RealProxy.Invoke(IMessage) 方法

定義

命名空間:

System.Runtime.Remoting.Proxies

組件:

mscorlib.dll

當在衍生類別中覆寫時，會呼叫所提供的 IMessage 方法，該方法對目前實例所代表的遠端物件進行調用。

public:
 abstract System::Runtime::Remoting::Messaging::IMessage ^ Invoke(System::Runtime::Remoting::Messaging::IMessage ^ msg);

public abstract System.Runtime.Remoting.Messaging.IMessage Invoke(System.Runtime.Remoting.Messaging.IMessage msg);

abstract member Invoke : System.Runtime.Remoting.Messaging.IMessage -> System.Runtime.Remoting.Messaging.IMessage

Public MustOverride Function Invoke (msg As IMessage) As IMessage

參數

msg

IMessage

IMessage A 包含 a IDictionary 或 關於方法呼叫的資訊。

傳回

IMessage

由被呼叫方法回傳的訊息，包含回傳值及任意 out 或 ref 參數。

範例

virtual IMessage^ Invoke( IMessage^ myMessage ) override
{
   Console::WriteLine( "MyProxy 'Invoke method' Called..." );
   if ( dynamic_cast<IMethodCallMessage^>(myMessage) )
   {
      Console::WriteLine( "IMethodCallMessage*" );
   }

   if ( dynamic_cast<IMethodReturnMessage^>(myMessage) )
   {
      Console::WriteLine( "IMethodReturnMessage*" );
   }

   if ( dynamic_cast<IConstructionCallMessage^>(myMessage) )
   {
      // Initialize a new instance of remote object
      IConstructionReturnMessage^ myIConstructionReturnMessage = this->InitializeServerObject( static_cast<IConstructionCallMessage^>(myMessage) );
      ConstructionResponse^ constructionResponse = gcnew ConstructionResponse( nullptr,static_cast<IMethodCallMessage^>(myMessage) );
      return constructionResponse;
   }

   IDictionary^ myIDictionary = myMessage->Properties;
   IMessage^ returnMessage;
   myIDictionary[ "__Uri" ] = myUri;

   // Synchronously dispatch messages to server.
   returnMessage = ChannelServices::SyncDispatchMessage( myMessage );

   // Pushing return value and OUT parameters back onto stack.
   IMethodReturnMessage^ myMethodReturnMessage = dynamic_cast<IMethodReturnMessage^>(returnMessage);
   return returnMessage;
}

public override IMessage Invoke(IMessage myMessage)
{
   Console.WriteLine("MyProxy 'Invoke method' Called...");
   if (myMessage is IMethodCallMessage)
   {
      Console.WriteLine("IMethodCallMessage");
   }
   if (myMessage is IMethodReturnMessage)
   {
      Console.WriteLine("IMethodReturnMessage");
   }
   if (myMessage is IConstructionCallMessage)
   {
      // Initialize a new instance of remote object
      IConstructionReturnMessage myIConstructionReturnMessage =
         this.InitializeServerObject((IConstructionCallMessage)myMessage);
      ConstructionResponse constructionResponse = new
         ConstructionResponse(null,(IMethodCallMessage) myMessage);
      return constructionResponse;
   }
   IDictionary myIDictionary = myMessage.Properties;
   IMessage returnMessage;
   myIDictionary["__Uri"] = myUri;

   // Synchronously dispatch messages to server.
   returnMessage = ChannelServices.SyncDispatchMessage(myMessage);
   // Pushing return value and OUT parameters back onto stack.
   IMethodReturnMessage myMethodReturnMessage = (IMethodReturnMessage)returnMessage;
   return returnMessage;
}

Public Overrides Function Invoke(myMessage As IMessage) As IMessage
   Console.WriteLine("MyProxy 'Invoke method' Called...")
   If TypeOf myMessage Is IMethodCallMessage Then
      Console.WriteLine("IMethodCallMessage")
   End If
   If TypeOf myMessage Is IMethodReturnMessage Then
      Console.WriteLine("IMethodReturnMessage")
   End If
   If TypeOf myMessage Is IConstructionCallMessage Then
      ' Initialize a new instance of remote object
      Dim myIConstructionReturnMessage As IConstructionReturnMessage = _
            Me.InitializeServerObject(CType(myMessage, IConstructionCallMessage))
      Dim constructionResponse As _
            New ConstructionResponse(Nothing, CType(myMessage, IMethodCallMessage))
      Return constructionResponse
   End If
   Dim myIDictionary As IDictionary = myMessage.Properties
   Dim returnMessage As IMessage
   myIDictionary("__Uri") = myUri
   ' Synchronously dispatch messages to server.
   returnMessage = ChannelServices.SyncDispatchMessage(myMessage)
   ' Pushing return value and OUT parameters back onto stack.
   Dim myMethodReturnMessage As IMethodReturnMessage = _
         CType(returnMessage, IMethodReturnMessage)
   Return returnMessage
End Function 'Invoke

備註

當由 支援 RealProxy 的透明代理被呼叫時，它會將呼叫委派給該 Invoke 方法。 該Invoke方法將參數IMethodCallMessage中的msg訊息轉換為 ，並傳送給由目前實例RealProxy所代表的遠端物件。

參數 IMessage 透過屬性 IMessage.Properties 提供字典。 字典包含關於方法呼叫的名稱/值對資訊，例如被呼叫的方法名稱及其參數。