.ToDouble( ds, geMean ), _
            Convert.ToDouble( ds, median ) )
        Console.WriteLine( fmt, "ToInt16", _
            Convert.ToInt16( ds, Nothing ), _
            Convert.ToInt16( ds, geMean ), _
            Convert.ToInt16( ds, median ) )
        Console.WriteLine( fmt, "ToInt32", _
            Convert.ToInt32( ds, Nothing ), _
            Convert.ToInt32( ds, geMean ), _
            Convert.ToInt32( ds, median ) )
        Console.WriteLine( fmt, "ToInt64", _
            Convert.ToInt64( ds, Nothing ), _
            Convert.ToInt64( ds, geMean ), _
            Convert.ToInt64( ds, median ) )
        Console.WriteLine( fmt, "ToSByte", _
            Convert.ToSByte( ds, Nothing ), _
            Convert.ToSByte( ds, geMean ), _
            Convert.ToSByte( ds, median ) )
        Console.WriteLine( fmt, "ToSingle", _
            Convert.ToSingle( ds, Nothing ), _
            Convert.ToSingle( ds, geMean ), _
            Convert.ToSingle( ds, median ) )
        Console.WriteLine( fmt, "ToUInt16", _
            Convert.ToUInt16( ds, Nothing ), _
            Convert.ToUInt16( ds, geMean ), _
            Convert.ToUInt16( ds, median ) )
        Console.WriteLine( fmt, "ToUInt32", _
            Convert.ToUInt32( ds, Nothing ), _
            Convert.ToUInt32( ds, geMean ), _
            Convert.ToUInt32( ds, median ) )
        Console.WriteLine( fmt, "ToUInt64", _
            Convert.ToUInt64( ds, Nothing ), _
            Convert.ToUInt64( ds, geMean ), _
            Convert.ToUInt64( ds, median ) )
    End Sub
   
    Sub Main( )
        Console.WriteLine( _
            "This example of the Convert.ToXXX( Object, "
 & _
            "IFormatProvider ) methods " & vbCrLf
 & "generates " & _
            "the following output. The example displays the "
 & _
            "values " & vbCrLf & "returned
 by the methods, " & _
            "using several IFormatProvider objects."
 & vbCrLf )
          
        Dim ds1 As New DataSet(
 10.5, 22.2, 45.9, 88.7, 156.05, 297.6 )
        DisplayDataSet( ds1 )
          
        Dim ds2 As New DataSet(
 _
            359999.95, 425000, 499999.5, 775000, 1695000 )
        DisplayDataSet( ds2 )
    End Sub 
End Module 

' This example of the Convert.ToXXX( Object, IFormatProvider ) methods
' generates the following output. The example displays the values
' returned by the methods, using several IFormatProvider objects.
' 
' DataSet: [10.5, 22.2, 45.9, 88.7, 156.05, 297.6]
' 
' Convert.                 Default      Geometric Mean             
 Median
' --------                 -------      --------------             
 ------
' ToBoolean                   True                True             
   True
' ToByte                       103                  59             
     67
' ToChar                         g                   ;             
      C
' ToDateTime   2003-05-13 14:52:53 2003-05-13 14:52:09 2003-05-13 14:52:17
' ToDecimal       103.491666666667    59.4332135445164             
   67.3
' ToDouble        103.491666666667    59.4332135445164             
   67.3
' ToInt16                      103                  59             
     67
' ToInt32                      103                  59             
     67
' ToInt64                      103                  59             
     67
' ToSByte                      103                  59             
     67
' ToSingle                103.4917            59.43321             
   67.3
' ToUInt16                     103                  59             
     67
' ToUInt32                     103                  59             
     67
' ToUInt64                     103                  59             
     67
' 
' DataSet: [359999.95, 425000, 499999.5, 775000, 1695000]
' 
' Convert.                 Default      Geometric Mean             
 Median
' --------                 -------      --------------             
 ------
' ToBoolean                   True                True             
   True
' ToByte                       255                 255             
    255
' ToChar                         ?                   ?             
      ?
' ToDateTime   2003-05-22 07:27:49 2003-05-20 22:17:27 2003-05-19 09:44:29
' ToDecimal              750999.89    631577.237188435            499999.5
' ToDouble               750999.89    631577.237188435            499999.5
' ToInt16                    32767               32767             
  32767
' ToInt32                   751000              631577             
 500000
' ToInt64                   751000              631577             
 500000
' ToSByte                      127                 127             
    127
' ToSingle                750999.9            631577.3            499999.5
' ToUInt16                   65535               65535             
  65535
' ToUInt32                  751000              631577             
 500000
' ToUInt64                  751000              631577             
 500000

// Example of the Convert.ToXXX( object, IFormatProvider ) methods.
using System;
using System.Collections;

// Define the types of averaging available in the class 
// implementing IConvertible.
public enum AverageType : short
{
    None = 0,
    GeometricMean = 1,
    ArithmeticMean = 2,
    Median = 3
};

// Pass an instance of this class to methods that require an 
// IFormatProvider. The class instance determines the type of 
// average to calculate.
public class AverageInfo : IFormatProvider
{
    protected AverageType AvgType;

    // Specify the type of averaging in the constructor.
    public AverageInfo( AverageType avgType )
    {
        this.AvgType = avgType;
    }

    // This method returns a reference to the containing object 
    // if an object of AverageInfo type is requested. 
    public object GetFormat( Type argType )
    {
        if ( argType == typeof( AverageInfo ) )
            return this;
        else
            return null;
    }

    // Use this property to set or get the type of averaging.
    public AverageType TypeOfAverage        
    {
        get { return this.AvgType;
 }
        set { this.AvgType = value; }
    }
}

// This class encapsulates an array of double values and implements
 
// the IConvertible interface. Most of the IConvertible methods 
// return an average of the array elements in one of three types: 
// arithmetic mean, geometric mean, or median. 
public class DataSet : IConvertible
{
    protected ArrayList     data;
    protected AverageInfo   defaultProvider;
        
    // Construct the object and add an initial list of values.
    // Create a default format provider.
    public DataSet( params double[ ] values )
    {
        data = new ArrayList( values );
        defaultProvider = 
            new AverageInfo( AverageType.ArithmeticMean );
    }
        
    // Add additional values with this method.
    public int Add( double value )
    {
        data.Add( value );
        return data.Count;
    }
        
    // Get, set, and add values with this indexer property.
    public double this[ int
 index ]        
    {
        get
        {
            if( index >= 0 && index < data.Count
 )
                return (double)data[ index ];
            else
                throw new InvalidOperationException(
                    "[DataSet.get] Index out of range."
 );
        }
        set
        {
            if( index >= 0 && index < data.Count
 )
                data[ index ] = value;

            else if( index == data.Count )
                data.Add( value );
            else
                throw new InvalidOperationException(
                    "[DataSet.set] Index out of range."
 );
        }
    }
        
    // This property returns the number of elements in the object.
    public int Count        
    {
        get { return data.Count; }
    }

    // This method calculates the average of the object's elements.
    protected double Average( AverageType avgType )
    {
        double  SumProd;

        if( data.Count == 0 ) 
            return 0.0;

        switch( avgType )
        {
            case AverageType.GeometricMean:

                SumProd = 1.0;
                for( int Index = 0; Index <
 data.Count; Index++ )
                    SumProd *= (double)data[ Index ];
                
                // This calculation will not fail with negative 
                // elements.
                return Math.Sign( SumProd ) * Math.Pow( 
                    Math.Abs( SumProd ), 1.0 / data.Count );

            case AverageType.ArithmeticMean:

                SumProd = 0.0;
                for( int Index = 0; Index <
 data.Count; Index++ )
                    SumProd += (double)data[ Index ];

                return SumProd / data.Count;

            case AverageType.Median:

                if( data.Count % 2 == 0 )
                    return ( (double)data[ data.Count / 2 ] +
 
                        (double)data[ data.Count / 2 - 1 ] ) / 2.0;
                else
                    return (double)data[ data.Count / 2 ];

            default:
                return 0.0;
        }
    }

    // Get the AverageInfo object from the caller's format provider
,
    // or use the local default.
    protected AverageInfo GetAverageInfo( IFormatProvider provider
 )
    {
        AverageInfo avgInfo = null;

        if( provider != null )
            avgInfo = (AverageInfo)provider.GetFormat( 
                typeof( AverageInfo ) );

        if ( avgInfo == null )
            return defaultProvider;
        else
            return avgInfo;
    }

    // Calculate the average and limit the range.
    protected double CalcNLimitAverage( double min, double max,
 
        IFormatProvider provider )
    {
        // Get the format provider and calculate the average.
        AverageInfo avgInfo = GetAverageInfo( provider );
        double avg = Average( avgInfo.TypeOfAverage );

        // Limit the range, based on the minimum and maximum values
 
        // for the type.
        return avg > max ? max : avg < min ? min : avg;

    }

    // The following elements are required by IConvertible.

    // None of these conversion functions throw exceptions. When
    // the data is out of range for the type, the appropriate
    // MinValue or MaxValue is used.
    public TypeCode GetTypeCode( )
    {
        return TypeCode.Object;
    }

    public bool ToBoolean( IFormatProvider
 provider )
    {
        // ToBoolean is false if the dataset is empty.
        if( data.Count <= 0 )
            return false;

        // For median averaging, ToBoolean is true if any 
        // non-discarded elements are nonzero.
        else if( AverageType.Median == 
            GetAverageInfo( provider ).TypeOfAverage )
        {
            if (data.Count % 2 == 0 )
                return ( (double)data[ data.Count / 2 ] != 0.0
 || 
                    (double)data[ data.Count / 2 - 1 ] != 0.0 );
            else
                return (double)data[ data.Count / 2 ] != 0.0;
        }

        // For arithmetic or geometric mean averaging, ToBoolean is
 
        // true if any element of the dataset is nonzero.  
        else
        {
            for( int Index = 0; Index <
 data.Count; Index++ )
                if( (double)data[ Index ] != 0.0 ) 
                    return true;
            return false;
        }
    }

    public byte ToByte( IFormatProvider provider )
    {
        return Convert.ToByte( CalcNLimitAverage( 
            Byte.MinValue, Byte.MaxValue, provider ) );
    }

    public char ToChar( IFormatProvider provider
 )
    {
        return Convert.ToChar( Convert.ToUInt16( CalcNLimitAverage(
 
            Char.MinValue, Char.MaxValue, provider ) ) );
    }

    // Convert to DateTime by adding the calculated average as 
    // seconds to the current date and time. A valid DateTime is 
    // always returned.
    public DateTime ToDateTime( IFormatProvider provider )
    {
        double seconds = 
            Average( GetAverageInfo( provider ).TypeOfAverage );
        try
        {
            return DateTime.Now.AddSeconds( seconds );
        }
        catch( ArgumentOutOfRangeException )
        {
            return seconds < 0.0 ? DateTime.MinValue : DateTime.MaxValue;
        }
    }

    public decimal ToDecimal( IFormatProvider provider )
    {
        // The Double conversion rounds Decimal.MinValue and 
        // Decimal.MaxValue to invalid Decimal values, so the 
        // following limits must be used.
        return Convert.ToDecimal( CalcNLimitAverage( 
            -79228162514264330000000000000.0, 
            79228162514264330000000000000.0, provider ) );
    }

    public double ToDouble( IFormatProvider provider )
    {
        return Average( GetAverageInfo(provider).TypeOfAverage
 );
    }

    public short ToInt16( IFormatProvider provider )
    {
        return Convert.ToInt16( CalcNLimitAverage( 
            Int16.MinValue, Int16.MaxValue, provider ) );
    }

    public int ToInt32( IFormatProvider provider
 )
    {
        return Convert.ToInt32( CalcNLimitAverage( 
            Int32.MinValue, Int32.MaxValue, provider ) );
    }

    public long ToInt64( IFormatProvider provider )
    {
        // The Double conversion rounds Int64.MinValue and 
        // Int64.MaxValue to invalid Int64 values, so the following
 
        // limits must be used.
        return Convert.ToInt64( CalcNLimitAverage( 
            -9223372036854775000, 9223372036854775000, provider ) );
    }

    public SByte ToSByte( IFormatProvider provider )
    {
        return Convert.ToSByte( CalcNLimitAverage( 
            SByte.MinValue, SByte.MaxValue, provider ) );
    }

    public float ToSingle( IFormatProvider
 provider )
    {
        return Convert.ToSingle( CalcNLimitAverage( 
            Single.MinValue, Single.MaxValue, provider ) );
    }

    public UInt16 ToUInt16( IFormatProvider provider )
    {
        return Convert.ToUInt16( CalcNLimitAverage( 
            UInt16.MinValue, UInt16.MaxValue, provider ) );
    }

    public UInt32 ToUInt32( IFormatProvider provider )
    {
        return Convert.ToUInt32( CalcNLimitAverage( 
            UInt32.MinValue, UInt32.MaxValue, provider ) );
    }

    public UInt64 ToUInt64( IFormatProvider provider )
    {
        // The Double conversion rounds UInt64.MaxValue to an invalid
        // UInt64 value, so the following limit must be used.
        return Convert.ToUInt64( CalcNLimitAverage( 
            0, 18446744073709550000.0, provider ) );
    }

    public object ToType( Type conversionType, 
        IFormatProvider provider )
    {
        return Convert.ChangeType( Average( 
            GetAverageInfo( provider ).TypeOfAverage ), 
            conversionType );
    }

    public string ToString( IFormatProvider
 provider )
    {
        AverageType avgType = GetAverageInfo( provider ).TypeOfAverage;
        return String.Format( "( {0}: {1:G10} )", avgType,
 
            Average( avgType ) );
    }
}
   
class IConvertibleProviderDemo
{
    // Display a DataSet with three different format providers.
    public static void DisplayDataSet(
 DataSet ds )
    {
        string      fmt    = "{0,-12}{1,20}{2,20}{3,20}";
        AverageInfo median = new AverageInfo( AverageType.Median
 );
        AverageInfo geMean = 
            new AverageInfo( AverageType.GeometricMean );

         // Display the dataset elements.
        if( ds.Count > 0 )
        {
            Console.Write( "\nDataSet: [{0}", ds[ 0 ] );
            for( int iX = 1; iX < ds.Count;
 iX++ )
                Console.Write( ", {0}", ds[ iX ] );
            Console.WriteLine( "]\n" );
        }

        Console.WriteLine( fmt, "Convert.", "Default", 
            "Geometric Mean", "Median");
        Console.WriteLine( fmt, "--------", "-------", 
            "--------------", "------");
        Console.WriteLine( fmt, "ToBoolean", 
            Convert.ToBoolean( ds, null ), 
            Convert.ToBoolean( ds, geMean ), 
            Convert.ToBoolean( ds, median ) );
        Console.WriteLine( fmt, "ToByte", 
            Convert.ToByte( ds, null ), 
            Convert.ToByte( ds, geMean ), 
            Convert.ToByte( ds, median ) );
        Console.WriteLine( fmt, "ToChar", 
            Convert.ToChar( ds, null ), 
            Convert.ToChar( ds, geMean ), 
            Convert.ToChar( ds, median ) );
        Console.WriteLine( "{0,-12}{1,20:yyyy-MM-dd HH:mm:ss}" +
            "{2,20:yyyy-MM-dd HH:mm:ss}{3,20:yyyy-MM-dd HH:mm:ss}", 
            "ToDateTime", Convert.ToDateTime( ds, null
 ), 
            Convert.ToDateTime( ds, geMean ), 
            Convert.ToDateTime( ds, median ) );
        Console.WriteLine( fmt, "ToDecimal", 
            Convert.ToDecimal( ds, null ), 
            Convert.ToDecimal( ds, geMean ), 
            Convert.ToDecimal( ds, median ) );
        Console.WriteLine( fmt, "ToDouble", 
            Convert.ToDouble( ds, null ), 
            Convert.ToDouble( ds, geMean ), 
            Convert.ToDouble( ds, median ) );
        Console.WriteLine( fmt, "ToInt16", 
            Convert.ToInt16( ds, null ), 
            Convert.ToInt16( ds, geMean ), 
            Convert.ToInt16( ds, median ) );
        Console.WriteLine( fmt, "ToInt32", 
            Convert.ToInt32( ds, null ), 
            Convert.ToInt32( ds, geMean ), 
            Convert.ToInt32( ds, median ) );
        Console.WriteLine( fmt, "ToInt64", 
            Convert.ToInt64( ds, null ), 
            Convert.ToInt64( ds, geMean ), 
            Convert.ToInt64( ds, median ) );
        Console.WriteLine( fmt, "ToSByte", 
            Convert.ToSByte( ds, null ), 
            Convert.ToSByte( ds, geMean ), 
            Convert.ToSByte( ds, median ) );
        Console.WriteLine( fmt, "ToSingle", 
            Convert.ToSingle( ds, null ), 
            Convert.ToSingle( ds, geMean ), 
            Convert.ToSingle( ds, median ) );
        Console.WriteLine( fmt, "ToUInt16", 
            Convert.ToUInt16( ds, null ), 
            Convert.ToUInt16( ds, geMean ), 
            Convert.ToUInt16( ds, median ) );
        Console.WriteLine( fmt, "ToUInt32", 
            Convert.ToUInt32( ds, null ), 
            Convert.ToUInt32( ds, geMean ), 
            Convert.ToUInt32( ds, median ) );
        Console.WriteLine( fmt, "ToUInt64", 
            Convert.ToUInt64( ds, null ), 
            Convert.ToUInt64( ds, geMean ), 
            Convert.ToUInt64( ds, median ) );
    }
   
    public static void Main(
 )
    {
        Console.WriteLine( "This example of " +
            "the Convert.ToXXX( object, IFormatProvider ) methods " +
            "\ngenerates the following output. The example " +
            "displays the values \nreturned by the methods, " +
            "using several IFormatProvider objects.\n"
 );
          
        DataSet ds1 = new DataSet( 
            10.5, 22.2, 45.9, 88.7, 156.05, 297.6 );
        DisplayDataSet( ds1 );
          
        DataSet ds2 = new DataSet( 
            359999.95, 425000, 499999.5, 775000, 1695000 );
        DisplayDataSet( ds2 );
    }
}

/*
This example of the Convert.ToXXX( object, IFormatProvider ) methods
generates the following output. The example displays the values
returned by the methods, using several IFormatProvider objects.

DataSet: [10.5, 22.2, 45.9, 88.7, 156.05, 297.6]

Convert.                 Default      Geometric Mean              Median
--------                 -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       103                  59                  67
ToChar                         g                   ;                   C
ToDateTime   2003-05-13 15:04:12 2003-05-13 15:03:28 2003-05-13 15:03:35
ToDecimal       103.491666666667    59.4332135445164                67.3
ToDouble        103.491666666667    59.4332135445164                67.3
ToInt16                      103                  59                  67
ToInt32                      103                  59                  67
ToInt64                      103                  59                  67
ToSByte                      103                  59                  67
ToSingle                103.4917            59.43321                67.3
ToUInt16                     103                  59                  67
ToUInt32                     103                  59                  67
ToUInt64                     103                  59                  67

DataSet: [359999.95, 425000, 499999.5, 775000, 1695000]

Convert.                 Default      Geometric Mean              Median
--------                 -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       255                 255                 255
ToChar                         ?                   ?                   ?
ToDateTime   2003-05-22 07:39:08 2003-05-20 22:28:45 2003-05-19 09:55:48
ToDecimal              750999.89    631577.237188435            499999.5
ToDouble               750999.89    631577.237188435            499999.5
ToInt16                    32767               32767               32767
ToInt32                   751000              631577              500000
ToInt64                   751000              631577              500000
ToSByte                      127                 127                 127
ToSingle                750999.9            631577.3            499999.5
ToUInt16                   65535               65535               65535
ToUInt32                  751000              631577              500000
ToUInt64                  751000              631577              500000
*/

C++

// Example of the Convert::ToXXX( Object*, IFormatProvider* ) methods.
using namespace System;
using namespace System::Collections;

// Define the types of averaging available in the class 
// implementing IConvertible.
enum class AverageType : short
{
   None = 0,
   GeometricMean = 1,
   ArithmeticMean = 2,
   Median = 3
};


// Pass an instance of this class to methods that require an 
// IFormatProvider. The class instance determines the type of 
// average to calculate.
ref class AverageInfo: public IFormatProvider
{
protected:
   AverageType AvgType;

public:

   // Specify the type of averaging in the constructor.
   AverageInfo( AverageType avgType )
   {
      this->AvgType = avgType;
   }


   // This method returns a reference to the containing object 
   // if an object of AverageInfo type is requested. 
   virtual Object^ GetFormat( Type^ argType )
   {
      if ( argType == AverageInfo::typeid)
            return this;
      else
            return (Object^)0;
   }


   property AverageType TypeOfAverage 
   {

      // Use this property to set or get the type of averaging.
      AverageType get()
      {
         return this->AvgType;
      }

      void set( AverageType value )
      {
         this->AvgType = value;
      }

   }

};


// This class encapsulates an array of double values and implements
 
// the IConvertible interface. Most of the IConvertible methods 
// return an average of the array elements in one of three types: 
// arithmetic mean, geometric mean, or median. 
ref class DataSet: public IConvertible
{
private:
   static Object^ null = nullptr;

protected:
   ArrayList^ data;
   AverageInfo^ defaultProvider;

   // This method unboxes a boxed double.
   double UnBoxDouble( Object^ obj )
   {
      return  *static_cast<double^>(obj);
   }


public:

   // Construct the object and add an initial list of values.
   // Create a default format provider.
   DataSet( ... array<Double>^values )
   {
      data = gcnew ArrayList( (Array^)values );
      defaultProvider = gcnew AverageInfo( AverageType::ArithmeticMean );
   }


   // Add additional values with this method.
   int Add( double value )
   {
      data->Add( value );
      return data->Count;
   }


   property double Item[ int ]
   {

      // Get, set, and add values with this indexer property.
      double get( int index )
      {
         if ( index >= 0 && index < data->Count
 )
                  return UnBoxDouble( data[ index ] );
         else
                  throw gcnew InvalidOperationException( "[DataSet.get]
 Index out of range." );
      }

      void set( int index,
 double value )
      {
         if ( index >= 0 && index < data->Count
 )
                  data[ index ] = value;
         else
         if ( index == data->Count )
                  data->Add( value );
         else
                  throw gcnew InvalidOperationException( "[DataSet.set]
 Index out of range." );
      }

   }

   property int Count 
   {

      // This property returns the number of elements in the object.
      int get()
      {
         return data->Count;
      }

   }

protected:

   // This method calculates the average of the object's elements.
   double Average( AverageType avgType )
   {
      double SumProd;
      if ( data->Count == 0 )
            return 0.0;

      switch ( avgType )
      {
         case AverageType::GeometricMean:
            SumProd = 1.0;
            for ( int Index = 0; Index <
 data->Count; Index++ )
               SumProd *= UnBoxDouble( data[ Index ] );
            
            // This calculation will not fail with negative 
            // elements.
            return Math::Sign( SumProd ) * Math::Pow( Math::Abs(
 SumProd ), 1.0 / data->Count );

         case AverageType::ArithmeticMean:
            SumProd = 0.0;
            for ( int Index = 0; Index <
 data->Count; Index++ )
               SumProd += UnBoxDouble( data[ Index ] );
            return SumProd / data->Count;

         case AverageType::Median:
            if ( data->Count % 2 == 0 )
                        return (UnBoxDouble( data[ data->Count
 / 2 ] ) + UnBoxDouble( data[ data->Count / 2 - 1 ] )) / 2.0;
            else
                        return UnBoxDouble( data[ data->Count
 / 2 ] );

         default:
            return 0.0;
      }
   }


   // Get the AverageInfo object from the caller's format provider,
   // or use the local default.
   AverageInfo^ GetAverageInfo( IFormatProvider^ provider )
   {
      AverageInfo^ avgInfo = nullptr;
      if ( provider != nullptr )
            avgInfo = static_cast<AverageInfo^>(provider->GetFormat( AverageInfo::typeid
 ));

      if ( avgInfo == nullptr )
            return defaultProvider;
      else
            return avgInfo;
   }


   // Calculate the average and limit the range.
   double CalcNLimitAverage( double min, double max, IFormatProvider^ provider )
   {
      
      // Get the format provider and calculate the average.
      AverageInfo^ avgInfo = GetAverageInfo( provider );
      double avg = Average( avgInfo->TypeOfAverage );
      
      // Limit the range, based on the minimum and maximum values 
      // for the type.
      return avg > max ? max : avg < min ? min : avg;
   }


public:

   // The following elements are required by IConvertible.
   // None of these conversion functions throw exceptions. When
   // the data is out of range for the type, the appropriate
   // MinValue or MaxValue is used.
   virtual TypeCode GetTypeCode()
   {
      return TypeCode::Object;
   }

   virtual bool ToBoolean( IFormatProvider^ provider )
   {
      
      // ToBoolean is false if the dataset is empty.
      if ( data->Count <= 0 )
            return false;
      // For median averaging, ToBoolean is true if any 
      // non-discarded elements are nonzero.
      else
      
      // For median averaging, ToBoolean is true if any 
      // non-discarded elements are nonzero.
      if ( AverageType::Median == GetAverageInfo( provider )->TypeOfAverage
 )
      {
         if ( data->Count % 2 == 0 )
                  return (UnBoxDouble( data[ data->Count /
 2 ] ) != 0.0 || UnBoxDouble( data[ data->Count / 2 - 1 ] ) != 0.0);
         else
                  return UnBoxDouble( data[ data->Count / 2
 ] ) != 0.0;
      }
      // For arithmetic or geometric mean averaging, ToBoolean is 
      // true if any element of the dataset is nonzero.  
      else
      {
         for ( int Index = 0; Index < data->Count;
 Index++ )
            if ( UnBoxDouble( data[ Index ] ) != 0.0 )
                        return true;
         return false;
      }
   }

   virtual Byte ToByte( IFormatProvider^ provider )
   {
      return Convert::ToByte( CalcNLimitAverage( Byte::MinValue,
 Byte::MaxValue, provider ) );
   }

   virtual Char ToChar( IFormatProvider^ provider )
   {
      return Convert::ToChar( Convert::ToUInt16( CalcNLimitAverage(
 Char::MinValue, Char::MaxValue, provider ) ) );
   }


   // Convert to DateTime by adding the calculated average as 
   // seconds to the current date and time. A valid DateTime is 
   // always returned.
   virtual DateTime ToDateTime( IFormatProvider^ provider )
   {
      double seconds = Average( GetAverageInfo( provider )->TypeOfAverage );
      try
      {
         return DateTime::Now.AddSeconds( seconds );
      }
      catch ( ArgumentOutOfRangeException^ ) 
      {
         return seconds < 0.0 ? DateTime::MinValue : DateTime::MaxValue;
      }

   }

   virtual Decimal ToDecimal( IFormatProvider^ provider )
   {
      
      // The Double conversion rounds Decimal.MinValue and 
      // Decimal.MaxValue to invalid Decimal values, so the 
      // following limits must be used.
      return Convert::ToDecimal( CalcNLimitAverage(  -79228162514264330000000000000.0,
 79228162514264330000000000000.0, provider ) );
   }

   virtual double ToDouble( IFormatProvider^ provider )
   {
      return Average( GetAverageInfo( provider )->TypeOfAverage
 );
   }

   virtual short ToInt16( IFormatProvider^ provider )
   {
      return Convert::ToInt16( CalcNLimitAverage( Int16::MinValue,
 Int16::MaxValue, provider ) );
   }

   virtual int ToInt32( IFormatProvider^ provider )
   {
      return Convert::ToInt32( CalcNLimitAverage( Int32::MinValue,
 Int32::MaxValue, provider ) );
   }

   virtual __int64 ToInt64( IFormatProvider^ provider )
   {
      
      // The Double conversion rounds Int64.MinValue and 
      // Int64.MaxValue to invalid Int64 values, so the following 
      // limits must be used.
      return Convert::ToInt64( CalcNLimitAverage(  -9223372036854775000,
 9223372036854775000, provider ) );
   }

   virtual signed char ToSByte( IFormatProvider^ provider )
   {
      return Convert::ToSByte( CalcNLimitAverage( SByte::MinValue,
 SByte::MaxValue, provider ) );
   }

   virtual float ToSingle( IFormatProvider^ provider )
   {
      return Convert::ToSingle( CalcNLimitAverage( Single::MinValue,
 Single::MaxValue, provider ) );
   }

   virtual UInt16 ToUInt16( IFormatProvider^ provider )
   {
      return Convert::ToUInt16( CalcNLimitAverage( UInt16::MinValue,
 UInt16::MaxValue, provider ) );
   }

   virtual UInt32 ToUInt32( IFormatProvider^ provider )
   {
      return Convert::ToUInt32( CalcNLimitAverage( UInt32::MinValue,
 UInt32::MaxValue, provider ) );
   }

   virtual UInt64 ToUInt64( IFormatProvider^ provider )
   {
      
      // The Double conversion rounds UInt64.MaxValue to an invalid
      // UInt64 value, so the following limit must be used.
      return Convert::ToUInt64( CalcNLimitAverage( 0, 18446744073709550000.0,
 provider ) );
   }

   virtual Object^ ToType( Type^ conversionType, IFormatProvider^ provider )
   {
      return Convert::ChangeType( Average( GetAverageInfo( provider
 )->TypeOfAverage ), conversionType );
   }

   virtual String^ ToString( IFormatProvider^ provider )
   {
      AverageType avgType = GetAverageInfo( provider )->TypeOfAverage;
      return String::Format( "( {0}: {1:G10} )", avgType,
 Average( avgType ) );
   }

};


// Display a DataSet with three different format providers.
void DisplayDataSet( DataSet^ ds )
{
   IFormatProvider^ null = nullptr;
   String^ fmt = "{0,-12}{1,20}{2,20}{3,20}";
   AverageInfo^ median = gcnew AverageInfo( AverageType::Median );
   AverageInfo^ geMean = gcnew AverageInfo( AverageType::GeometricMean );
   
   // Display the dataset elements.
   if ( ds->Count > 0 )
   {
      Console::Write( "\nDataSet: [{0}", ds->Item[ 0 ] );
      for ( int iX = 1; iX < ds->Count;
 iX++ )
         Console::Write( ", {0}", ds->Item[ iX ] );
      Console::WriteLine( "]\n" );
   }

   Console::WriteLine( fmt, "Convert::", "Default", "Geometric
 Mean", "Median" );
   Console::WriteLine( fmt, "---------", "-------", "--------------",
 "------" );
   Console::WriteLine( fmt, "ToBoolean", Convert::ToBoolean( ds, null
 ), Convert::ToBoolean( ds, geMean ), Convert::ToBoolean( ds, median ) );
   Console::WriteLine( fmt, "ToByte", Convert::ToByte( ds, null
 ), Convert::ToByte( ds, geMean ), Convert::ToByte( ds, median ) );
   Console::WriteLine( fmt, "ToChar", Convert::ToChar( ds, null
 ), Convert::ToChar( ds, geMean ), Convert::ToChar( ds, median ) );
   Console::WriteLine( "{0,-12}{1,20:yyyy-MM-dd HH:mm:ss}"
   "{2,20:yyyy-MM-dd HH:mm:ss}{3,20:yyyy-MM-dd HH:mm:ss}", "ToDateTime",
 Convert::ToDateTime( ds, null ), Convert::ToDateTime( ds, geMean
 ), Convert::ToDateTime( ds, median ) );
   Console::WriteLine( fmt, "ToDecimal", Convert::ToDecimal( ds, null
 ), Convert::ToDecimal( ds, geMean ), Convert::ToDecimal( ds, median ) );
   Console::WriteLine( fmt, "ToDouble", Convert::ToDouble( ds, null
 ), Convert::ToDouble( ds, geMean ), Convert::ToDouble( ds, median ) );
   Console::WriteLine( fmt, "ToInt16", Convert::ToInt16( ds, null
 ), Convert::ToInt16( ds, geMean ), Convert::ToInt16( ds, median ) );
   Console::WriteLine( fmt, "ToInt32", Convert::ToInt32( ds, null
 ), Convert::ToInt32( ds, geMean ), Convert::ToInt32( ds, median ) );
   Console::WriteLine( fmt, "ToInt64", Convert::ToInt64( ds, null
 ), Convert::ToInt64( ds, geMean ), Convert::ToInt64( ds, median ) );
   Console::WriteLine( fmt, "ToSByte", Convert::ToSByte( ds, null
 ), Convert::ToSByte( ds, geMean ), Convert::ToSByte( ds, median ) );
   Console::WriteLine( fmt, "ToSingle", Convert::ToSingle( ds, null
 ), Convert::ToSingle( ds, geMean ), Convert::ToSingle( ds, median ) );
   Console::WriteLine( fmt, "ToUInt16", Convert::ToUInt16( ds, null
 ), Convert::ToUInt16( ds, geMean ), Convert::ToUInt16( ds, median ) );
   Console::WriteLine( fmt, "ToUInt32", Convert::ToUInt32( ds, null
 ), Convert::ToUInt32( ds, geMean ), Convert::ToUInt32( ds, median ) );
   Console::WriteLine( fmt, "ToUInt64", Convert::ToUInt64( ds, null
 ), Convert::ToUInt64( ds, geMean ), Convert::ToUInt64( ds, median ) );
}

int main()
{
   Console::WriteLine( "This example of the "
   "Convert::ToXXX( Object*, IFormatProvider* ) methods "
   "\ngenerates the following output. The example "
   "displays the values \nreturned by the methods, "
   "using several IFormatProvider objects.\n" );
   
   // To call a [ParamArray] method in C++, you cannot just
   // list the parameters, you need to build an array.
   array<Double>^dataElem = gcnew array<Double>(6);
   dataElem[ 0 ] = 10.5;
   dataElem[ 1 ] = 22.2;
   dataElem[ 2 ] = 45.9;
   dataElem[ 3 ] = 88.7;
   dataElem[ 4 ] = 156.05;
   dataElem[ 5 ] = 297.6;
   DataSet^ ds1 = gcnew DataSet( dataElem );
   DisplayDataSet( ds1 );
   dataElem = gcnew array<Double>(5);
   dataElem[ 0 ] = 359999.95;
   dataElem[ 1 ] = 425000;
   dataElem[ 2 ] = 499999.5;
   dataElem[ 3 ] = 775000;
   dataElem[ 4 ] = 1695000;
   DataSet^ ds2 = gcnew DataSet( dataElem );
   DisplayDataSet( ds2 );
}

/*
This example of the Convert::ToXXX( Object*, IFormatProvider* ) methods
generates the following output. The example displays the values
returned by the methods, using several IFormatProvider objects.

DataSet: [10.5, 22.2, 45.9, 88.7, 156.05, 297.6]

Convert::                Default      Geometric Mean              Median
---------                -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       103                  59                  67
ToChar                         g                   ;                   C
ToDateTime   2003-05-13 15:30:23 2003-05-13 15:29:39 2003-05-13 15:29:47
ToDecimal       103.491666666667    59.4332135445164                67.3
ToDouble        103.491666666667    59.4332135445164                67.3
ToInt16                      103                  59                  67
ToInt32                      103                  59                  67
ToInt64                      103                  59                  67
ToSByte                      103                  59                  67
ToSingle                103.4917            59.43321                67.3
ToUInt16                     103                  59                  67
ToUInt32                     103                  59                  67
ToUInt64                     103                  59                  67

DataSet: [359999.95, 425000, 499999.5, 775000, 1695000]

Convert::                Default      Geometric Mean              Median
---------                -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       255                 255                 255
ToChar                         ?                   ?                   ?
ToDateTime   2003-05-22 08:05:19 2003-05-20 22:54:57 2003-05-19 10:21:59
ToDecimal              750999.89    631577.237188435            499999.5
ToDouble               750999.89    631577.237188435            499999.5
ToInt16                    32767               32767               32767
ToInt32                   751000              631577              500000
ToInt64                   751000              631577              500000
ToSByte                      127                 127                 127
ToSingle                750999.9            631577.3            499999.5
ToUInt16                   65535               65535               65535
ToUInt32                  751000              631577              500000
ToUInt64                  751000              631577              500000
*/

// Example of the Convert.ToXXX( object, IFormatProvider ) methods.
import System.* ;
import System.Collections.* ;

// Define the types of averaging available in the class 
// implementing IConvertible.
public class AverageType
{
    public static final short None = 0;
    public static final short GeometricMean
 = 1;
    public static final short ArithmeticMean
 = 2;
    public static final short Median = 3;
} //AverageType
// Pass an instance of this class to methods that require an 
// IFormatProvider. The class instance determines the type of 
// average to calculate.
public class AverageInfo implements IFormatProvider
{
    protected int avgType;   

    // Specify the type of averaging in the constructor.
    public AverageInfo(int  avgType) 
    {
        this.avgType = avgType;
    } //AverageInfo

    // This method returns a reference to the containing object 
    // if an object of AverageInfo type is requested. 
    public Object GetFormat(Type argType) 
    {
        if ( argType == AverageInfo.class.ToType())
 {
            return this ;
        }
        else {
            return null ;
        }
    } //GetFormat 

    // Use this property to set or get the type of averaging.
    /** @property 
     */
    public int get_TypeOfAverage()
    {
        return this.avgType ;
    } //get_TypeOfAverage

    /** @property 
     */
    public void set_TypeOfAverage(int
 value )
    {
        this.avgType = value;
    } //set_TypeOfAverage
} //AverageInfo


// This class encapsulates an array of double values and implements
 
// the IConvertible interface. Most of the IConvertible methods 
// return an average of the array elements in one of three types: 
// arithmetic mean, geometric mean, or median. 
public class DataSet implements IConvertible
{
    protected ArrayList data;
    protected AverageInfo defaultProvider;

    // Construct the object and add an initial list of values.
    // Create a default format provider.
    public DataSet(double values[])
    {
        data = new ArrayList(values);
        defaultProvider = new AverageInfo(AverageType.ArithmeticMean);
    } //DataSet

    // Add additional values with this method.
    public int Add(double value) 
    {
        data.Add(new Double(value));
        return data.get_Count() ;
    } //Add

    // Get, set, and add values with this indexer property.
    /** @property 
     */
    public double get_Item(int index) throws
 InvalidOperationException
    {
        if ((index >= 0) && (index < data.get_Count()))
 {
            return Convert.ToDouble((data.get_Item(index))) ;
        }
        else {
            throw new InvalidOperationException(
                "[DataSet.get] Index out of range.")
 ;
        }
    } //get_Item

    /** @property 
     */
    public void set_Item(int
 index, double value) 
        throws InvalidOperationException
    {
        if ((index >= 0) && (index < data.get_Count()))
 {
            data.set_Item( index ,(Int64) value );
        }
        else {
            if ( index == data.get_Count()  ) {
                data.Add((Int64)value);
            }
            else {            
                throw new InvalidOperationException(
                    "[DataSet.set] Index out of range.")
 ;
            }
        }
    } //set_Item

    // This property returns the number of elements in the object.
    /** @property 
     */
    public int get_Count()
    {
        return data.get_Count() ;
    } //get_Count

    // This method calculates the average of the object's elements.
    protected double Average(int avgType)
    {
        double SumProd;

        if ( data.get_Count() == 0  ) {
            return 0.0 ;
        }

        if (avgType == AverageType.GeometricMean) { 
            SumProd = 1.0;
            for(int index =0 ; index < data.get_Count();
 index++) {        
                SumProd = SumProd * Convert.ToDouble((data.get_Item(index)));
            }  
            // This calculation will not fail with negative 
            // elements.
            return System.Math.Sign(SumProd) 
                * System.Math.Pow(System.Math.Abs(SumProd), 
                1.0 / data.get_Count());
        }
        else if (avgType == AverageType.ArithmeticMean
 ) { 
            SumProd = 0.0;
            for(int Index=0; Index < data.get_Count();
 Index++) {
                SumProd += Convert.ToDouble((data.get_Item(Index)));
            }  
            return SumProd / data.get_Count() ;
        }
        else if (avgType == AverageType.Median
 ) {
            if ( (data.get_Count() % 2) == 0 ) {
                return ((Convert.ToDouble(data.get_Item(data.get_Count()
 / 2))
                    + Convert.ToDouble(data.get_Item(data.get_Count() 
                    / 2 - 1))) / 2.0);
            }
            else {        
                return Convert.ToDouble(((data.get_Item((data.get_Count()
 
                    / 2))))) ;
            }
        }
        else {
            return 0.0 ;
        }
    } //Average


    // Get the AverageInfo object from the caller's format provider
,
    // or use the local default.
    protected AverageInfo GetAverageInfo(IFormatProvider provider)
    {
        AverageInfo avgInfo = null;

        if ( provider  != null  ) {
            avgInfo =((AverageInfo)(provider.GetFormat(
                    AverageInfo.class.ToType())));
        }

        if ( avgInfo == null  ) {
            return defaultProvider ;
        }
        else {        
            return avgInfo ;
        }
    } //GetAverageInfo

    // Calculate the average and limit the range.
    protected double CalcNLimitAverage(
        double min, double max, IFormatProvider provider)
    {
        // Get the format provider and calculate the average.
        AverageInfo avgInfo = GetAverageInfo(provider);
        double avg = Average(avgInfo.get_TypeOfAverage());

        // Limit the range, based on the minimum and maximum values
 
        // for the type.
        return(avg > max) ? max :(avg < min) ? min : avg
 ;
    } //CalcNLimitAverage

    // The following elements are required by IConvertible.
    // None of these conversion functions throw exceptions. When
    // the data is out of range for the type, the appropriate
    // MinValue or MaxValue is used.
    public TypeCode GetTypeCode()
    {
        return TypeCode.Object ;
    } //GetTypeCode

    public boolean ToBoolean(IFormatProvider provider) 
    {
        // ToBoolean is false if the dataset is empty.
        if ( data.get_Count() <= 0  ) {
            return false ;
        }

        // For median averaging, ToBoolean is true if any 
        // non-discarded elements are nonzero.
        else {
            if ( AverageType.Median == GetAverageInfo(
                provider).get_TypeOfAverage()  ) {
                if ( (data.get_Count() % 2) == 0  ) {
                    return Convert.ToDouble(data.get_Item((data.get_Count()
 
                        / 2))) != 0.0 || Convert.ToDouble(data.get_Item(
                        (data.get_Count() / 2 - 1))) != 0.0;
                }
                else {
                    return Convert.ToDouble(data.get_Item((data.get_Count()
 
                        / 2))) != 0.0;
                }
            }

            // For arithmetic or geometric mean averaging, ToBoolean is
 
            // true if any element of the dataset is nonzero.  
            else {
                for(int index=0; index <
 data.get_Count(); index++) {
                    if (Convert.ToDouble(data.get_Item(index))
 != 0.0) {
                        return true ;
                    }
                } 
                return false ;
            }
        }
    } //ToBoolean

    public ubyte ToByte(IFormatProvider provider)
    {
        return Convert.ToByte(CalcNLimitAverage(0, 255, provider));
    } //ToByte

    public char ToChar(IFormatProvider provider)
 
    {
        return Convert.ToChar(Convert.ToUInt16(CalcNLimitAverage(Char.MinValue
,
            Char.MaxValue, provider))) ;
    } //ToChar

    // Convert to DateTime by adding the calculated average as 
    // seconds to the current date and time. A valid DateTime is 
    // always returned.
    public DateTime ToDateTime(IFormatProvider provider)
    {
        double seconds = Average(GetAverageInfo(provider).get_TypeOfAverage());
        try {
            return DateTime.get_Now().AddSeconds(seconds) ;
        }
        catch(ArgumentOutOfRangeException exp) {
            return(seconds < 0.0) ? DateTime.MinValue : DateTime.MaxValue
 ;
        }
    } //ToDateTime

    public System.Decimal ToDecimal(IFormatProvider provider)
    {
        // The Double conversion rounds Decimal.MinValue and 
        // Decimal.MaxValue to invalid Decimal values, so the 
        // following limits must be used.
        return Convert.ToDecimal(CalcNLimitAverage(-7.92281625142643E+28,
 
            7.92281625142643E+28, provider)) ;
    } //ToDecimal

    public double ToDouble(IFormatProvider provider)
    {
        return Average(GetAverageInfo(provider).get_TypeOfAverage())
 ;
    } //ToDouble

    public short ToInt16(IFormatProvider provider)
    {
        return Convert.ToInt16(CalcNLimitAverage(Int16.MinValue,
 
            Int16.MaxValue, provider)) ;
    } //ToInt16

    public int ToInt32(IFormatProvider provider)
    {
        return Convert.ToInt32(CalcNLimitAverage(Int32.MinValue,
 Int32.MaxValue,
            provider)) ;
    } //ToInt32

    public long ToInt64(IFormatProvider provider) 
    {
        // The Double conversion rounds Int64.MinValue and 
        // Int64.MaxValue to invalid Int64 values, so the following
 
        // limits must be used.
        return Convert.ToInt64(CalcNLimitAverage(-9223372036854775000L,
 
            9223372036854775000L, provider)) ;
    } //ToInt64

    public byte ToSByte(IFormatProvider provider)
    {
        return Convert.ToSByte(CalcNLimitAverage(SByte.MinValue,
 SByte.MaxValue,
            provider)) ;
    } //ToSByte

    public float ToSingle(IFormatProvider provider)
    {
        return Convert.ToSingle(CalcNLimitAverage(Single.MinValue,
 
            Single.MaxValue, provider)) ;
    } //ToSingle

    public UInt16 ToUInt16(IFormatProvider provider)
    {
        return Convert.ToUInt16(CalcNLimitAverage(
            Convert.ToDouble(UInt16.MinValue), 
            Convert.ToDouble(UInt16.MaxValue), provider));
    } //ToUInt16

    public UInt32 ToUInt32(IFormatProvider provider)
    {
        return Convert.ToUInt32(CalcNLimitAverage(
            Convert.ToDouble(UInt32.MinValue), 
            Convert.ToDouble(UInt32.MaxValue), provider)) ;
    } //ToUInt32

    public UInt64 ToUInt64(IFormatProvider provider)
    {
        // The Double conversion rounds UInt64.MaxValue to an invalid
        // UInt64 value, so the following limit must be used.
        return Convert.ToUInt64(CalcNLimitAverage(0, 1.84467440737095E+19,
 
            provider)) ;
    } //ToUInt64

    public Object ToType(Type conversionType, IFormatProvider
 provider)
    {
        return Convert.ChangeType((System.Double)Average(
            GetAverageInfo(provider).get_TypeOfAverage()), conversionType) ;
    } //ToType


    public String ToString(IFormatProvider provider)
    {
        int avgType = GetAverageInfo(provider).get_TypeOfAverage();
        return String.Format("( {0}: {1} )", (Int32)avgType,
 
            ((System.Double)Average(avgType)).ToString("G10"));
    } //ToString
} //DataSet

class IConvertibleProviderDemo
{
    // Display a DataSet with three different format providers.
    public static void DisplayDataSet(DataSet
 ds) 
        throws InvalidOperationException
    {
        String fmt = "{0,-12}{1,20}{2,20}{3,20}";
        AverageInfo median =  new AverageInfo(AverageType.Median);
        AverageInfo geMean = new AverageInfo(AverageType.GeometricMean);

        // Display the dataset elements.
        if ( ds.get_Count() > 0  ) {
            Console.Write("\nDataSet: [{0}", (System.Double)ds.get_Item(
 0));
            for(int iX=1; iX < ds.get_Count();
 iX++) {            
                Console.Write(", {0}",(System.Double) ds.get_Item( iX));
            } 
            Console.WriteLine("]\n");
        }

        Console.WriteLine(fmt, new Object[] { "Convert.",
 "Default", 
            "Geometric Mean", "Median" });
        Console.WriteLine(fmt, new Object[] { "--------",
 "-------", 
            "--------------", "------" });
        Console.WriteLine(fmt, new Object[] { "ToBoolean",
 
            (System.Boolean)Convert.ToBoolean(ds, null),
            (System.Boolean)Convert.ToBoolean(ds, geMean),
            (System.Boolean)Convert.ToBoolean(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToByte",
 
            (Convert.ToString(Convert.ToByte(ds, null))), 
            (Convert.ToString(Convert.ToByte(ds, geMean))), 
            (Convert.ToString(Convert.ToByte(ds, median))) });
        Console.WriteLine(fmt, new Object[] { "ToChar",
 
            (Char)Convert.ToChar(ds, null), 
            (Char)Convert.ToChar(ds, geMean), 
            (Char)Convert.ToChar(ds, median) });
        Console.WriteLine("{0,-12}{1,20:yyyy-MM-dd HH:mm:ss}"
            + "{2,20:yyyy-MM-dd HH:mm:ss}{3,20:yyyy-MM-dd HH:mm:ss}",
            new Object[] { "ToDateTime", Convert.ToDateTime(ds,
 null), 
            Convert.ToDateTime(ds, geMean),    Convert.ToDateTime(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToDecimal",
 
            Convert.ToDecimal(ds, null), Convert.ToDecimal(ds,
 geMean), 
            Convert.ToDecimal(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToDouble",
 
            (System.Double)Convert.ToDouble(ds, null), 
            (System.Double)Convert.ToDouble(ds, geMean), 
            (System.Double)Convert.ToDouble(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToInt16",
 
            (System.Int16)Convert.ToInt16(ds, null), 
            (System.Int16)Convert.ToInt16(ds, geMean), 
            (System.Int16)Convert.ToInt16(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToInt32",
 
            (System.Int32)Convert.ToInt32(ds, null), 
            (System.Int32)Convert.ToInt32(ds, geMean), 
            (System.Int32)Convert.ToInt32(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToInt64",
 
            (System.Int64)Convert.ToInt64(ds, null), 
            (System.Int64)Convert.ToInt64(ds, geMean), 
            (System.Int64)Convert.ToInt64(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToSByte",
 
            (System.SByte)Convert.ToSByte(ds, null), 
            (System.SByte)Convert.ToSByte(ds, geMean), 
            (System.SByte)Convert.ToSByte(ds, median) });
        Console.WriteLine(fmt, new Object[] { "ToSingle",
 
            new Decimal(Convert.ToSingle(ds, null)),
 
            new Decimal(Convert.ToSingle(ds, geMean)), 
            new Decimal(Convert.ToSingle(ds, median) )});
        Console.WriteLine(fmt, new Object[] { "ToUInt16",
 
            Convert.ToUInt16(ds, null), 
            Convert.ToUInt16(ds, geMean), 
            Convert.ToUInt16(ds, median)});
        Console.WriteLine(fmt, new Object[] { "ToUInt32",
 
            Convert.ToUInt32(ds, null), 
            Convert.ToUInt32(ds, geMean), 
            Convert.ToUInt32(ds, median)});
        Console.WriteLine(fmt, new Object[] { "ToUInt64",
 
            Convert.ToUInt64(ds, null), 
            Convert.ToUInt64(ds, geMean), 
            Convert.ToUInt64(ds, median)});
    } //DisplayDataSet

    public static void main(String[]
 args) throws InvalidOperationException
    {
        Console.WriteLine(("This example of " 
            + "the Convert.ToXXX( object, IFormatProvider ) methods "
            + "\ngenerates the following output. The example " 
            + "displays the values \nreturned by the methods, " 
            + "using several IFormatProvider objects.\n"));

        DataSet ds1 = new DataSet(new double[]
 { 10.5, 22.2, 45.9, 88.7,
                    156.05, 297.6 });
        DisplayDataSet(ds1);
        DataSet ds2 = new DataSet(new double[]
 { 359999.95, 425000, 499999.5, 
                    775000, 1695000 });
        DisplayDataSet(ds2);
    } //main
} //IConvertibleProviderDemo

/*
This example of the Convert.ToXXX( object, IFormatProvider ) methods
generates the following output. The example displays the values
returned by the methods, using several IFormatProvider objects.

DataSet: [10.5, 22.2, 45.9, 88.7, 156.05, 297.6]

Convert.                 Default      Geometric Mean              Median
--------                 -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       103                  59                  67
ToChar                         g                   ;                   C
ToDateTime   2003-05-13 15:04:12 2003-05-13 15:03:28 2003-05-13 15:03:35
ToDecimal       103.491666666667    59.4332135445164                67.3
ToDouble        103.491666666667    59.4332135445164                67.3
ToInt16                      103                  59                  67
ToInt32                      103                  59                  67
ToInt64                      103                  59                  67
ToSByte                      103                  59                  67
ToSingle                103.4917            59.43321                67.3
ToUInt16                     103                  59                  67
ToUInt32                     103                  59                  67
ToUInt64                     103                  59                  67

DataSet: [359999.95, 425000, 499999.5, 775000, 1695000]

Convert.                 Default      Geometric Mean              Median
--------                 -------      --------------              ------
ToBoolean                   True                True                True
ToByte                       255                 255                 255
ToChar                         ?                   ?                   ?
ToDateTime   2003-05-22 07:39:08 2003-05-20 22:28:45 2003-05-19 09:55:48
ToDecimal              750999.89    631577.237188435            499999.5
ToDouble               750999.89    631577.237188435            499999.5
ToInt16                    32767               32767               32767
ToInt32                   751000              631577              500000
ToInt64                   751000              631577              500000
ToSByte                      127                 127                 127
ToSingle                750999.9            631577.3            499999.5
ToUInt16                   65535               65535               65535
ToUInt32                  751000              631577              500000
ToUInt64                  751000              631577              500000
*/

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド

指定した値を 64 ビット符号なし整数に変換します。
オーバーロードの一覧

名前	説明
Convert.ToUInt64 (Boolean)	指定したブール値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Byte)	指定した 8 ビット符号なし整数の値を等価の 64 ビット符号付き整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Char)	指定した Unicode 文字の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (DateTime)	このメソッドを呼び出すと、必ず InvalidCastException がスローされます。
Convert.ToUInt64 (Decimal)	指定した Decimal 数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Double)	指定した倍精度浮動小数点数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Int16)	指定した 64 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Int32)	指定した 32 ビット符号付き整数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Int64)	指定した 64 ビット符号付き整数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Object)	指定した Object の値を 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (SByte)	指定した 64 ビット符号付き整数の値を等価の 8 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Single)	指定した単精度浮動小数点数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (String)	指定した String 形式の数値を、それと等価な 64 ビット符号付き整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (UInt16)	指定した 16 ビット符号なし整数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (UInt32)	指定した 32 ビット符号なし整数の値を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (UInt64)	指定した 64 ビット符号なし整数が返されます。実際の変換は行われません。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (Object, IFormatProvider)	カルチャに固有の指定した書式情報を使用して、指定した Object の値を 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (String, IFormatProvider)	指定したカルチャに固有の書式情報を使用して、指定した String 形式の数値を、それと等価な 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。
Convert.ToUInt64 (String, Int32)	指定した基数での数値の String 形式を等価の 64 ビット符号なし整数に変換します。 .NET Compact Framework によってサポートされています。

参照

Convert.ToUInt64 メソッド (Decimal)

指定した Decimal 数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Decimal _
) As ULong

Visual Basic (使用法)

Dim value As Decimal
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    decimal value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    Decimal value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    Decimal value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : decimal
) : ulong

パラメータ

value: Decimal の数値。

例外

例外の種類	条件
OverflowException	value が 0 未満の値か、UInt64.MaxValue より大きい値です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間
System.Math.Round

Convert.ToUInt64 メソッド (String, Int32)

指定した基数での数値の String 形式を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As String, _
    fromBase As Integer _
) As ULong

Visual Basic (使用法)

Dim value As String
Dim fromBase As Integer
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value, fromBase)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    string value,
    int fromBase
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    String^ value, 
    int fromBase
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    String value, 
    int fromBase
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : String, 
    fromBase : int
) : ulong

パラメータ

value: 数値を含んでいる String。

fromBase: value 内の数値の基数。これは 2、8、10、または 16 である必要があります。

戻り値
value 内の数値と等しい 64 ビット符号なし整数。または value が null 参照 (Visual Basic では Nothing) の場合は 0。

例外

例外の種類	条件
ArgumentException	fromBase が 2、8、10、または 16 ではありません。または基数が 10 以外の符号なし数値を表す value がマイナス記号で始まっています。
FormatException	value には、fromBase で指定された基数に対して有効な桁を示す数字以外の文字が含まれています。例外メッセージは、value の最初の文字が無効な場合は変換する数字が存在しないことを示し、それ以外の場合は value に無効な後続文字が含まれることを示します。
OverflowException	基数が 10 以外の符号なし数値を表す value がマイナス記号で始まっています。または戻り値が UInt64.MinValue より小さい値か、UInt64.MaxValue より大きい値です。

例外の種類

条件

ArgumentException

fromBase が 2、8、10、または 16 ではありません。

または

基数が 10 以外の符号なし数値を表す value がマイナス記号で始まっています。

FormatException

value には、fromBase で指定された基数に対して有効な桁を示す数字以外の文字が含まれています。例外メッセージは、value の最初の文字が無効な場合は変換する数字が存在しないことを示し、それ以外の場合は value に無効な後続文字が含まれることを示します。

OverflowException

基数が 10 以外の符号なし数値を表す value がマイナス記号で始まっています。

または

戻り値が UInt64.MinValue より小さい値か、UInt64.MaxValue より大きい値です。

解説

fromBase が 16 の場合、value パラメータで指定する数値の前には "0x" または "0X" を付けることができます。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (String, IFormatProvider)

指定したカルチャに固有の書式情報を使用して、指定した String 形式の数値を、それと等価な 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As String, _
    provider As IFormatProvider _
) As ULong

Visual Basic (使用法)

Dim value As String
Dim provider As IFormatProvider
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value, provider)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    string value,
    IFormatProvider provider
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    String^ value, 
    IFormatProvider^ provider
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    String value, 
    IFormatProvider provider
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : String, 
    provider : IFormatProvider
) : ulong

パラメータ

value: 変換する数値を格納している String。

provider: カルチャに固有の書式情報を提供する IFormatProvider インターフェイス実装。

戻り値
value の値と等価な 64 ビット符号なし整数。または value が null 参照 (Visual Basic では Nothing) の場合は 0。

例外

例外の種類	条件
FormatException	value の構成が、省略可能な符号と、それに続く 0 から 9 までの一連の数字ではありません。
OverflowException	value が MinValue 未満の数値か、MaxValue より大きい数値を表しています。

解説

戻り値は、value に対して UInt64.Parse メソッドを実行した結果です。

provider は、NumberFormatInfo オブジェクトを取得する IFormatProvider インスタンスです。NumberFormatInfo オブジェクトは、value の書式に関するカルチャ固有の情報を提供します。provider が null 参照 (Visual Basic では Nothing) の場合は、現在のカルチャの NumberFormatInfo が使用されます。

使用例

IFormatProvider オブジェクトを使用して、ToUInt64 メソッドで String 形式の 64 ビット符号なし整数を変換するコード例を次に示します。

Visual Basic

' Example of the Convert.ToUInt64( String ) and 
' Convert.ToUInt64( String, IFormatProvider ) methods.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic

Module ToUInt64ProviderDemo

    Dim format As String
 = "{0,-24}{1,-22}{2}"

    ' Get the exception type name; remove the namespace prefix.
    Function GetExceptionType( ex As Exception
 ) As String

        Dim exceptionType   As String
 = ex.GetType( ).ToString( )
        Return exceptionType.Substring( _
            exceptionType.LastIndexOf( "."c ) + 1
 )
    End Function

    Sub ConvertToUInt64( numericStr As String,
 _
        provider As IFormatProvider )

        Dim defaultValue    As Object
        Dim providerValue   As Object

        ' Convert numericStr to UInt64 without a format provider.
        Try
            defaultValue = Convert.ToUInt64( numericStr )
        Catch ex As Exception
            defaultValue = GetExceptionType( ex )
        End Try

        ' Convert numericStr to UInt64 with a format provider.
        Try
            providerValue = Convert.ToUInt64( numericStr, provider )
        Catch ex As Exception
            providerValue = GetExceptionType( ex )
        End Try

        Console.WriteLine( format, numericStr, _
            defaultValue, providerValue )
    End Sub

    Sub Main( )

        ' Create a NumberFormatInfo object and set several of its
        ' properties that apply to numbers.
        Dim provider  As NumberFormatInfo =
 new NumberFormatInfo( )

        ' These properties affect the conversion.
        provider.PositiveSign = "pos "
        provider.NegativeSign = "neg "

        ' These properties do not affect the conversion.
        ' The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = "."
        provider.NumberGroupSeparator = ","
        provider.NumberGroupSizes = New Integer(
 ) { 3 }

        Console.WriteLine( "This example of" &
 vbCrLf & _
            "  Convert.ToUInt64( String ) and " &
 vbCrLf & _
            "  Convert.ToUInt64( String, IFormatProvider ) "
 & _
            vbCrLf & "generates the following output. It "
 & _
            "converts several strings to unsigned "
 & vbCrLf & _
            "Long values, using default formatting "
 & _
            "or a NumberFormatInfo object." &
 vbCrLf )
        Console.WriteLine( format, "String to convert",
 _
            "Default/exception", "Provider/exception"
 )
        Console.WriteLine( format, "-----------------",
 _
            "-----------------", "------------------"
 )

        ' Convert strings, with and without an IFormatProvider.
        ConvertToUInt64( "123456789012", provider
 )
        ConvertToUInt64( "+123456789012", provider
 )
        ConvertToUInt64( "pos 123456789012", provider
 )
        ConvertToUInt64( "123456789012.", provider
 )
        ConvertToUInt64( "123,456,789,012", provider
 )
        ConvertToUInt64( "18446744073709551615", provider
 )
        ConvertToUInt64( "18446744073709551616", provider
 )
        ConvertToUInt64( "-1", provider )
    End Sub 
End Module 

' This example of
'   Convert.ToUInt64( String ) and
'   Convert.ToUInt64( String, IFormatProvider )
' generates the following output. It converts several strings to unsigned
' Long values, using default formatting or a NumberFormatInfo object.
' 
' String to convert       Default/exception     Provider/exception
' -----------------       -----------------     ------------------
' 123456789012            123456789012          123456789012
' +123456789012           123456789012          FormatException
' pos 123456789012        FormatException       123456789012
' 123456789012.           FormatException       FormatException
' 123,456,789,012         FormatException       FormatException
' 18446744073709551615    18446744073709551615  18446744073709551615
' 18446744073709551616    OverflowException     OverflowException
' -1                      OverflowException     FormatException

// Example of the Convert.ToUInt64( string ) and 
// Convert.ToUInt64( string, IFormatProvider ) methods.
using System;
using System.Globalization;

class ToUInt64ProviderDemo
{
    static string format = "{0,-24}{1
,-22}{2}";

     // Get the exception type name; remove the namespace prefix.
    static string GetExceptionType( Exception
 ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring( 
            exceptionType.LastIndexOf( '.' ) + 1 );
    }

    static void ConvertToUInt64( string
 numericStr, 
        IFormatProvider provider )
    {
        object defaultValue;
        object providerValue;

        // Convert numericStr to UInt64 without a format provider.
        try
        {
            defaultValue = Convert.ToUInt64( numericStr );
        }
        catch( Exception ex )
        {
            defaultValue = GetExceptionType( ex );
        }

        // Convert numericStr to UInt64 with a format provider.
        try
        {
            providerValue = Convert.ToUInt64( numericStr, provider );
        }
        catch( Exception ex )
        {
            providerValue = GetExceptionType( ex );
        }

        Console.WriteLine( format, numericStr, 
            defaultValue, providerValue );
    }

    public static void Main(
 )
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.NegativeSign = "neg ";
        provider.PositiveSign = "pos ";

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.NumberDecimalSeparator = ".";
        provider.NumberGroupSeparator = ",";
        provider.NumberGroupSizes = new int[
 ] { 3 };

        Console.WriteLine("This example of\n" +
            "  Convert.ToUInt64( string ) and \n" +
            "  Convert.ToUInt64( string, IFormatProvider
 ) " +
            "\ngenerates the following output. It converts " +
            "several strings to \nulong values, using "
 +
            "default formatting or a NumberFormatInfo object.\n"
 );
        Console.WriteLine( format, "String to convert", 
            "Default/exception", "Provider/exception" );
        Console.WriteLine( format, "-----------------", 
            "-----------------", "------------------" );

        // Convert strings, with and without an IFormatProvider.
        ConvertToUInt64( "123456789012", provider );
        ConvertToUInt64( "+123456789012", provider );
        ConvertToUInt64( "pos 123456789012", provider );
        ConvertToUInt64( "123456789012.", provider );
        ConvertToUInt64( "123,456,789,012", provider );
        ConvertToUInt64( "18446744073709551615", provider );
        ConvertToUInt64( "18446744073709551616", provider );
        ConvertToUInt64( "-1", provider );
    }
}

/*
This example of
  Convert.ToUInt64( string ) and
  Convert.ToUInt64( string, IFormatProvider )
generates the following output. It converts several strings to
ulong values, using default formatting or a
 NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

C++

// Example of the Convert::ToUInt64( String* ) and 
// Convert::ToUInt64( String*, IFormatProvider* ) methods.
using namespace System;
using namespace System::Globalization;
const __wchar_t * protoFmt = L"{0,-24}{1,-22}{2}";

// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
   String^ exceptionType = ex->GetType()->ToString();
   return exceptionType->Substring( exceptionType->LastIndexOf(
 '.' ) + 1 );
}

void ConvertToUInt64( String^ numericStr, IFormatProvider^ provider
 )
{
   Object^ defaultValue;
   Object^ providerValue;
   
   // Convert numericStr to UInt64 without a format provider.
   try
   {
      defaultValue = Convert::ToUInt64( numericStr );
   }
   catch ( Exception^ ex ) 
   {
      defaultValue = GetExceptionType( ex );
   }

   
   // Convert numericStr to UInt64 with a format provider.
   try
   {
      providerValue = Convert::ToUInt64( numericStr, provider );
   }
   catch ( Exception^ ex ) 
   {
      providerValue = GetExceptionType( ex );
   }

   Console::WriteLine( gcnew String( protoFmt ), numericStr, defaultValue, providerValue
 );
}

int main()
{
   
   // Create a NumberFormatInfo object and set several of its
   // properties that apply to numbers.
   NumberFormatInfo^ provider = gcnew NumberFormatInfo;
   
   // These properties affect the conversion.
   provider->NegativeSign = "neg ";
   provider->PositiveSign = "pos ";
   
   // These properties do not affect the conversion.
   // The input string cannot have decimal and group separators.
   provider->NumberDecimalSeparator = ".";
   provider->NumberGroupSeparator = ",";
   array<Int32>^sizes = {3};
   provider->NumberGroupSizes = sizes;
   Console::WriteLine( "This example of\n"
   "  Convert::ToUInt64( String* ) and \n"
   "  Convert::ToUInt64( String*, IFormatProvider* ) "
   "\ngenerates the following output. It converts "
   "several strings to unsigned \n__int64 values, using "
   "default formatting or a NumberFormatInfo object.\n"
 );
   Console::WriteLine( gcnew String( protoFmt ), "String to convert", "Default/exception",
 "Provider/exception" );
   Console::WriteLine( gcnew String( protoFmt ), "-----------------", "-----------------",
 "------------------" );
   
   // Convert strings, with and without an IFormatProvider.
   ConvertToUInt64( "123456789012", provider );
   ConvertToUInt64( "+123456789012", provider );
   ConvertToUInt64( "pos 123456789012", provider );
   ConvertToUInt64( "123456789012.", provider );
   ConvertToUInt64( "123,456,789,012", provider );
   ConvertToUInt64( "18446744073709551615", provider );
   ConvertToUInt64( "18446744073709551616", provider );
   ConvertToUInt64( "-1", provider );
}

/*
This example of
  Convert::ToUInt64( String* ) and
  Convert::ToUInt64( String*, IFormatProvider* )
generates the following output. It converts several strings to unsigned
__int64 values, using default formatting or
 a NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

// Example of the Convert.ToUInt64( string ) and 
// Convert.ToUInt64( string, IFormatProvider ) methods.
import System.* ;
import System.Globalization.* ;

class ToUInt64ProviderDemo
{
    private static String format = "{0,-24}{1,-22}{2}";
   
   
    // Get the exception type name; remove the namespace prefix.
    static String GetExceptionType(System.Exception ex)
    {
        String exceptionType = ex.GetType().ToString();
        return exceptionType.Substring((exceptionType.LastIndexOf('.')
 + 1));
    } //GetExceptionType   
   
    static void ConvertToUInt64(String numericStr,
 IFormatProvider provider)
    {
        Object defaultValue;
        Object providerValue;

        // Convert numericStr to UInt64 without a format provider.
        try    {
            defaultValue = Convert.ToUInt64(numericStr);
        }
        catch (System.Exception ex)    {
            defaultValue = GetExceptionType(ex);
        }

        // Convert numericStr to UInt64 with a format provider.
        try    {
            providerValue = Convert.ToUInt64(numericStr, provider);
        }
        catch (System.Exception ex)    {
            providerValue = GetExceptionType(ex);
        }
        Console.WriteLine(format, numericStr, defaultValue, providerValue);
    } //ConvertToUInt64

    public static void main(String[]
 args)
    {
        // Create a NumberFormatInfo object and set several of its
        // properties that apply to numbers.
        NumberFormatInfo provider = new NumberFormatInfo();

        // These properties affect the conversion.
        provider.set_NegativeSign("neg ");
        provider.set_PositiveSign("pos ");

        // These properties do not affect the conversion.
        // The input string cannot have decimal and group separators.
        provider.set_NumberDecimalSeparator(".");
        provider.set_NumberGroupSeparator(",");
        provider.set_NumberGroupSizes(new int[]
 { 3 });
        Console.WriteLine(("This example of\n" 
            + "  Convert.ToUInt64( string ) and \n"
            + "  Convert.ToUInt64( string, IFormatProvider
 ) " 
            + "\ngenerates the following output. It converts " 
            + "several strings to \nulong values, using "
 
            + "default formatting or a NumberFormatInfo object.\n"));
        Console.WriteLine(format, "String to convert", "Default/exception"
,
            "Provider/exception");
        Console.WriteLine(format, "-----------------", "-----------------"
,
            "------------------");

        // Convert strings, with and without an IFormatProvider.
        ConvertToUInt64("123456789012", provider);
        ConvertToUInt64("+123456789012", provider);
        ConvertToUInt64("pos 123456789012", provider);
        ConvertToUInt64("123456789012.", provider);
        ConvertToUInt64("123,456,789,012", provider);
        ConvertToUInt64("18446744073709551615", provider);
        ConvertToUInt64("18446744073709551616", provider);
        ConvertToUInt64("-1", provider);
    } //main
} //ToUInt64ProviderDemo

/*
This example of
  Convert.ToUInt64( string ) and
  Convert.ToUInt64( string, IFormatProvider )
generates the following output. It converts several strings to
ulong values, using default formatting or a
 NumberFormatInfo object.

String to convert       Default/exception     Provider/exception
-----------------       -----------------     ------------------
123456789012            123456789012          123456789012
+123456789012           123456789012          FormatException
pos 123456789012        FormatException       123456789012
123456789012.           FormatException       FormatException
123,456,789,012         FormatException       FormatException
18446744073709551615    18446744073709551615  18446744073709551615
18446744073709551616    OverflowException     OverflowException
-1                      OverflowException     FormatException
*/

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Byte)

指定した 8 ビット符号なし整数の値を等価の 64 ビット符号付き整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Byte _
) As ULong

Visual Basic (使用法)

Dim value As Byte
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    byte value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    unsigned char value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    byte value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : byte
) : ulong

パラメータ

value: 8 ビット符号なし整数。

戻り値
value の値と等価な 64 ビット符号付き整数。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (UInt64)

指定した 64 ビット符号なし整数が返されます。実際の変換は行われません。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As ULong _
) As ULong

Visual Basic (使用法)

Dim value As ULong
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    ulong value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    usigned long long value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    UInt64 value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : ulong
) : ulong

パラメータ

value: 64 ビット符号なし整数。

戻り値
パラメータ value は変更されずに返されます。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Int16)

指定した 64 ビット符号付き整数の値を等価の 16 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Short _
) As ULong

Visual Basic (使用法)

Dim value As Short
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    short value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    short value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    short value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : short
) : ulong

パラメータ

value: 16 ビット符号付き整数。

戻り値
value の値と等価な 64 ビット符号なし整数。

例外

例外の種類	条件
OverflowException	value が 0 未満です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Int32)

指定した 32 ビット符号付き整数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Integer _
) As ULong

Visual Basic (使用法)

Dim value As Integer
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    int value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    int value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    int value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : int
) : ulong

パラメータ

value: 32 ビット符号付き整数。

戻り値
value と等価な 64 ビット符号なし整数。

例外

例外の種類	条件
OverflowException	value が 0 未満です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Char)

指定した Unicode 文字の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Char _
) As ULong

Visual Basic (使用法)

Dim value As Char
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    char value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    wchar_t value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    char value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : char
) : ulong

パラメータ

value: Unicode 文字。

戻り値
value と等価な 64 ビット符号なし整数。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

Convert.ToUInt64 メソッド (Single)

指定した単精度浮動小数点数の値を等価の 64 ビット符号なし整数に変換します。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As Single _
) As ULong

Visual Basic (使用法)

Dim value As Single
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    float value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    float value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    float value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : float
) : ulong

パラメータ

value: 単精度浮動小数点数。

例外

例外の種類	条件
OverflowException	value が 0 未満の値か、UInt64.MaxValue より大きい値です。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間
Single
System.Math.Round

Convert.ToUInt64 メソッド (DateTime)

このメソッドを呼び出すと、必ず InvalidCastException がスローされます。

このメソッドは、CLS に準拠していません。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<CLSCompliantAttribute(False)> _
Public Shared Function ToUInt64
 ( _
    value As DateTime _
) As ULong

Visual Basic (使用法)

Dim value As DateTime
Dim returnValue As ULong

returnValue = Convert.ToUInt64(value)

[CLSCompliantAttribute(false)] 
public static ulong ToUInt64 (
    DateTime value
)

C++

[CLSCompliantAttribute(false)] 
public:
static usigned long long ToUInt64 (
    DateTime value
)

/** @attribute CLSCompliantAttribute(false) */ 
public static UInt64 ToUInt64 (
    DateTime value
)

JScript

CLSCompliantAttribute(false) 
public static function ToUInt64
 (
    value : DateTime
) : ulong

パラメータ

value: DateTime。

戻り値
この変換はサポートされていません。値は返されません。

例外

例外の種類	条件
InvalidCastException	この変換はサポートされていません。

解説

このメソッドは、今後使用するために予約されています。

プラットフォーム

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
Convert クラス
Convert メンバ
System 名前空間

このページでは「.NET Framework クラスライブラリリファレンス」からConvert.ToUInt64を検索した結果を表示しています。
Weblioに収録されているすべての辞書からConvert.ToUInt64を検索する場合は、下記のリンクをクリックしてください。

全ての辞書からConvert.ToUInt64 を検索

>> 「Convert.ToUInt64」を含む用語の索引
Convert.ToUInt64のページへのリンク

Convert.ToUInt64とは？わかりやすく解説

Convert.ToUInt64 メソッド (Object)

Convert.ToUInt64 メソッド (Double)

Convert.ToUInt64 メソッド (Boolean)

Convert.ToUInt64 メソッド (UInt32)

Convert.ToUInt64 メソッド (String)

Convert.ToUInt64 メソッド (SByte)

Convert.ToUInt64 メソッド (UInt16)

Convert.ToUInt64 メソッド (Int64)

Convert.ToUInt64 メソッド (Object, IFormatProvider)

Convert.ToUInt64 メソッド

関連項目

Convert.ToUInt64 メソッド (Decimal)

Convert.ToUInt64 メソッド (String, Int32)

Convert.ToUInt64 メソッド (String, IFormatProvider)

Convert.ToUInt64 メソッド (Byte)

Convert.ToUInt64 メソッド (UInt64)

Convert.ToUInt64 メソッド (Int16)

Convert.ToUInt64 メソッド (Int32)

Convert.ToUInt64 メソッド (Char)

Convert.ToUInt64 メソッド (Single)

Convert.ToUInt64 メソッド (DateTime)

「Convert.ToUInt64」の関連用語


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Convert.ToUInt64とは？ わかりやすく解説

Convert.ToUInt64 メソッド (Object)

Convert.ToUInt64 メソッド (Double)

Convert.ToUInt64 メソッド (Boolean)

Convert.ToUInt64 メソッド (UInt32)

Convert.ToUInt64 メソッド (String)

Convert.ToUInt64 メソッド (SByte)

Convert.ToUInt64 メソッド (UInt16)

Convert.ToUInt64 メソッド (Int64)

Convert.ToUInt64 メソッド (Object, IFormatProvider)

Convert.ToUInt64 メソッド

関連項目

Convert.ToUInt64 メソッド (Decimal)

Convert.ToUInt64 メソッド (String, Int32)

Convert.ToUInt64 メソッド (String, IFormatProvider)

Convert.ToUInt64 メソッド (Byte)

Convert.ToUInt64 メソッド (UInt64)

Convert.ToUInt64 メソッド (Int16)

Convert.ToUInt64 メソッド (Int32)

Convert.ToUInt64 メソッド (Char)

Convert.ToUInt64 メソッド (Single)

Convert.ToUInt64 メソッド (DateTime)

急上昇のことば

「Convert.ToUInt64」の関連用語

Convert.ToUInt64とは？わかりやすく解説