IReceiveMessageCallback.OnReceiveMessage 方法

定義

命名空間:

System.ServiceModel.Activities

組件:

System.ServiceModel.Activities.dll

在接收到服務訊息時執行。

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)

參數

operationContext

OperationContext

作業內容，訊息會在這個內容中接收。

activityExecutionProperties

ExecutionProperties

工作流程內可用的執行屬性集。

範例

下列範例將示範如何實作 IReceiveMessageCallback 介面，以便在接收到訊息時存取訊息標頭。

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.");
        }
    }
}