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通过上述代码可以看出,其实实现自定义的TraceLister是非常方便的,我们可以方便的根据自己的需要将日志信息输出到不同的目标位置。
测试程序如下:
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目前从其它线程单独调用Debug.WriteLine是没有问题的,可以正确的将信息写入界面线程的控件中,但是当多个线程同时调用Debug.WriteLine的时候,会出现死锁现象,关于TraceListener的线程安全如何处理目前还不是很清楚,需要进一步完善。
这篇文章的产生基于这样的原因:一个程序因为过于庞大复杂,需要详细记录日志以便于操作,开始的时候采用了EnterpriseLibrary,效果确实好,非常方便,但后来提出程序可能要向PDA平台迁移,因此果断舍弃EnterpriseLibrary,决定采用其他方法,经过一番考察后决定采用系统自带的Debug类和Trace类,遗憾的是Trace类只提供了Assert方法,就是说在Release版本中是无法记录调试信息的,只有在DEBUG模式下面上述代码才能生效,但作为一个折中,基本上是满足项目要求了。