无法获取正在运行/当前进程的列表？

Question

I'm trying to get the list of running processes / sessions on my computer with Win7 using the following code, which is found in internet. However it doesn't work? I have not got any compile errors.

namespace CurrentProcessesLister
{
   class Program
   {
      static void Main(string[] args)
      {
          Process[] runningProcesses = Process.GetProcesses();
          var currentSessionID = Process.GetCurrentProcess().SessionId; 
          Process[] sameAsthisSession = (from c in runningProcesses where c.SessionId ==    currentSessionID select c).ToArray(); 

          foreach (var p in sameAsthisSession) 
          { 
              Trace.WriteLine(p.ProcessName); 
          }
      }
  }
}

Answer 1

" there is no output in the console "

Then replace

Trace.WriteLine(p.ProcessName); 

with

Console.WriteLine(p.ProcessName); 

But if you then still don't see anything, it's time to start using the debugger.

Answer 2

The problem is you are using Trace.WriteLine to output the text. This is used for program tracing and won't show up by default in the console. Use Console.WriteLine instead.

  foreach (var p in sameAsthisSession) 
  { 
      Console.WriteLine(p.ProcessName); 
  }

Answer 3

Here is a Quick and Dirty way...

  Process[] proc = Process.GetProcesses();
  foreach(Process theprocess in proc)
  {
    Console.WriteLine("Process: {0} ID: {1}", theprocess.ProcessName, theprocess.Id);
  }

Answer 4

To further expand on what the previous posts have mentioned, the trace output does indeed show up but you need to look in the debugger output window in Visual Studio. The code you originally posted does indeed list the processes under the Debug section in the output window.

'ConsoleApplication1.Program..' 'ConsoleApplication1.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\\windows\\Microsoft.Net\\assembly\\GAC_MSIL\\System.Configuration\\v4.0_4.0.0.0__b03f5f7f11d50a3a\\System.Configuration.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
devenv
winlogon etc...