MSMQ:How通过确认消息找出原始消息？

Question

我正在通过指定的确认队列发送消息，这样我就可以确定消息是否已到达目标队列。代码如下：

 string queuePath = @"FormatName:DIRECT=TCP:127.0.0.1\PRIVATE$\testqueue";
                    string ackPath = @".\private$\ack";
                    MessageQueue msmq = new MessageQueue(queuePath,QueueAccessMode.SendAndReceive);
                    tran.Begin();
                    Message msg = new Message();
                    msg.UseAuthentication = false;
                    msg.Recoverable = true;
                    msg.Body = "HelloWorld";
                    msg.AcknowledgeType = AcknowledgeTypes.FullReachQueue;
                    msg.AdministrationQueue = new MessageQueue(ackPath, QueueAccessMode.ReceiveAndAdmin);
                    msmq.Send(msg, tran);
                    tran.Commit();

一切顺利，发送消息后，我可以在队列"ack"中找到确认消息。但是我无法弄清楚确认消息和原始消息之间的关系。

所以我的问题是：如何将确认消息映射到原始消息？

Answer 1

您需要使用 System.Messaging.Message.CorrelationId 属性.

Gets or sets the message identifier used by acknowledgment, report, and response messages to reference the original message.

来源：https://msdn.microsoft.com/en-us/library/system.messaging.message.correlationid(v=vs.110).aspx

var msgToSend = new Message();
// ... set message props including admin queue
var targetQueue = new MessageQueue(...);
targetQueue.Send(msgToSend);

// Read acknowledgment
var adminQueue = new MessageQueue(ackPath);
var msgAck = adminQueue.ReceiveByCorrelationId(msgToSend.Id, new TimeSpan(0, 0, 2));
if (msgAck)
{
    return msgAck.Acknowledgment;
}

也有 PeekByCorrelationId 方法，或者 ReceiveByCorrelationId 的重载形式，您应该查看更多信息。

MSMQ:How通过确认消息找出原始消息？

MSMQ:How to find out the original message by the acknowledgment message?

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