AppDomain.DoCallBack 方法

  • 项目

在另一个应用程序域中执行代码，该应用程序域由指定的委托标识。

**命名空间:**System
**程序集:**mscorlib（在 mscorlib.dll 中）

语法

声明
Public Sub DoCallBack ( _
    callBackDelegate As CrossAppDomainDelegate _
)
用法
Dim instance As AppDomain
Dim callBackDelegate As CrossAppDomainDelegate

instance.DoCallBack(callBackDelegate)

public void DoCallBack (
    CrossAppDomainDelegate callBackDelegate
)

public:
virtual void DoCallBack (
    CrossAppDomainDelegate^ callBackDelegate
) sealed

public final void DoCallBack (
    CrossAppDomainDelegate callBackDelegate
)

public final function DoCallBack (
    callBackDelegate : CrossAppDomainDelegate
)

参数

  • callBackDelegate
    指定要调用的方法的委托。

备注

callBackDelegate 可指定按值封送、MarshalByRefObject 或 ContextBoundObject。

示例

下面的示例演示如何使用静态 DoCallBack 方法。

Public Module PingPong

   Private greetings As String = "PONG!"
   
   Sub Main()
      Dim currentDomain As AppDomain = AppDomain.CurrentDomain
      Dim otherDomain As AppDomain = AppDomain.CreateDomain("otherDomain")
      
      greetings = "PING!"

      MyCallBack()
      otherDomain.DoCallBack(AddressOf MyCallBack)

      ' Output:
      '   PING! from default domain
      '   PONG! from otherDomain
   End Sub 'Main
   
   Sub MyCallBack()
      Dim name As String = AppDomain.CurrentDomain.FriendlyName
      Console.WriteLine(greetings + " from " + name)
   End Sub 'MyCallBack

End Module 'PingPong

static string greetings = "PONG!";

public static void Main() {
   AppDomain currentDomain = AppDomain.CurrentDomain;
   AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");

   greetings = "PING!";

   MyCallBack();
   otherDomain.DoCallBack(new CrossAppDomainDelegate(MyCallBack));

   // Output:
   //   PING! from default domain
   //   PONG! from otherDomain
}

static public void MyCallBack() {
   string name = AppDomain.CurrentDomain.FriendlyName;
   Console.WriteLine(greetings + " from " + name);
}

public ref class PingPong
{
private:
   static String^ greetings = "PONG!";

public:
   static void MyCallBack()
   {
      String^ name = AppDomain::CurrentDomain->FriendlyName;
      Console::WriteLine(  "{0} from {1}", greetings, name );
   }

   static void Ping()
   {
      AppDomain^ currentDomain = AppDomain::CurrentDomain;
      AppDomain^ otherDomain = AppDomain::CreateDomain( "otherDomain" );
      greetings = "PING!";
      MyCallBack();
      otherDomain->DoCallBack( gcnew CrossAppDomainDelegate( MyCallBack ) );
      
      // Output:
      //   PING! from default domain
      //   PONG! from otherDomain
   }

};

int main()
{
   PingPong::Ping();
}

private static String greetings = "PONG!";

public static void main(String[] args)
{
    AppDomain currentDomain = AppDomain.get_CurrentDomain();
    AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");
    greetings = "PING!";
    MyCallBack();
    otherDomain.DoCallBack(new CrossAppDomainDelegate(MyCallBack));
    // Output:
    // PING! from default domain
    // PONG! from otherDomain
} //main
   
public static void MyCallBack()
{
    String name = AppDomain.get_CurrentDomain().get_FriendlyName();
    Console.WriteLine(greetings + " from " + name);
} //MyCallBack

下面的示例演示如何通过值使用 DoCallBack 方法。

<Serializable> _
Public Class PingPong

   Private greetings As String = "PING!"
   
   Public Shared Sub Main()
      Dim currentDomain As AppDomain = AppDomain.CurrentDomain
      Dim otherDomain As AppDomain = AppDomain.CreateDomain("otherDomain")
      
      Dim pp As New PingPong()
      pp.MyCallBack()
      pp.greetings = "PONG!"
      otherDomain.DoCallBack(AddressOf pp.MyCallBack)

      ' Output:
      '   PING! from default domain
      '   PONG! from otherDomain
   End Sub 'Main
   
   Public Sub MyCallBack()
      Dim name As String = AppDomain.CurrentDomain.FriendlyName
      Console.WriteLine(greetings + " from " + name)
   End Sub 'MyCallBack

End Class 'PingPong

[Serializable]
public class PingPong {
   private string greetings = "PING!";
   
   public static void Main() {
      AppDomain currentDomain = AppDomain.CurrentDomain;
      AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");

      PingPong pp = new PingPong();
      pp.MyCallBack();
      pp.greetings = "PONG!";
      otherDomain.DoCallBack(new CrossAppDomainDelegate(pp.MyCallBack));

      // Output:
      //   PING! from default domain
      //   PONG! from otherDomain
   }
   
   public void MyCallBack() {
      string name = AppDomain.CurrentDomain.FriendlyName;
      Console.WriteLine(greetings + " from " + name);
   }
}

[Serializable]
public ref class PingPong
{
private:
   String^ greetings;

public:
   PingPong()
   {
      greetings = "PING!";
   }

   void MyCallBack()
   {
      String^ name = AppDomain::CurrentDomain->FriendlyName;
      Console::WriteLine(  "{0} from {1}", greetings, name );
   }

   static void Ping()
   {
      AppDomain^ currentDomain = AppDomain::CurrentDomain;
      AppDomain^ otherDomain = AppDomain::CreateDomain( "otherDomain" );
      PingPong^ pp = gcnew PingPong;
      pp->MyCallBack();
      pp->greetings = "PONG!";
      otherDomain->DoCallBack( gcnew CrossAppDomainDelegate( pp, &PingPong::MyCallBack ) );
      
      // Output:
      //   PING! from default domain
      //   PONG! from otherDomain
   }

};

int main()
{
   PingPong::Ping();
}

/** @attribute Serializable()
 */
public class PingPong
{
    private String greetings = "PING!";

    public static void main(String[] args)
    {
        AppDomain currentDomain = AppDomain.get_CurrentDomain();
        AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");
        PingPong pp = new PingPong();
        pp.MyCallBack();
        pp.greetings = "PONG!";
        otherDomain.DoCallBack(new CrossAppDomainDelegate(pp.MyCallBack));
        // Output:
        // PING! from default domain
        // PONG! from otherDomain
    } //main
   
    public void MyCallBack()
    {
        String name = AppDomain.get_CurrentDomain().get_FriendlyName();
        Console.WriteLine(greetings + " from " + name);
    } //MyCallBack
} //PingPong

下面的示例演示如何通过引用使用 DoCallBack 方法。

Public Class PingPong
   Inherits MarshalByRefObject

   Private greetings As String = "PING!"
   
   Public Shared Sub Main()
      Dim currentDomain As AppDomain = AppDomain.CurrentDomain
      Dim otherDomain As AppDomain = AppDomain.CreateDomain("otherDomain")
      
      Dim pp As New PingPong()
      otherDomain.DoCallBack(AddressOf pp.MyCallBack)
      pp.MyCallBack()

      ' Output:
      '   PING! from default domain
      '   PONG! from default domain
   End Sub 'Main
   
   Public Sub MyCallBack()
      Dim name As String = AppDomain.CurrentDomain.FriendlyName
      Console.WriteLine((greetings + " from " + name))
      greetings = "PONG!"
   End Sub 'MyCallBack

End Class 'PingPong

public class PingPong : MarshalByRefObject {
   private string greetings = "PING!";
   
   public static void Main() {
      AppDomain currentDomain = AppDomain.CurrentDomain;
      AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");

      PingPong pp = new PingPong();
      otherDomain.DoCallBack(new CrossAppDomainDelegate(pp.MyCallBack));
      pp.MyCallBack();


      // Output:
      //   PING! from default domain
      //   PONG! from default domain
   }
   
   public void MyCallBack() {
      string name = AppDomain.CurrentDomain.FriendlyName;
      Console.WriteLine(greetings + " from " + name);
      greetings = "PONG!";
   }
}

public ref class PingPong: public MarshalByRefObject
{
private:
   String^ greetings;

public:
   PingPong()
   {
      greetings = "PING!";
   }

   void MyCallBack()
   {
      String^ name = AppDomain::CurrentDomain->FriendlyName;
      Console::WriteLine( "{0} from {1}", greetings, name );
      greetings = "PONG!";
   }

   static void Ping()
   {
      AppDomain^ currentDomain = AppDomain::CurrentDomain;
      AppDomain^ otherDomain = AppDomain::CreateDomain( "otherDomain" );
      PingPong^ pp = gcnew PingPong;
      otherDomain->DoCallBack( gcnew CrossAppDomainDelegate( pp, &PingPong::MyCallBack ) );
      pp->MyCallBack();
      
      // Output:
      //   PING! from default domain
      //   PONG! from default domain
   }

};

int main()
{
   PingPong::Ping();
}

public class PingPong extends MarshalByRefObject
{
    private String greetings = "PING!";

    public static void main(String[] args)
    {
        AppDomain currentDomain = AppDomain.get_CurrentDomain();
        AppDomain otherDomain = AppDomain.CreateDomain("otherDomain");
        PingPong pp = new PingPong();
        otherDomain.DoCallBack(new CrossAppDomainDelegate(pp.MyCallBack));
        pp.MyCallBack();
        // Output:
        // PING! from default domain
        // PONG! from default domain
    } //main
    
    public void MyCallBack()
    {
        String name = AppDomain.get_CurrentDomain().get_FriendlyName();
        Console.WriteLine(greetings + " from " + name);
        greetings = "PONG!";
    } //MyCallBack
} //PingPong

平台

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

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

AppDomain 类
AppDomain 成员
System 命名空间