Type.IsArrayImpl メソッド

.NET Framework クラス ライブラリ リファレンス

Type.IsArrayImpl メソッド

派生クラスによってオーバーライドされるときに、IsArray プロパティを実装し、Type が配列かどうかを判断します。

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

Visual Basic (宣言)

Protected MustOverride Function
 IsArrayImpl As Boolean

Visual Basic (使用法)

Dim returnValue As Boolean

returnValue = Me.IsArrayImpl

C#

protected abstract bool IsArrayImpl ()

C++

protected:
virtual bool IsArrayImpl () abstract

J#

protected abstract boolean IsArrayImpl ()

JScript

protected abstract function IsArrayImpl ()
 : boolean

戻り値
Type が配列である場合は true。それ以外の場合は false。

解説

Array クラスのインスタンスは、配列ではなくオブジェクトであるため、false を返す必要があります。

使用例

MyTypeDelegator クラスの IsArrayImpl メソッドをオーバーライドし、変数が配列かどうかをチェックして、結果を表示する例を次に示します。

Visual Basic

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic
Public Class MyTypeDelegator
    Inherits TypeDelegator
    Public myElementType As String
 = Nothing
    Public myType As Type
    Public Sub New(ByVal
 myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub 'New
    ' Override IsArrayImpl().
    Protected Overrides Function
 IsArrayImpl() As Boolean
        ' Determine whether the type is an array.
        If myType.IsArray Then
            myElementType = "array"
            Return True
        End If
        ' Return false if the type is not an array.
        Return False
    End Function 'IsArrayImpl
End Class 'MyTypeDelegator

Public Class Type_IsArrayImpl
    Public Shared Sub Main()
        Try
            Dim myInt As Integer
 = 0
            ' Create an instance of an array element.
            Dim myArray(4) As Integer
            Dim myType As New
 MyTypeDelegator(myArray.GetType())
            Console.WriteLine(ControlChars.NewLine + "Determine
 whether the variable is an array." + ControlChars.NewLine)
            ' Determine whether 'myType' is an array type.  
            If myType.IsArray Then
                Console.WriteLine("The type of myArray is {0}.",
 myType.myElementType)
            Else
                Console.WriteLine("myArray is not an array.")
            End If
            myType = New MyTypeDelegator(myInt.GetType())
            ' Determine whether myType is an array type. 
            If myType.IsArray Then
                Console.WriteLine("The type of myInt is {0}.",
 myType.myElementType)
            Else
                Console.WriteLine("myInt is not an array.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub 'Main
End Class 'Type_IsArrayImpl

C#

using System;
using System.Reflection;
public class MyTypeDelegator : TypeDelegator
{
    public string myElementType = null;
    public Type myType;
    public MyTypeDelegator(Type myType) : base(myType)
    {
        this.myType = myType;
    }
    // Override IsArrayImpl().
    protected override bool IsArrayImpl()
    {
        // Determine whether the type is an array.
        if(myType.IsArray)
        {
            myElementType = "array";
            return true;
        }
        // Return false if the type is not an array.
        return false;  
    }
}
public class Type_IsArrayImpl
{
    public static void Main()
    {
        try
        {
            int myInt = 0 ; 
            // Create an instance of an array element.
            int[] myArray = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            Console.WriteLine("\nDetermine whether the variable is an array.\n");
            // Determine whether myType is an array type.  
            if( myType.IsArray)
                Console.WriteLine("The type of myArray is {0}.", myType.myElementType);
            else
                Console.WriteLine("myArray is not an array.");
            myType = new MyTypeDelegator(myInt.GetType());

            // Determine whether myType is an array type. 
            if( myType.IsArray)
                Console.WriteLine("The type of myInt is {0}.", myType.myElementType);
            else
                Console.WriteLine("myInt is not an array.");
        }
        catch( Exception e )
        {
            Console.WriteLine("Exception: {0}", e.Message );
        }
    }
}

C++

using namespace System;
using namespace System::Reflection;
public ref class MyTypeDelegator: public
 TypeDelegator
{
public:
   String^ myElementType;
   Type^ myType;
   MyTypeDelegator( Type^ myType )
      : TypeDelegator( myType )
   {
      this->myType = myType;
   }


protected:

   // Override IsArrayImpl().
   virtual bool IsArrayImpl() override
   {
      
      // Determine whether the type is an array.
      if ( myType->IsArray )
      {
         myElementType = "array";
         return true;
      }

      
      // Return false if the type is not an array.
      return false;
   }

};

int main()
{
   try
   {
      int myInt = 0;
      
      // Create an instance of an array element.
      array<Int32>^myArray = gcnew array<Int32>(5);
      MyTypeDelegator^ myType = gcnew MyTypeDelegator( myArray->GetType() );
      Console::WriteLine( "\nDetermine whether the variable is an array.\n"
 );
      
      // Determine whether myType is an array type.
      if ( myType->IsArray )
            Console::WriteLine( "The type of myArray is {0}.", myType->myElementType
 );
      else
            Console::WriteLine( "myArray is not an array." );
      myType = gcnew MyTypeDelegator( myInt.GetType() );
      
      // Determine whether myType is an array type.
      if ( myType->IsArray )
            Console::WriteLine( "The type of myInt is {0}.", myType->myElementType
 );
      else
            Console::WriteLine( "myInt is not an array." );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: {0}", e->Message );
   }

}

J#

import System.*;
import System.Reflection.*;

public class MyTypeDelegator extends TypeDelegator
{
    public String myElementType = null;
    public Type myType;

    public MyTypeDelegator(Type myType)
    {
        super(myType);
        this.myType = myType;
    } //MyTypeDelegator

    // Override IsArrayImpl().
    protected boolean IsArrayImpl()
    {
        // Determine whether the type is an array.
        if (myType.get_IsArray()) {
            myElementType = "array";
            return true;
        }
        // Return false if the type is not an array.
        return false;
    } //IsArrayImpl
} //MyTypeDelegator

public class Type_IsArrayImpl
{
    public static void main(String[]
 args)
    {
        try {
            int myInt = 0;
            // Create an instance of an array element.
            int myArray[] = new int[5];
            MyTypeDelegator myType = new MyTypeDelegator(myArray.GetType());
            Console.WriteLine("\nDetermine whether the variable is an array.\n");
            // Determine whether myType is an array type.  
            if (myType.get_IsArray()) {
                Console.WriteLine("The type of myArray is {0}.", myType.
                    myElementType);
            }
            else {
                Console.WriteLine("myArray is not an array.");
            }
            myType = new MyTypeDelegator(((System.Int32)myInt).GetType());
            // Determine whether myType is an array type. 
            if (myType.get_IsArray()) {
                Console.WriteLine("The type of myInt is {0}.", myType.
                    myElementType);
            }
            else {
                Console.WriteLine("myInt is not an array.");
            }
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception: {0}", e.get_Message());
        }
    } //main
} //Type_IsArrayImpl

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
Type クラス
Type メンバ
System 名前空間
IsArray