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我有这个代码，它是我的BackgroundWorkerXMLPutMessages_DoWorkSub 的一部分。

Try
            PublicMQVariable.MQMessage_Reply = New MQMessage
            PublicMQVariable.MQMessage_Reply.CorrelationId = PublicMQVariable.MQMessage_Request.MessageId
            PublicMQVariable.MQMessage_Reply.MessageType = MQC.MQMT_REPLY
            PublicMQVariable.MQGetMessageOptions_Reply = New MQGetMessageOptions
            PublicMQVariable.MQGetMessageOptions_Reply.Options = MQC.MQGMO_WAIT + MQC.MQGMO_FAIL_IF_QUIESCING
            PublicMQVariable.MQGetMessageOptions_Reply.MatchOptions = MQC.MQMO_MATCH_CORREL_ID
            PublicMQVariable.MQGetMessageOptions_Reply.WaitInterval = My.Settings.MQ_ReplyTimeOut
            PublicMQVariable.MyStopwatch = New Stopwatch
            PublicMQVariable.MyStopwatch.Start()
            PublicMQVariable.MQQueue_Response.Get(PublicMQVariable.MQMessage_Reply, PublicMQVariable.MQGetMessageOptions_Reply)
            PublicMQVariable.MyStopwatch.Stop()
            PublicMQVariable.MyReplyMessage = PublicMQVariable.MQMessage_Reply.ReadString(PublicMQVariable.MQMessage_Reply.MessageLength)
        Catch ex As MQException
            MsgBox("MQException: compCode: " & ex.CompCode.ToString() & " Reason: " + ex.Reason.ToString() & " - " & ex.Message)
            MQDisconnectAndClose()
            Return
        End Try

执行此代码 ( ) 的那一刻PublicMQVariable.MQQueue_Response.Get(PublicMQVariable.MQMessage_Reply, PublicMQVariable.MQGetMessageOptions_Reply)，它会返回到BackgroundWorkerXMLPutMessages_RunWorkerCompleted没有完成上面的其余代码。

为什么会发生这种情况，我能做些什么来防止这种“过早完成”？

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1 回答 1

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它因异常而失败。忘记在 RunWorkerCompleted 事件处理程序中检查 e.Error 是一个非常常见的错误。如果使用 Debug + Exceptions 更易于调试，请勾选 CLR 异常的 Throw 复选框。

于 2013-11-13T13:37:34.783 回答