Debug.WriteLine 不工作 [英] Debug.WriteLine not working

问题描述

过去，也许是我现在使用的 2008 之前的 Visual Studio 版本，我会在我的 VB.NET 代码中执行以下操作:

In the past, perhaps versions of Visual Studio prior to the 2008 that I am using now, I would do something like this in my VB.NET code:

System.Diagnostics.Debug.WriteLine("Message")

..并且输出将进入输出窗口.

..and the output would go to the output window.

现在不行了.显然必须首先启用某些东西.

Now it doesn't. Something must first apparently be enabled.

如果这涉及附加调试器"，请说明如何操作.在我看来，它应该可以正常工作而不必大惊小怪.

If this involves "attaching a debugger", please explain how to do it. It seems to me that it should just work without too much of a fuss.

这是一个实时解释问题并向您展示我的所有设置的视频:

Here's a video explaining the issue in real time and showing you all my settings:

http://screencast.com/t/YQnPb0mJcs

我使用的是 Visual Studio 2008.

I'm using Visual Studio 2008.

推荐答案

所有好的建议.我注意到我没有看到提到这个提示，所以我会说:在你的 app.config 文件中，确保你没有 <clear/>元素在您的跟踪侦听器中.

All good suggestions. I noticed that I don't see this tip mentioned, so I'll say it: In your app.config file, make sure you don't have a <clear/> element in your trace listeners.

您将有效地清除跟踪侦听器列表，包括用于调试语句的默认跟踪侦听器.

You will effectively be clearing the list of trace listeners, including the default trace listener used for Debug statements.

以下是您的 app.config 文件中的内容:

Here's what this would look like in your app.config file:

<system.diagnostics>
    <trace>
      <listeners>
          <!-- This next line is the troublemaker.  It looks so innocent -->
          <clear/>
      </listeners>
    </trace>
  </system.diagnostics>

如果您想在 app.config 文件中为跟踪侦听器设置占位符，则应改为使用以下内容:

If you want to have a placeholder for trace listeners in your app.config file, you should instead use something like this:

<system.diagnostics>
    <trace>
      <listeners>
      </listeners>
    </trace>
  </system.diagnostics>

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