BitArray.CopyTo メソッドとは何？わかりやすく解説 Weblio辞書

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BitArray.CopyTo メソッド

BitArray 全体を互換性のある 1 次元の Array にコピーします。コピー操作は、コピー先の配列の指定したインデックスから始まります。

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

Visual Basic (宣言)

Public Sub CopyTo ( _
    array As Array, _
    index As Integer _
)

Visual Basic (使用法)

Dim instance As BitArray
Dim array As Array
Dim index As Integer

instance.CopyTo(array, index)

public void CopyTo (
    Array array,
    int index
)

C++

public:
virtual void CopyTo (
    Array^ array, 
    int index
) sealed

public final void CopyTo (
    Array array, 
    int index
)

JScript

public final function CopyTo (
    array : Array, 
    index : int
)

パラメータ

array: BitArray から要素がコピーされる 1 次元の Array。Array には、0 から始まるインデックス番号が必要です。

index: コピーの開始位置となる、array の 0 から始まるインデックス番号。

例外

例外の種類	条件
ArgumentNullException	array が null 参照 (Visual Basic では Nothing) です。
ArgumentOutOfRangeException	index が 0 未満です。
ArgumentException	array が多次元です。または index が array の長さ以上です。またはコピー元の BitArray の要素数が、index からコピー先の array の末尾までに格納できる数を超えています。
InvalidCastException	コピー元の BitArray の型が、コピー先の array の型に自動的にキャストできません。

解説

互換性のある型の配列を指定する必要があります。サポートされている配列型は、bool、int、および byte だけです。

このメソッドは、Array.Copy を使用して要素をコピーします。

このメソッドは O(n) 操作です。ここで、n は Count です。

使用例

BitArray を 1 次元の Array にコピーする方法を次のコード例に示します。

Visual Basic

Imports System
Imports System.Collections

Public Class SamplesBitArray

    Public Shared Sub Main()

        ' Creates and initializes the source BitArray.
        Dim myBA As New
 BitArray(4)
        myBA(0) = True
        myBA(1) = True
        myBA(2) = True
        myBA(3) = True

        ' Creates and initializes the one-dimensional target Array of
 type Boolean.
        Dim myBoolArray(7) As Boolean
        myBoolArray(0) = False
        myBoolArray(1) = False

        ' Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the
 following (before and after copying):")
        PrintValues(myBoolArray)

        ' Copies the entire source BitArray to the target BitArray,
 starting at index 3.
        myBA.CopyTo(myBoolArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myBoolArray)

        ' Creates and initializes the one-dimensional target Array of
 type integer.
        Dim myIntArray(7) As Integer
        myIntArray(0) = 42
        myIntArray(1) = 43

        ' Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the
 following (before and after copying):")
        PrintValues(myIntArray)

        ' Copies the entire source BitArray to the target BitArray,
 starting at index 3.
        myBA.CopyTo(myIntArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myIntArray)

        ' Creates and initializes the one-dimensional target Array of
 type integer.
        Dim myByteArray As Array = Array.CreateInstance(GetType(Byte),
 8)
        myByteArray.SetValue(System.Convert.ToByte(10), 0)
        myByteArray.SetValue(System.Convert.ToByte(11), 1)

        ' Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the
 following (before and after copying):")
        PrintValues(myByteArray)

        ' Copies the entire source BitArray to the target BitArray,
 starting at index 3.
        myBA.CopyTo(myByteArray, 3)

        ' Displays the values of the target Array.
        PrintValues(myByteArray)

        ' Returns an exception if the array is not of type Boolean,
 integer or byte.
        Try
            Dim myStringArray As Array = Array.CreateInstance(GetType(String),
 8)
            myStringArray.SetValue("Hello", 0)
            myStringArray.SetValue("World", 1)
            myBA.CopyTo(myStringArray, 3)
        Catch myException As Exception
            Console.WriteLine("Exception: " + myException.ToString())
        End Try

    End Sub 'Main

    Public Shared Sub PrintValues(myArr
 As IEnumerable)
        Dim obj As [Object]
        For Each obj In
  myArr
            Console.Write("{0,8}", obj)
        Next obj
        Console.WriteLine()
    End Sub 'PrintValues

End Class 'SamplesBitArray 


' This code produces the following output.
' 
' The target Boolean Array contains the following (before and after
 copying):
'    False   False   False   False   False   False   False   False
'    False   False   False    True    True    True    True   False
' The target Boolean Array contains the following (before and after
 copying):
'       42      43       0       0       0       0       0       0
'       42      43       0      15       0       0       0       0
' The target Boolean Array contains the following (before and after
 copying):
'       10      11       0       0       0       0       0       0
'       10      11       0      15       0       0       0       0
' Exception: System.ArgumentException: Only supported array types for
 CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
'    at System.Collections.BitArray.CopyTo(Array array, Int32 index)
'    at SamplesBitArray.Main()

using System;
using System.Collections;
public class SamplesBitArray  {

   public static void Main()
  {

      // Creates and initializes the source BitArray.
      BitArray myBA = new BitArray( 4 );
      myBA[0] = myBA[1] = myBA[2] = myBA[3] = true;

      // Creates and initializes the one-dimensional target Array of
 type Boolean.
      bool[] myBoolArray = new bool[8];
      myBoolArray[0] = false;
      myBoolArray[1] = false;

      // Displays the values of the target Array.
      Console.WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
      PrintValues( myBoolArray );

      // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
      myBA.CopyTo( myBoolArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myBoolArray );

      // Creates and initializes the one-dimensional target Array of
 type integer.
      int[] myIntArray = new int[8];
      myIntArray[0] = 42;
      myIntArray[1] = 43;

      // Displays the values of the target Array.
      Console.WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
      PrintValues( myIntArray );

      // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
      myBA.CopyTo( myIntArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myIntArray );

      // Creates and initializes the one-dimensional target Array of
 type integer.
      Array myByteArray = Array.CreateInstance( typeof(byte), 8 );
      myByteArray.SetValue( (byte) 10, 0 );
      myByteArray.SetValue( (byte) 11, 1 );

      // Displays the values of the target Array.
      Console.WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
      PrintValues( myByteArray );

      // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
      myBA.CopyTo( myByteArray, 3 );

      // Displays the values of the target Array.
      PrintValues( myByteArray );

      // Returns an exception if the array is not of type Boolean, integer
 or byte.
      try  {
         Array myStringArray=Array.CreateInstance( typeof(String), 8 );
         myStringArray.SetValue( "Hello", 0 );
         myStringArray.SetValue( "World", 1 );
         myBA.CopyTo( myStringArray, 3 );
      } catch ( Exception myException )  {
         Console.WriteLine("Exception: " + myException.ToString());
      }
   }

   public static void PrintValues(
 IEnumerable myArr )  {
      foreach ( Object obj in myArr ) {
         Console.Write( "{0,8}", obj );
      }
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

The target Boolean Array contains the following (before and after copying):
   False   False   False   False   False   False   False   False
   False   False   False    True    True    True    True   False
The target Boolean Array contains the following (before and after copying):
      42      43       0       0       0       0       0       0
      42      43       0      15       0       0       0       0
The target Boolean Array contains the following (before and after copying):
      10      11       0       0       0       0       0       0
      10      11       0      15       0       0       0       0
Exception: System.ArgumentException: Only supported array types for
 CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
   at System.Collections.BitArray.CopyTo(Array array, Int32 index)
   at SamplesBitArray.Main()

*/

C++

using namespace System;
using namespace System::Collections;
void PrintValues( IEnumerable^ myArr );
int main()
{
   // Creates and initializes the source BitArray.
   BitArray^ myBA = gcnew BitArray( 4 );
   myBA[ 0 ] = true;
   myBA[ 1 ] = true;
   myBA[ 2 ] = true;
   myBA[ 3 ] = true;

   // Creates and initializes the one-dimensional target Array of type
 Boolean.
   array<Boolean>^myBoolArray = gcnew array<Boolean>(8);
   myBoolArray[ 0 ] = false;
   myBoolArray[ 1 ] = false;

   // Displays the values of the target Array.
   Console::WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
   PrintValues( dynamic_cast<IEnumerable^>(myBoolArray) );

   // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
   myBA->CopyTo( myBoolArray, 3 );

   // Displays the values of the target Array.
   PrintValues( dynamic_cast<IEnumerable^>(myBoolArray) );

   // Creates and initializes the one-dimensional target Array of type
 integer.
   array<Int32>^myIntArray = gcnew array<Int32>(8);
   myIntArray[ 0 ] = 42;
   myIntArray[ 1 ] = 43;

   // Displays the values of the target Array.
   Console::WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
   PrintValues( dynamic_cast<IEnumerable^>(myIntArray) );

   // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
   myBA->CopyTo( myIntArray, 3 );

   // Displays the values of the target Array.
   PrintValues( dynamic_cast<IEnumerable^>(myIntArray) );

   // Creates and initializes the one-dimensional target Array of type
 integer.
   Array^ myByteArray = Array::CreateInstance( Byte::typeid, 8 );
   myByteArray->SetValue( (Byte)10, 0 );
   myByteArray->SetValue( (Byte)11, 1 );

   // Displays the values of the target Array.
   Console::WriteLine( "The target Boolean Array contains the following (before
 and after copying):" );
   PrintValues( myByteArray );

   // Copies the entire source BitArray to the target BitArray, starting
 at index 3.
   myBA->CopyTo( myByteArray, 3 );

   // Displays the values of the target Array.
   PrintValues( myByteArray );

   // Returns an exception if the array is not of type Boolean, integer
 or byte.
   try
   {
      Array^ myStringArray = Array::CreateInstance( String::typeid, 8 );
      myStringArray->SetValue( "Hello", 0 );
      myStringArray->SetValue( "World", 1 );
      myBA->CopyTo( myStringArray, 3 );
   }
   catch ( Exception^ myException ) 
   {
      Console::WriteLine( "Exception: {0}", myException );
   }

}

void PrintValues( IEnumerable^ myArr )
{
   IEnumerator^ myEnum = myArr->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Object^ obj = safe_cast<Object^>(myEnum->Current);
      Console::Write( "{0,8}", obj );
   }

   Console::WriteLine();
}

/* 
 This code produces the following output.
 
 The target Boolean Array contains the following (before and after copying):
    False   False   False   False   False   False   False   False
    False   False   False    True    True    True    True   False
 The target Boolean Array contains the following (before and after copying):
       42      43       0       0       0       0       0       0
       42      43       0      15       0       0       0       0
 The target Boolean Array contains the following (before and after copying):
       10      11       0       0       0       0       0       0
       10      11       0      15       0       0       0       0
 Exception: System.ArgumentException: Only supported array types for
 CopyTo on BitArrays are Boolean[], Int32[] and Byte[].
    at System.Collections.BitArray.CopyTo(Array array, Int32 index)
    at SamplesBitArray.Main()

 */

import System.*;
import System.Collections.*;

public class SamplesBitArray
{
    public static void main(String[]
 args)
    {
        // Creates and initializes the source BitArray.
        BitArray myBA = new BitArray(4);

        myBA.set_Item(0, true);
        myBA.set_Item(1, true);
        myBA.set_Item(2, true);
        myBA.set_Item(3, true);

        // Creates and initializes the one-dimensional target Array
 of 
        // type Boolean.
        boolean myBoolArray[] = new boolean[8];
        myBoolArray[0] = false;
        myBoolArray[1] = false;

        // Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the following"
            + " (before and after copying):");
        PrintValues(myBoolArray);

        // Copies the entire source BitArray to the target BitArray,
 starting 
        // at index 3.
        myBA.CopyTo(myBoolArray, 3);

        // Displays the values of the target Array.
        PrintValues(myBoolArray);

        // Creates and initializes the one-dimensional target Array
 of type 
        // integer.
        int myIntArray[] = new int[8];
        myIntArray[0] = 42;
        myIntArray[1] = 43;

        // Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the following"
            + " (before and after copying):");
        PrintValues(myIntArray);

        // Copies the entire source BitArray to the target BitArray,
 starting 
        // at index 3.
        myBA.CopyTo(myIntArray, 3);

        // Displays the values of the target Array.
        PrintValues(myIntArray);

        // Creates and initializes the one-dimensional target Array
 of 
        // type integer.
        Array myByteArray = Array.CreateInstance(ubyte.class.ToType(),
 8);
        myByteArray.SetValue((System.Byte)(10), 0);
        myByteArray.SetValue((System.Byte)(11), 1);

        // Displays the values of the target Array.
        Console.WriteLine("The target Boolean Array contains the following"
            + " (before and after copying):");
        PrintValues(myByteArray);

        // Copies the entire source BitArray to the target BitArray,
 starting
        // at index 3.
        myBA.CopyTo(myByteArray, 3);

        // Displays the values of the target Array.
        PrintValues(myByteArray);

        // Returns an exception if the array is not of type Boolean,
 integer
        // or byte.
        try {
            Array myStringArray = Array.CreateInstance(String.class.ToType()
,8);
            myStringArray.SetValue("Hello", 0);
            myStringArray.SetValue("World", 1);
            myBA.CopyTo(myStringArray, 3);
        }
        catch (System.Exception myException) {
            Console.WriteLine(("Exception: " + myException.ToString()));
        }
    } //main

    public static void PrintValues(IEnumerable
 myArr)
    {
        IEnumerator objMyEnum = myArr.GetEnumerator();
        while (objMyEnum.MoveNext()) {
            Object obj = objMyEnum.get_Current();
            Console.Write("{0,8}", obj);
        }
        Console.WriteLine();
    } //PrintValues
}//SamplesBitArray 

/* 
 This code produces the following output.
 
 The target Boolean Array contains the following (before and after copying):
    False   False   False   False   False   False   False   False
    False   False   False    True    True    True    True   False
 The target Boolean Array contains the following (before and after copying):
       42      43       0       0       0       0       0       0
       42      43       0      15       0       0       0       0
 The target Boolean Array contains the following (before and after copying):
       10      11       0       0       0       0       0       0
       10      11       0      15       0       0       0       0
 Exception: System.ArgumentException: Only supported array types for
 CopyTo on
 BitArrays are Boolean[], Int32[] and Byte[].
    at System.Collections.BitArray.CopyTo(Array array, Int32 index)
    at SamplesBitArray.main(String[] args)

 */

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
BitArray クラス
BitArray メンバ
System.Collections 名前空間
Array クラス

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BitArray.CopyTo メソッドとは？ わかりやすく解説

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BitArray.CopyTo メソッドとは？わかりやすく解説