BeforeSendReply Method
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IDispatchMessageInspector.BeforeSendReply Method (Message, Object)


Called after the operation has returned but before the reply message is sent.

Namespace:   System.ServiceModel.Dispatcher
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

Sub BeforeSendReply (
	ByRef reply As Message,
	correlationState As Object


Type: System.ServiceModel.Channels.Message

The reply message. This value is null if the operation is one way.

Type: System.Object

The correlation object returned from the AfterReceiveRequest method.

Use the BeforeSendReply method to perform custom behavior prior to sending the return message. The correlationState is the object returned from the AfterReceiveRequest method that you can use to perform correlation between inbound and outbound calls to support your behavior.

The following code example shows a basic IDispatchMessageInspector that writes a string to the console when it is invoked.

#Region "IDispatchMessageInspector Members"
       Public Function AfterReceiveRequest(ByRef request As System.ServiceModel.Channels.Message, _
                          ByVal channel As IClientChannel, ByVal instanceContext As InstanceContext) _
                          As Object Implements IDispatchMessageInspector.AfterReceiveRequest
           Console.WriteLine("IDispatchMessageInspector.AfterReceiveRequest called.")
           Return Nothing
       End Function

       Public Sub BeforeSendReply(ByRef reply As System.ServiceModel.Channels.Message, ByVal correlationState As Object) _
       Implements IDispatchMessageInspector.BeforeSendReply
           Console.WriteLine("IDispatchMessageInspector.BeforeSendReply called.")
       End Sub
#End Region

The following code example shows the implementation of an IServiceBehavior that adds the InspectorIDispatchMessageInspector to the DispatchRuntime.MessageInspectors collection.

#Region "IServiceBehavior Members"
       Public Sub AddBindingParameters(ByVal serviceDescription As ServiceDescription, _
                      ByVal serviceHostBase As ServiceHostBase, ByVal endpoints As  _
                      System.Collections.ObjectModel.Collection(Of ServiceEndpoint), _
                      ByVal bindingParameters As BindingParameterCollection) Implements IServiceBehavior.AddBindingParameters
       End Sub

       Public Sub ApplyDispatchBehavior(ByVal serviceDescription As ServiceDescription, _
                                        ByVal serviceHostBase As ServiceHostBase) Implements _
           For Each chDisp As ChannelDispatcher In serviceHostBase.ChannelDispatchers
               For Each epDisp As EndpointDispatcher In chDisp.Endpoints
                   epDisp.DispatchRuntime.MessageInspectors.Add(New Inspector())
                   For Each op As DispatchOperation In epDisp.DispatchRuntime.Operations
                       op.ParameterInspectors.Add(New Inspector())
                   Next op
               Next epDisp
           Next chDisp
       End Sub

The following code example shows the use of an application configuration file to load the service behavior that inserts the InspectorIDispatchMessageInspector.

.NET Framework
Available since 3.0
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