c# - MSMQ，消息被放入队列并消失但从未被服务契约(Contract)接收

Question

我有一个本地专用队列。我在 MVC 应用程序中也有一个 WCF 服务，它使用 msmqIntegrationBinding 监听队列。问题在于，当消息排队时永远不会调用服务契约，但消息会在那一刻消失。邮件不在病毒队列中。这是我声明绑定(bind)到队列的配置部分:

<services>
  <service name="SkruvInfo.Web.Service.QueueMessageReceiver">
    <endpoint address="msmq.formatname:DIRECT=OS:LEIA\private$\screwinfo_autotests_messagequeue"
                      binding="msmqIntegrationBinding"
                      bindingConfiguration="MsmqBinding"
                      contract="SkruvInfo.Web.Service.IQueueMessageReceiver" />
  </service>
</services>

这是契约(Contract):

[ServiceContract(Namespace = "http://localhost/SkruvWeb/Service")]
public interface IQueueMessageReceiver
{
    [OperationContract(IsOneWay = true, Action = "*")]
    void PutScrewInfoMessage(MsmqMessage<string> msg);
}

这是服务中的方法:

    [OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)]
    public void PutScrewInfoMessage(System.ServiceModel.MsmqIntegration.MsmqMessage<string> msg)
    {
        log4net.Config.XmlConfigurator.Configure();
        var log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        try
        {
            log.Debug("Message from queue: " + msg.Body.ToString(CultureInfo.InvariantCulture));
            var xDoc = new XmlDocument();
            xDoc.LoadXml(msg.Body);
            CacheScrewInfoModelFromScrewInfoXmlDoc(xDoc);
        }
        catch (Exception e)
        {
            log.Error("Error parsing message from queue",e);
            EventLog.WriteEntry("Application","Message error for screws");
        }
    }

对于为什么消息消失但不调用服务有什么建议吗？

Answer 1

尝试使用 ServiceKnownType 属性修改您的服务契约(Contract):

[ServiceContract(Namespace = "http://localhost/SkruvWeb/Service")]
[ServiceKnownType(typeof(String))]
public interface IQueueMessageReceiver
{
    [OperationContract(IsOneWay = true, Action = "*")]
    void PutScrewInfoMessage(MsmqMessage<string> msg);
}

更新

如果您使用的是 MsmqIntegrationBinding，我假设您的队列客户端是 VB6 客户端之类的遗留应用程序？如果是这样，您将需要在服务绑定(bind)配置中指定序列化格式。例如:

  <msmqIntegrationBinding>
    <binding name="MsmqBinding" serializationFormat="ActiveX">
      <security mode="None" />
    </binding>
  </msmqIntegrationBinding>

记录了允许值 here .