IClientChannelSink Interface


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Provides required functions and properties for client channel sinks.

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

public interface IClientChannelSink : IChannelSinkBase


Gets the next client channel sink in the client sink chain.


Gets a dictionary through which properties on the sink can be accessed.(Inherited from IChannelSinkBase.)

System_CAPS_pubmethodAsyncProcessRequest(IClientChannelSinkStack, IMessage, ITransportHeaders, Stream)

Requests asynchronous processing of a method call on the current sink.

System_CAPS_pubmethodAsyncProcessResponse(IClientResponseChannelSinkStack, Object, ITransportHeaders, Stream)

Requests asynchronous processing of a response to a method call on the current sink.

System_CAPS_pubmethodGetRequestStream(IMessage, ITransportHeaders)

Returns the Stream onto which the provided message is to be serialized.

System_CAPS_pubmethodProcessMessage(IMessage, ITransportHeaders, Stream, ITransportHeaders, Stream)

Requests message processing from the current sink.

Channel sinks provide a plug-in point that allows access to the underlying messages flowing through the channel as well as the stream used by the transport mechanism to send messages to a remote object. Channel sinks are linked together in a chain of channel sink providers and all channel messages flow through this chain of sinks before they are serialized and transported.

The following code example illustrates an implementation of the IClientChannelSink interface.

using System;
using System.Collections;
using System.IO;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Messaging;
using System.Security.Permissions;

public class ClientSink : BaseChannelSinkWithProperties, IClientChannelSink

    // This class inherits from BaseChannelSinkWithPropertes
    // to get an implementation of IChannelSinkBase.

    // The next sink in the chain.
    private IClientChannelSink nextSink;

    public IClientChannelSink NextChannelSink
        [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public Stream GetRequestStream (IMessage message, ITransportHeaders requestHeaders)
        // Get the request stream from the next sink in the chain.
        return( nextSink.GetRequestStream(message, requestHeaders) );

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public void ProcessMessage (IMessage message,
                                ITransportHeaders requestHeaders,
                                Stream requestStream,
                                out ITransportHeaders responseHeaders,
                                out Stream responseStream)
        // Print the request message properties.
        Console.WriteLine("---- Message from the client ----");
        IDictionary dictionary = message.Properties;
        foreach (Object key in dictionary.Keys)
            Console.WriteLine("{0} = {1}", key, dictionary[key]);

        // Hand off to the next sink in the chain.
        nextSink.ProcessMessage(message, requestHeaders, requestStream, out responseHeaders, out responseStream);

    // For synchronous remoting, it is not necessary to implement this method.
    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public void AsyncProcessRequest (IClientChannelSinkStack sinkStack,
                                     IMessage message,
                                     ITransportHeaders requestHeaders,
                                     Stream requestStream)
        throw new NotImplementedException();

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public void AsyncProcessResponse (IClientResponseChannelSinkStack sinkStack,
                                      Object state,
                                      ITransportHeaders responseHeaders,
                                      Stream responseStream)
        throw new NotImplementedException();

    // Constructor
    public ClientSink (IClientChannelSink sink) {
      if (sink == null) throw new ArgumentNullException("sink");
      nextSink = sink;


See the IClientChannelSinkProvider interface documentation for an example of the corresponding client sink provider implementation.

.NET Framework
Available since 1.1
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