如何调试.NET Windows Service OnStart方法？ [英] How to debug the .NET Windows Service OnStart method?

问题描述

我有一个.NET编写的代码，只能在安装为Windows服务时失败。故障不允许服务甚至启动。我不知道如何进入OnStart方法。

如何：调试Windows服务应用程序 给出了一个诱人的线索：

附加到服务的进程允许您调试大部分但不是全部的服务代码;例如，由于服务已经启动，您无法以这种方式调试服务的OnStart方法中的代码，或者用于加载服务的Main方法中的代码。解决此问题的一种方法是在服务应用程序中创建一个临时的第二个服务，该服务仅用于帮助调试。您可以安装这两个服务，然后启动此虚拟服务来加载服务进程。一旦临时服务启动该过程，您可以使用Visual Studio中的调试菜单附加到服务进程。

但是，我不清楚你应该如何创建虚拟服务来加载服务进程。 / p>

解决方案

作为一个临时解决方法，您可以做的一件事是启动调试器作为OnStart中的第一行代码

  System.Diagnostics.Debugger.Launch（）
  

这将提示您输入要使用的调试器。只需在Visual Studio中打开该解决方案，然后从列表中选择该实例。

I have code written in .NET that only fails when installed as a Windows service. The failure doesn't allow the service to even start. I can't figure out how I can step into the OnStart method.

How to: Debug Windows Service Applications gives a tantalizing clue:

Attaching to the service's process allows you to debug most but not all of the service's code; for example, because the service has already been started, you cannot debug the code in the service's OnStart method this way, or the code in the Main method that is used to load the service. One way to work around this is to create a temporary second service in your service application that exists only to aid in debugging. You can install both services, and then start this "dummy" service to load the service process. Once the temporary service has started the process, you can then use the Debug menu in Visual Studio to attach to the service process.

However, I'm not clear how it is exactly that you are supposed to create the dummy service to load the service process.

解决方案

One thing you could do as a temporary workaround is to launch the debugger as the first line of code in the OnStart

System.Diagnostics.Debugger.Launch()

This will prompt you for the debugger you'd like to use. Simply have the solution already open in Visual Studio and choose that instance from the list.

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