IReceiveMessageCallback.OnReceiveMessage 方法

定义

命名空间:

System.ServiceModel.Activities

程序集:

System.ServiceModel.Activities.dll

收到服务消息时执行。

public:
 void OnReceiveMessage(System::ServiceModel::OperationContext ^ operationContext, System::Activities::ExecutionProperties ^ activityExecutionProperties);

public void OnReceiveMessage (System.ServiceModel.OperationContext operationContext, System.Activities.ExecutionProperties activityExecutionProperties);

abstract member OnReceiveMessage : System.ServiceModel.OperationContext * System.Activities.ExecutionProperties -> unit

Public Sub OnReceiveMessage (operationContext As OperationContext, activityExecutionProperties As ExecutionProperties)

参数

operationContext

OperationContext

接收消息时所在的操作上下文。

activityExecutionProperties

ExecutionProperties

工作流中可用的执行属性的集合。

示例

下面的示例演示如何实现用于在收到消息时访问消息标头的 IReceiveMessageCallback 接口。

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.");
        }
    }
}