IReceiveMessageCallback Interface

Definition

Namespace:

System.ServiceModel.Activities

Assembly:

System.ServiceModel.Activities.dll

Implements a callback to be executed when a service message is received by the Receive and ReceiveParametersContent activities.

C#

public interface IReceiveMessageCallback

Examples

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

C#

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)
    {
        try
        {
            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.");
        }
    }
}

Methods

OnReceiveMessage(OperationContext, ExecutionProperties)

Executed when a service message is received.

Applies to