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BaseChannelSinkWithProperties Class

Provides a base implementation for channel sinks that want to expose a dictionary interface to their properties.

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

<ComVisibleAttribute(True)> _
Public MustInherit Class BaseChannelSinkWithProperties
	Inherits BaseChannelObjectWithProperties
Dim instance As BaseChannelSinkWithProperties

/** @attribute ComVisibleAttribute(true) */ 
public abstract class BaseChannelSinkWithProperties extends BaseChannelObjectWithProperties
public abstract class BaseChannelSinkWithProperties extends BaseChannelObjectWithProperties

Channel sinks provide a plug-in point that allows access to the underlying messages that are flowing through the channel as well as the stream that is 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 the message is serialized and transported.

This class makes a link demand and an inheritance demand at the class level. A SecurityException is thrown when either the immediate caller or the derived class does not have infrastructure permission. For details about security demands, see Link Demands and Inheritance Demands.

Notes to Inheritors When you inherit from BaseChannelSinkWithProperties, you must implement the Keys property and the Item property.

<PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _
Friend Class MyClientFormatterChannelSink
   Inherits BaseChannelSinkWithProperties
   Implements IClientChannelSink, IMessageSink
   Private nextClientSink As IClientChannelSink = Nothing
   Private nextMessageSink As IMessageSink = Nothing

   Public Sub New(nextSink As IClientChannelSink, nextMsgSink As IMessageSink)
      nextClientSink = nextSink
      nextMessageSink = nextMsgSink
   End Sub 'New

   Public Sub ProcessMessage(msg As IMessage, requestHeaders As ITransportHeaders, _
               requestStream As Stream, ByRef responseHeaders As ITransportHeaders, _
               ByRef responseStream As Stream) _
               Implements IClientChannelSink.ProcessMessage
      nextClientSink.ProcessMessage(msg, requestHeaders, requestStream, _
                                    responseHeaders, responseStream)
   End Sub 'ProcessMessage

   Public Sub AsyncProcessRequest(sinkStack As IClientChannelSinkStack, _
            msg As IMessage, headers As ITransportHeaders, myStream As Stream) _
            Implements IClientChannelSink.AsyncProcessRequest
      sinkStack.Push(Me, Nothing)
      nextClientSink.AsyncProcessRequest(sinkStack, msg, headers, myStream)
   End Sub 'AsyncProcessRequest

   Public Sub AsyncProcessResponse(sinkStack As IClientResponseChannelSinkStack, _
            state As Object, headers As ITransportHeaders, myStream As Stream) _
            Implements IClientChannelSink.AsyncProcessResponse
      sinkStack.AsyncProcessResponse(headers, myStream)
   End Sub 'AsyncProcessResponse

   Public Function GetRequestStream(msg As IMessage, headers As ITransportHeaders) As Stream _
         Implements IClientChannelSink.GetRequestStream
      Return Nothing
   End Function 'GetRequestStream

   Public ReadOnly Property NextChannelSink() As IClientChannelSink _
         Implements IClientChannelSink.NextChannelSink
         Return nextClientSink
      End Get
   End Property

   Public ReadOnly Property NextSink() As IMessageSink _
         Implements IMessageSink.NextSink
         Return nextMessageSink
      End Get
   End Property

   Public Overrides ReadOnly Property Properties() As Collections.IDictionary _
            Implements IClientChannelSink.Properties
      End Get
   End Property

   Public Function AsyncProcessMessage(msg As IMessage, replySink As IMessageSink) As IMessageCtrl _
            Implements IMessageSink.AsyncProcessMessage
      Return Nothing
   End Function 'AsyncProcessMessage

   Public Function SyncProcessMessage(msg As IMessage) As IMessage _
            Implements IMessageSink.SyncProcessMessage
      Return nextMessageSink.SyncProcessMessage(msg)
   End Function 'SyncProcessMessage

   Default Public Overrides Property Item(key As Object) As Object
         If key Is GetType(MyKey) Then
            Return Me
         End If
         Return Nothing
      End Get
         Throw New NotSupportedException()
      End Set
   End Property

   Public Overrides ReadOnly Property Keys() As ICollection
         Dim myKeys As New ArrayList(0)
         Return myKeys
      End Get
   End Property
End Class 'MyClientFormatterChannelSink

Public Class MyKey
End Class 'MyKey


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

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

.NET Framework

Supported in: 2.0, 1.1, 1.0