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IMethodCallMessage Interface

Defines the method call message interface.

Namespace:  System.Runtime.Remoting.Messaging
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
<ComVisibleAttribute(True)> _
Public Interface IMethodCallMessage _
	Inherits IMethodMessage, IMessage
'Usage
Dim instance As IMethodCallMessage

An IMethodCallMessage is generated as a result of a method called on a remote object, and is used to transport details about the remote method call to the server side.

Imports System
Imports System.Collections
Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Proxies
Imports System.Runtime.Remoting.Messaging
Imports System.Security.Permissions

Namespace IMethodCallMessageNS

   ' MyProxy extends the CLR Remoting RealProxy. 
   ' In the same class, in the Invoke method, we demonstrate the 
   ' methods and properties of the IMethodCallMessage.

   <PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
   Public Class MyProxy
      Inherits RealProxy

      Public Sub New(ByVal myType As Type)
         ' This constructor forwards the call to base RealProxy. 
         ' RealProxy uses the Type to generate a transparent proxy. 
         MyBase.New(myType)
      End Sub 'New 

      Public Overrides Function Invoke(ByVal myIMessage As IMessage) As IMessage
         Console.WriteLine("MyProxy.Invoke Start")
         Console.WriteLine("")

         If TypeOf myIMessage Is IMethodCallMessage Then
            Console.WriteLine("Message is of type 'IMethodCallMessage'.")
            Console.WriteLine("")

            Dim myIMethodCallMessage As IMethodCallMessage
            myIMethodCallMessage = CType(myIMessage, IMethodCallMessage)

            Console.WriteLine("InArgCount is : " + myIMethodCallMessage.InArgCount.ToString)
            Dim myObj As Object
            For Each myObj In myIMethodCallMessage.InArgs
               Console.WriteLine("InArgs is : " + myObj.ToString())
            Next 

            Dim i As Integer 
            For i = 0 To myIMethodCallMessage.InArgCount - 1
               Console.WriteLine("GetArgName(" + i.ToString() + ") is : " + myIMethodCallMessage.GetArgName(i))
               Console.WriteLine("GetInArg(" + i.ToString() + ") is : " + myIMethodCallMessage.GetInArg(i).ToString)
            Next i

            Console.WriteLine("")
         ElseIf TypeOf myIMessage Is IMethodReturnMessage Then
            Console.WriteLine("Message is of type 'IMethodReturnMessage'.")
         End If 

         ' Build Return Message 
         Dim myReturnMessage As New ReturnMessage(5, Nothing, 0, Nothing, _
                                    CType(myIMessage, IMethodCallMessage))

         Console.WriteLine("MyProxy.Invoke - Finish")
         Return myReturnMessage

      End Function 'Invoke



   End Class 'MyProxy

   ' The class used to obtain Metadata.
   <PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
   Public Class MyMarshalByRefClass
      Inherits MarshalByRefObject

      Public Function MyMethod(ByVal str As String, ByVal dbl As Double, ByVal i As Integer) As Integer
         Console.WriteLine("MyMarshalByRefClass.MyMethod {0} {1} {2}", str, dbl, i)
         Return 0
      End Function 'MyMethod
   End Class 'MyMarshalByRefClass

   ' Main class that drives the whole sample. 
   Public Class ProxySample

      <SecurityPermission(SecurityAction.LinkDemand)> _
      Shared Sub Main()
         Console.WriteLine("Generate a new MyProxy.")
         Dim myProxy As New MyProxy(GetType(MyMarshalByRefClass))

         Console.WriteLine("Obtain the transparent proxy from myProxy.")
         Dim myMarshalByRefClassObj As MyMarshalByRefClass = _
                        CType(myProxy.GetTransparentProxy(), MyMarshalByRefClass)

         Console.WriteLine("Calling the Proxy.")
         Dim myReturnValue As Object = myMarshalByRefClassObj.MyMethod("Microsoft", 1.2, 6)

         Console.WriteLine("Sample Done.")
      End Sub 'Main
   End Class 'ProxySample
End Namespace 'IMethodCallMessageNS
#using <mscorlib.dll>

using namespace System;
using namespace System::Collections;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Proxies;
using namespace System::Runtime::Remoting::Messaging;

	// MyProxy extends the CLR Remoting RealProxy.
	// In the same class, in the Invoke method, the methods and properties of the 
	// IMethodCallMessage are demonstrated.

public __gc class MyProxy : public RealProxy 
{
public:
	MyProxy(Type* myType) : RealProxy(myType) 
	{
		// This constructor forwards the call to base RealProxy.
		// RealProxy uses the Type to generate a transparent proxy.
	}


public:
	IMessage* Invoke(IMessage* myIMessage) 
	{
		Console::WriteLine(S"MyProxy::Invoke Start");
		Console::WriteLine(S"");
		ReturnMessage* myReturnMessage = 0;

		if (dynamic_cast<IMethodCallMessage*>(myIMessage)) 
		{
			Console::WriteLine(S"Message is of type 'IMethodCallMessage*'.");
			Console::WriteLine(S"");

			IMethodCallMessage* myIMethodCallMessage;
			myIMethodCallMessage = dynamic_cast<IMethodCallMessage*>(myIMessage);
			Console::WriteLine(S"InArgCount is  : {0}", __box(myIMethodCallMessage->InArgCount));

			IEnumerator* myEnum = myIMethodCallMessage->InArgs->GetEnumerator();
			while (myEnum->MoveNext()) 
			{
				Object* myObj = __try_cast<Object*>(myEnum->Current);

				Console::WriteLine(S"InArgs is : {0}", myObj);
			}

			for (int i=0; i<myIMethodCallMessage->InArgCount; i++) 
			{
				Console::WriteLine(S"GetArgName({0}) is : {1}", __box(i), myIMethodCallMessage->GetArgName(i));
				Console::WriteLine(S"GetInArg({0}) is : {0}", __box(i), myIMethodCallMessage->GetInArg(i));
			}
			Console::WriteLine(S"");
		}
		else if (dynamic_cast<IMethodReturnMessage*>(myIMessage))
			Console::WriteLine(S"Message is of type 'IMethodReturnMessage*'.");

		// Build Return Message 
		myReturnMessage = new ReturnMessage( __box(5), 0, 0, 0, dynamic_cast<IMethodCallMessage*>(myIMessage));

		Console::WriteLine(S"MyProxy::Invoke - Finish");
		return myReturnMessage;
	}
};


// The class used to obtain Metadata.
public __gc class MyMarshalByRefClass : public MarshalByRefObject 
{
public:
	int MyMethod(String* str, double dbl, int i) 
	{
		Console::WriteLine(S"MyMarshalByRefClass::MyMethod {0} {1} {2}", str, __box(dbl), __box(i));
		return 0;
	}
};

// Main routine that drives the whole sample.
int main() 
{
	Console::WriteLine(S"Generate a new MyProxy.");
	MyProxy* myProxy = new MyProxy(__typeof(MyMarshalByRefClass));

	Console::WriteLine(S"Obtain the transparent proxy from myProxy.");
	MyMarshalByRefClass* myMarshalByRefClassObj = 
		dynamic_cast<MyMarshalByRefClass*>(myProxy->GetTransparentProxy());

	Console::WriteLine(S"Calling the Proxy.");
	Object* myReturnValue = __box(myMarshalByRefClassObj->MyMethod(S"Microsoft", 1.2, 6));

	Console::WriteLine(S"Sample Done.");
	return 0;
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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