事件日志写入错误

Question

很简单，我想在事件日志中写点东西。

protected override void OnStop()
    {
        // TODO: Add code here to perform any tear-down necessary to stop your service.
        if (!System.Diagnostics.EventLog.SourceExists("IvrService"))
        {
            System.Diagnostics.EventLog.CreateEventSource(
                "IvrService", "IvrServiceLog");
        }
        EventLog eventLog1 = new System.Diagnostics.EventLog();
        eventLog1.Source = "IvrService";
        eventLog1.Log = "IvrServiceLog";
        try
        {
            eventLog1.WriteEntry("Successfully "+State.Stopped.ToString());
            IvrApplication.StopImmediate();
        }
        catch (Exception ex)
        {
           // eventLog1.WriteEntry(ex.Message);
        }
    }

例外是：

   Failed to stop service. System.ArgumentException: The source 'IvrService' is not   registered in log 'IvrServiceLog'. (It is registered in log 'Application'.) " The Source   and Log properties must be matched, or you may set Log to the empty string, and it will automatically be matched to the Source property.
   at System.Diagnostics.EventLogInternal.VerifyAndCreateSource(String sourceName, String currentMachineName)
   at System.Diagnostics.EventLogInternal.WriteEntry(String message, EventLogEntryType type, Int32 eventID, Int16 category, Byte[] rawData)
   at System.Diagnostics.EventLog.WriteEntry(String message)

Answer 1

错误消息准确地告诉您出了什么问题。您将事件源IvrService 注册到应用程序日志，而不是 IvrServiceLog。 System.Diagnostics.EventLog.SourceExists 验证源是否存在，但不是针对特定日志。

我的猜测是您最初在应用程序日志中注册了它，然后将其更改为写入IvrServiceLog。

要清理您的开发机器，您可以简单地运行以下命令，然后您的代码应该可以继续工作。

System.Diagnostics.EventLog.DeleteEventSource("IvrService");