Type.IsContextfulImpl メソッド

.NET Framework クラス ライブラリ リファレンス

Type.IsContextfulImpl メソッド

IsContextful プロパティを実装し、Type をコンテキスト内で管理できる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 Overridable Function
 IsContextfulImpl As Boolean

Visual Basic (使用法)

Dim returnValue As Boolean

returnValue = Me.IsContextfulImpl

C#

protected virtual bool IsContextfulImpl ()

C++

protected:
virtual bool IsContextfulImpl ()

J#

protected boolean IsContextfulImpl ()

JScript

protected function IsContextfulImpl () : boolean

戻り値
Type をコンテキスト内でホストできる場合は true。それ以外の場合は false。

解説

このメソッドは、派生クラスでオーバーライドできます。

コンテキストは、クラス メンバに対する呼び出しを受け取り、クラスに適用される同期などのポリシーを強制的に実行します。

使用例

IsContextfulImpl メソッドを使用する例を次に示します。

Visual Basic

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic
Public Class MyTypeDelegatorClass
    Inherits TypeDelegator
    Public myElementType As String
 = Nothing
    Private myType As Type = Nothing
    Public Sub New(ByVal
 myType As Type)
        MyBase.New(myType)
        Me.myType = myType
    End Sub 'New
    ' Override IsContextfulImpl.
    Protected Overrides Function
 IsContextfulImpl() As Boolean
        ' Check whether the type is contextful.
        If myType.IsContextful Then
            myElementType = " is contextful "
            Return True
        End If
        Return False
    End Function 'IsContextfulImpl
End Class 'MyTypeDelegatorClass
Public Class MyTypeDemoClass
    Public Shared Sub Main()
        Try
            Dim myType As MyTypeDelegatorClass
            Console.WriteLine("Check whether MyContextBoundClass
 can be hosted in a context.")
            ' Check whether MyContextBoundClass is contextful.
            myType = New MyTypeDelegatorClass(GetType(MyContextBoundClass))
            If myType.IsContextful Then
                Console.WriteLine(GetType(MyContextBoundClass).ToString()
 + " can be hosted in a context.")
            Else
                Console.WriteLine(GetType(MyContextBoundClass).ToString()
 + " cannot be hosted in a context.")
            End If
            ' Check whether the int type is contextful.
            myType = New MyTypeDelegatorClass(GetType(MyTypeDemoClass))
            Console.WriteLine(ControlChars.NewLine + "Check whether
 MyTypeDemoClass can be hosted in a context.")
            If myType.IsContextful Then
                Console.WriteLine(GetType(MyTypeDemoClass).ToString()
 + " can be hosted in a context.")
            Else
                Console.WriteLine(GetType(MyTypeDemoClass).ToString()
 + " cannot be hosted in a context.")
            End If
        Catch e As Exception
            Console.WriteLine("Exception: {0}", e.Message.ToString())
        End Try
    End Sub 'Main
End Class 'MyTypeDemoClass
' This class demonstrates the IsContextfulImpl method.
Public Class MyContextBoundClass
    Inherits ContextBoundObject
    Public myString As String
 = "This class is used to demonstrate members of the Type class."
End Class 'MyContextBoundClass

C#

using System;
using System.Reflection;
public class MyTypeDelegatorClass : TypeDelegator
{
    public string myElementType = null;
    private Type myType = null ; 

    public MyTypeDelegatorClass(Type myType) : base(myType)
    {
        this.myType = myType;
    }
    // Override IsContextfulImpl.
    protected override bool IsContextfulImpl()
    {
        // Check whether the type is contextful.
        if(myType.IsContextful)
        { 
            myElementType = " is contextful ";
            return true;
        }
        return false;
    }
}
public class MyTypeDemoClass
{
    public static void Main()
    {
        try
        {
            MyTypeDelegatorClass myType;
            Console.WriteLine ("Check whether MyContextBoundClass can be hosted
 in a context.");
            // Check whether MyContextBoundClass is contextful.
            myType = new MyTypeDelegatorClass(typeof(MyContextBoundClass));
            if( myType.IsContextful)
            {
                Console.WriteLine(typeof(MyContextBoundClass) + " can be hosted
 in a context.");
            }
            else
            {
                Console.WriteLine(typeof(MyContextBoundClass) + " cannot be
 hosted in a context.");
            }
            // Check whether the int type is contextful.
            myType = new MyTypeDelegatorClass(typeof(MyTypeDemoClass));
            Console.WriteLine ("\nCheck whether MyTypeDemoClass can be hosted
 in a context.");
            if( myType.IsContextful)
            {
                Console.WriteLine(typeof(MyTypeDemoClass) + " can be hosted
 in a context.");
            }
            else
            {
                Console.WriteLine(typeof(MyTypeDemoClass) + " cannot be hosted
 in a context.");
            }
        }
        catch( Exception e )
        {
            Console.WriteLine("Exception: {0}", e.Message);
        }
    }
}
// This class demonstrates IsContextfulImpl.
public class MyContextBoundClass : ContextBoundObject
{
    public string myString = "This class
 is used to demonstrate members of the Type class.";
}

C++

using namespace System;
using namespace System::Reflection;

public ref class MyTypeDelegatorClass: public
 TypeDelegator
{
public:
   String^ myElementType;

private:
   Type^ myType;

public:
   MyTypeDelegatorClass( Type^ myType )
      : TypeDelegator( myType )
   {
      this->myType = myType;
   }

protected:

   // Override IsContextfulImpl.
   virtual bool IsContextfulImpl() override
   {
      
      // Check whether the type is contextful.
      if ( myType->IsContextful )
      {
         myElementType = " is contextful ";
         return true;
      }

      return false;
   }

};

public ref class MyTypeDemoClass{};


// This class demonstrates IsContextfulImpl.
public ref class MyContextBoundClass: public
 ContextBoundObject
{
public:
   String^ myString;
};

int main()
{
   try
   {
      MyTypeDelegatorClass^ myType;
      Console::WriteLine( "Check whether MyContextBoundClass can be hosted in
 a context." );
      
      // Check whether MyContextBoundClass is contextful.
      myType = gcnew MyTypeDelegatorClass( MyContextBoundClass::typeid );
      if ( myType->IsContextful )
      {
         Console::WriteLine( "{0} can be hosted in a context.",
 MyContextBoundClass::typeid );
      }
      else
      {
         Console::WriteLine( "{0} cannot be hosted in a context.",
 MyContextBoundClass::typeid );
      }
      myType = gcnew MyTypeDelegatorClass( MyTypeDemoClass::typeid );
      Console::WriteLine( "\nCheck whether MyTypeDemoClass can be hosted in
 a context." );
      if ( myType->IsContextful )
      {
         Console::WriteLine( "{0} can be hosted in a context.",
 MyTypeDemoClass::typeid );
      }
      else
      {
         Console::WriteLine( "{0} cannot be hosted in a context.",
 MyTypeDemoClass::typeid );
      }
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception: {0}", e->Message );
   }
}

J#

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

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

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

    // Override IsContextfulImpl.
    protected boolean IsContextfulImpl()
    {
        // Check whether the type is contextful.
        if (myType.get_IsContextful()) {
            myElementType = " is contextful ";
            return true;
        }
        return false;
    } //IsContextfulImpl
} //MyTypeDelegatorClass

public class MyTypeDemoClass
{
    public static void main(String[]
 args)
    {
        try {
            MyTypeDelegatorClass myType;
            Console.WriteLine("Check whether MyContextBoundClass can be hosted"
                + " in a context.");
            // Check whether MyContextBoundClass is contextful.
            myType = new MyTypeDelegatorClass(MyContextBoundClass.class.ToType());
            if (myType.get_IsContextful()) {
                Console.WriteLine(MyContextBoundClass.class.ToType()
 
                    + " can be hosted in a context.");
            }
            else {
                Console.WriteLine(MyContextBoundClass.class.ToType()
 
                    + " cannot be hosted in a context.");
            }
            // Check whether the int type is contextful.
            myType = new MyTypeDelegatorClass(MyTypeDemoClass.class.ToType());
            Console.WriteLine("\nCheck whether MyTypeDemoClass can be hosted"
 
                + " in a context.");
            if (myType.get_IsContextful()) {
                Console.WriteLine(MyTypeDemoClass.class.ToType()
 
                    + " can be hosted in a context.");
            }
            else {
                Console.WriteLine(MyTypeDemoClass.class.ToType()
 
                    + " cannot be hosted in a context.");
            }
        }
        catch (System.Exception e) {
            Console.WriteLine("Exception: {0}", e.get_Message());
        }
    } //main
} //MyTypeDemoClass

// This class demonstrates IsContextfulImpl.
public class MyContextBoundClass extends ContextBoundObject
{
    public String myString = "This class
 is used to demonstrate members of the" 
        + " Type class.";
} //MyContextBoundClass

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, 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

参照

関連項目
Type クラス
Type メンバ
System 名前空間
IsContextful