无法调试Windows服务

Question

I was looking into several posts in order to find how to debug a Windows Service. I've found that if I put the following code in my OnStart() function:

Debugger.Launch();

would do the trick, but after I start my windows service via the CMD (NET START), it just starts and runs properly but the debugger never launches, even though the VS is opened with the loaded windows service.

I feel like I'm missing something, what is it?

Answer 1

You may try to include this in the OnStart method:

while(!System.Diagnostics.Debugger.IsAttached)
{
    System.Threading.Thread.Sleep(100);
}

Then, manually attach to the process from the Visual Studio menu: Debug - > Attach to Process .

Also, please note that in the Remarks section of the Debugger.Launch Method topic is stated that:

If a debugger is already attached, nothing happens.

Answer 2

I am doing that by modifing service's Main method, it's in the Program.cs and by default it looks like this :

ServiceBase[] ServicesToRun;
ServicesToRun = new ServiceBase[] { new ServiceMain() };
ServiceBase.Run(ServicesToRun);

you can then use Environment.UserInteractive to find out is your service started like a service or trough debugger :

if (!Environment.UserInteractive)
{
  ServiceBase[] ServicesToRun;
  ServicesToRun = new ServiceBase[] { new ServiceMain() };
  ServiceBase.Run(ServicesToRun);
}
else
{
  ServiceMain sm = new ServiceMain();
  Console.Write("Service debug run");
  sm.StartForDebugging();
}

Of course you will have to add StartForDebugging method in your service and do practically the same like you do in OnStart method, or you could call OnStart method directly just make it public.