Article
11/18/2011

IRequestChannel.Request Method (Message)

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Sends a message-based request and returns the correlated message-based response.

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

Syntax

'Declaration
Function Request ( _
    message As Message _
) As Message

Message Request(
    Message message
)

Parameters

message
Type: System.ServiceModel.Channels.Message
The request Message to be transmitted.

Return Value

Type: System.ServiceModel.Channels.Message
The Message received in response to the request.

Remarks

Implementations of IRequestChannel ensure that the response message is correlated with the request message.

Generally, if an implementation of IRequestChannel receives a message that is not correlated to an outstanding request, it is dropped.

The Request method can be called concurrently across multiple threads.

Passing the message into the request channel causes the message to be consumed. After you call Request, you can no longer inspect the message or call Close on the message.

If the request message is larger that the maximum message size allowed by the binding being used, a QuotaExceededException is thrown. The maximum message size is set by the MaxReceivedMessageSize property. The default value is 65536 bytes.

Examples

The following code illustrates how to implement this method:

            ' Initialize request channel factory with a binding and a remote endpoint address.
            Dim binding As New BasicHttpBinding()
            Dim address As New EndpointAddress("https://localhost:8000/ChannelApp")
            Dim factory As New ChannelFactory(Of IRequestChannel)(binding, address)

            ' Create an IRequestChannel object and open it.
            Dim channel As IRequestChannel = factory.CreateChannel()
            channel.Open()

            ' Get the endpoint address for the channel.
            Dim epa As EndpointAddress = channel.RemoteAddress

            ' Get the transport address for the channel.
            Dim via As Uri = channel.Via

            ' Send a request message on  the channel.
            Dim request As Message = Message.CreateMessage(MessageVersion.Soap11, "hello")

            ' Request  sent and correlated with a reply message.
            Dim reply As Message = channel.Request(request)

            reply.Close()
            channel.Close()
            factory.Close()

// Initialize request channel factory with a binding and a remote endpoint address.
BasicHttpBinding binding = new BasicHttpBinding();
EndpointAddress address = new EndpointAddress("https://localhost:8000/ChannelApp");
ChannelFactory<IRequestChannel> factory =
    new ChannelFactory<IRequestChannel>(binding, address);

// Create an IRequestChannel object and open it.
IRequestChannel channel = factory.CreateChannel();
channel.Open();

// Get the endpoint address for the channel.
EndpointAddress epa = channel.RemoteAddress;

// Get the transport address for the channel.
Uri via = channel.Via;

// Send a request message on  the channel.
Message request = Message.CreateMessage(MessageVersion.Soap11, "hello");

// Request  sent and correlated with a reply message.
Message reply = channel.Request(request);

reply.Close();
channel.Close();
factory.Close();

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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