RemotingServices.ExecuteMessage Metod

Definition

Namnområde:: System.Runtime.Remoting

Sammansättning:: mscorlib.dll

Viktigt

En del information gäller för förhandsversionen av en produkt och kan komma att ändras avsevärt innan produkten blir allmänt tillgänglig. Microsoft lämnar inga garantier, uttryckliga eller underförstådda, avseende informationen som visas här.

Ansluter till det angivna fjärrobjektet och kör angivet IMethodCallMessage på det.

public:
 static System::Runtime::Remoting::Messaging::IMethodReturnMessage ^ ExecuteMessage(MarshalByRefObject ^ target, System::Runtime::Remoting::Messaging::IMethodCallMessage ^ reqMsg);

public static System.Runtime.Remoting.Messaging.IMethodReturnMessage ExecuteMessage(MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg);

[System.Security.SecurityCritical]
public static System.Runtime.Remoting.Messaging.IMethodReturnMessage ExecuteMessage(MarshalByRefObject target, System.Runtime.Remoting.Messaging.IMethodCallMessage reqMsg);

static member ExecuteMessage : MarshalByRefObject * System.Runtime.Remoting.Messaging.IMethodCallMessage -> System.Runtime.Remoting.Messaging.IMethodReturnMessage

[<System.Security.SecurityCritical>]
static member ExecuteMessage : MarshalByRefObject * System.Runtime.Remoting.Messaging.IMethodCallMessage -> System.Runtime.Remoting.Messaging.IMethodReturnMessage

Public Shared Function ExecuteMessage (target As MarshalByRefObject, reqMsg As IMethodCallMessage) As IMethodReturnMessage

Parametrar

target: MarshalByRefObject

Fjärrobjektet vars metod du vill anropa.

reqMsg: IMethodCallMessage

Ett metodanropsmeddelande till det angivna fjärrobjektets metod.

Returer

IMethodReturnMessage

Fjärrmetodens svar.

Attribut: SecurityCriticalAttribute

Undantag

SecurityException

Den omedelbara anroparen har inte infrastrukturbehörighet.

RemotingException

Metoden anropades från en annan kontext än objektets interna kontext.

Exempel

Följande kodexempel visar hur du använder ExecuteMessage metoden för att vidarebefordra metodanrop till fjärrobjekt.

[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand, 
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
virtual void ProcessMessageStart( IMessage^ requestMessage, bool /*bClientSide*/, bool /*bAsyncCall*/ )
{
   Console::WriteLine( "\nProcessMessageStart" );
   Console::WriteLine( "requestMessage = {0}", requestMessage );
   try
   {
      Console::WriteLine( "SessionId = {0}.", RemotingServices::GetSessionIdForMethodMessage( dynamic_cast<IMethodMessage^>(requestMessage) ) );
   }
   catch ( InvalidCastException^ ) 
   {
      Console::WriteLine( "The requestMessage is not an IMethodMessage*." );
   }

   IMethodCallMessage^ requestMethodCallMessage;
   try
   {
      requestMethodCallMessage = dynamic_cast<IMethodCallMessage^>(requestMessage);

      // Prints the details of the IMethodCallMessage* to the console.
      Console::WriteLine( "\nMethodCall details" );
      Console::WriteLine( "Uri = {0}", requestMethodCallMessage->Uri );
      Console::WriteLine( "TypeName = {0}", requestMethodCallMessage->TypeName );
      Console::WriteLine( "MethodName = {0}", requestMethodCallMessage->MethodName );
      Console::WriteLine( "ArgCount = {0}", requestMethodCallMessage->ArgCount );
      Console::WriteLine( "MethodCall::Args" );
      IEnumerator^ myEnum = requestMethodCallMessage->Args->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Object^ o = safe_cast<Object^>(myEnum->Current);
         Console::WriteLine( "\t {0}", o );

         // Sends this method call message to another server to replicate
         // the call at the second server.
         if ( requestMethodCallMessage->Uri == replicatedServiceUri )
         {
            String^ repSvr = String::Format(  "{0}{1}", const_cast<String^>(replicationServerUrl), const_cast<String^>(replicatedServiceUri) );
            SampleService^ replicationService = dynamic_cast<SampleService^>(Activator::GetObject( SampleService::typeid, repSvr ));
            IMethodReturnMessage^ returnMessage = RemotingServices::ExecuteMessage( replicationService, requestMethodCallMessage );

            // Prints the results of the method call stored in the IMethodReturnMessage*.
            Console::WriteLine( "\nMessage returned by ExecuteMessage." );
            Console::WriteLine( "\tException = {0}", returnMessage->Exception );
            Console::WriteLine( "\tReturnValue = {0}", returnMessage->ReturnValue );
            Console::WriteLine( "\tOutArgCount = {0}", returnMessage->OutArgCount );
            Console::WriteLine( "Return message OutArgs" );
            IEnumerator^ myEnum = requestMethodCallMessage->Args->GetEnumerator();
            while ( myEnum->MoveNext() )
            {
               Object^ o = safe_cast<Object^>(myEnum->Current);
               Console::WriteLine( "\t {0}", o );
            }
         }
      }
   }
   catch ( InvalidCastException^ ) 
   {
      Console::WriteLine( "The requestMessage is not a MethodCall" );
   }
}

public void ProcessMessageStart(IMessage requestMessage, bool bClientSide, bool bAsyncCall) {

   Console.WriteLine("\nProcessMessageStart");
   Console.WriteLine("requestMessage = {0}", requestMessage);

   try {
      Console.WriteLine("SessionId = {0}.",
          RemotingServices.GetSessionIdForMethodMessage((IMethodMessage)requestMessage));
   }
   catch (InvalidCastException) {
      Console.WriteLine("The requestMessage is not an IMethodMessage.");
   }

   IMethodCallMessage requestMethodCallMessage;

   try {
      requestMethodCallMessage = (IMethodCallMessage)requestMessage;
      // Prints the details of the IMethodCallMessage to the console.
      Console.WriteLine("\nMethodCall details");
      Console.WriteLine("Uri = {0}", requestMethodCallMessage.Uri);
      Console.WriteLine("TypeName = {0}", requestMethodCallMessage.TypeName);
      Console.WriteLine("MethodName = {0}", requestMethodCallMessage.MethodName);
      Console.WriteLine("ArgCount = {0}", requestMethodCallMessage.ArgCount);

      Console.WriteLine("MethodCall.Args");
      foreach(object o in requestMethodCallMessage.Args)
          Console.WriteLine("\t{0}", o);

      // Sends this method call message to another server to replicate
      // the call at the second server.
      if (requestMethodCallMessage.Uri == replicatedServiceUri) {

         SampleService replicationService =
            (SampleService)Activator.GetObject(typeof(SampleService),
            replicationServerUrl + replicatedServiceUri);

         IMethodReturnMessage returnMessage =
            RemotingServices.ExecuteMessage(replicationService, requestMethodCallMessage);

         // Prints the results of the method call stored in the IMethodReturnMessage.
         Console.WriteLine("\nMessage returned by ExecuteMessage.");
         Console.WriteLine("\tException = {0}", returnMessage.Exception);
         Console.WriteLine("\tReturnValue = {0}", returnMessage.ReturnValue);
         Console.WriteLine("\tOutArgCount = {0}", returnMessage.OutArgCount);
         Console.WriteLine("Return message OutArgs");

         foreach(object o in requestMethodCallMessage.Args)
            Console.WriteLine("\t{0}", o);
      }
   }
   catch (InvalidCastException) {
       Console.WriteLine("The requestMessage is not a MethodCall");
   }
}

<SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _
Public Sub ProcessMessageStart(requestMessage As IMessage, bClientSide As Boolean, bAsyncCall As Boolean) Implements IDynamicMessageSink.ProcessMessageStart

   Console.WriteLine(ControlChars.Cr + "ProcessMessageStart")
   Console.WriteLine("requestMessage = {0}", requestMessage)
   
   Try
      Console.WriteLine("SessionId = {0}.", RemotingServices.GetSessionIdForMethodMessage(CType(requestMessage, IMethodMessage)))
   Catch e As InvalidCastException
      Console.WriteLine("The requestMessage is not an IMethodMessage.")
   End Try
   
   Dim requestMethodCallMessage As IMethodCallMessage
   
   Try
      requestMethodCallMessage = CType(requestMessage, MethodCall)
      
      ' Prints the details of the IMethodCallMessage to the console
      Console.WriteLine(ControlChars.Cr + "MethodCall details")
      Console.WriteLine("Uri = {0}", requestMethodCallMessage.Uri)
      Console.WriteLine("TypeName = {0}", requestMethodCallMessage.TypeName)
      Console.WriteLine("MethodName = {0}", requestMethodCallMessage.MethodName)
      Console.WriteLine("ArgCount = {0}", requestMethodCallMessage.ArgCount)
      Console.WriteLine("MethodCall.Args")
      
      Dim o As Object
      For Each o In  requestMethodCallMessage.Args
         Console.WriteLine(ControlChars.Tab + "{0}", o)
      Next o 
      
      ' Sends this method call message to another server to replicate
      ' the call at the second server
      If requestMethodCallMessage.Uri = replicatedServiceUri Then
         
         Dim replicationService As SampleService = CType(Activator.GetObject(GetType(SampleService), replicationServerUrl + replicatedServiceUri), SampleService)
         Dim returnMessage As IMethodReturnMessage = RemotingServices.ExecuteMessage(replicationService, requestMethodCallMessage)
         
         ' Prints the results of the method call stored in the IMethodReturnMessage.
         Console.WriteLine(ControlChars.Cr + "Message returned by ExecuteMessage.")
         Console.WriteLine(ControlChars.Tab + "Exception = {0}", returnMessage.Exception)
         Console.WriteLine(ControlChars.Tab + "ReturnValue = {0}", returnMessage.ReturnValue)
         Console.WriteLine(ControlChars.Tab + "OutArgCount = {0}", returnMessage.OutArgCount)
         Console.WriteLine("Return message OutArgs")
         For Each o In  requestMethodCallMessage.Args
            Console.WriteLine(ControlChars.Tab + "{0}", o)
         Next o
         
      End If
      
   Catch e As InvalidCastException
      Console.WriteLine("The requestMessage is not a MethodCall")
   End Try

End Sub

Kommentarer

Den aktuella metoden används i särskilda fall av servern för att vidarebefordra det angivna metodanropet till ett annat, eventuellt fjärranslutet, objekt. Den här metoden kan bara anropas när anroparen är i rätt kontext.

Gäller för

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