IReceiveMessageCallback Interface

.NET Framework (current version)

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Implements a callback to be executed when a service message is received by the Receive and T:System.ServiceModel.Activities.ReceiveParameters activities.

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

public interface IReceiveMessageCallback

System_CAPS_pubmethodOnReceiveMessage(OperationContext, ExecutionProperties)

Executed when a service message is received.

The following example shows how to implement the IReceiveMessageCallback interface to access a message header when a message is received.

class ReceiveInstanceIdCallback : IReceiveMessageCallback
    public const string HeaderName = "InstanceIdHeader";
    public const string HeaderNS = "http://Microsoft.Samples.AccessingOperationContext";

    public void OnReceiveMessage(System.ServiceModel.OperationContext operationContext, System.Activities.ExecutionProperties activityExecutionProperties)
            Guid instanceId = operationContext.IncomingMessageHeaders.GetHeader<Guid>(HeaderName, HeaderNS);
            Console.WriteLine("Received a message from a workflow with instanceId = {0}", instanceId);
        catch (MessageHeaderException)
            Console.WriteLine("This message must not be from a workflow.");

.NET Framework
Available since 4.0
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