Solved

How to kill a spawned process?

Posted on 2008-06-15
3
1,664 Views
Last Modified: 2010-04-21
Hi,

I'm running an external server using System.Diagnostics.Process, the problem
is that this server spawns another process.
So far I am only able to close/kill the first process but not the spawned one.
Is there some way to track all spawned processes and kill them on demand?

I can not kill it by name alone, since this is a common thread name, which could
mean that I kill some other apps process.

Thanks!
0
Comment
Question by:oxyoo
  • 2
3 Comments
 
LVL 10

Author Comment

by:oxyoo
ID: 21790774
I think I have what is needed now, after a lot of research. The code
is pretty ugly but so far does the job.

Can anyone find any flaws with it?

What the code does is that iterates through all the processes and
finds the parentId, then compares it with my runningServer process
to see if it is the parent. If yes, it kills it.

                int parentId = runningServer.Id;
 

                foreach (Process process in Process.GetProcesses()) {

                    PerformanceCounter myParentMultiProcID = new PerformanceCounter("Process", "ID Process",

                                                                                    process.ProcessName);
 

                    try {

                        float tmpParentPID = myParentMultiProcID.NextValue();
 

                        if (tmpParentPID == parentId) {

                            process.Kill();

                            process.Dispose();

                        }

                    }

                    catch (InvalidOperationException) {}

                }
 
 

                // NOT NEEDED?

                try {

                    runningServer.Kill();

                    runningServer.Dispose();

                    runningServer = null;

                }

                catch (InvalidOperationException) {}

Open in new window

0
 
LVL 1

Accepted Solution

by:
gregmulvihill earned 500 total points
ID: 21791840
I adapted a solution (http://blogs.msdn.com/bclteam/archive/2006/06/20/640259.aspx) presented by Robert Villahermosa to deal with multiple process instances of the same name.  Pass in the process ID of the server you started with System.Diagnostics.Process, and FindChildProcessIDs should return an array with all the spawned process IDs.  Then you can iterate through the list and kill the processes.

Example:

int[] oChildProcessIDs = FindChildProcessIDs(nServiceProcessID);

foreach (int nProcessID in oChildProcessIDs)
{
      Process oProcess = Process.GetProcessById(nProcessID);
      oProcess.Kill();
      oProcess.Dispose();
}




		public static int[] FindChildProcessIDs(int nParentProcessID)

		{

			List<int> oChildProcessIDs = new List<int>();
 

			foreach (Process oProcess in Process.GetProcesses())

			{

				Process oParentProcess = FindParentProcess(oProcess);
 

				if ((null != oParentProcess) && (nParentProcessID == oParentProcess.Id))

				{

					oChildProcessIDs.Add(oProcess.Id);

				}

			}
 

			return oChildProcessIDs.ToArray();

		}
 

		

		public static Process FindParentProcess(Process oTargetChildProcess)

		{

			Process oParentProcess = null;
 

			Process[] oChildProcessList = Process.GetProcessesByName(oTargetChildProcess.ProcessName);
 

			for (int nIndex = 0; nIndex < oChildProcessList.Length; nIndex++)

			{

				string sChildProcessName = oTargetChildProcess.ProcessName;
 

				if (nIndex != 0) sChildProcessName += "#" + nIndex;
 

				PerformanceCounter oChildProcessID = new PerformanceCounter("Process", "ID Process", sChildProcessName);

				PerformanceCounter oParentProcessID = new PerformanceCounter("Process", "Creating Process ID", sChildProcessName);
 

				int nChildProcessID = (int)oChildProcessID.NextValue();

				int nParentProcessID = (int)oParentProcessID.NextValue();
 

				oChildProcessID.Dispose();

				oParentProcessID.Dispose();
 

				if (oTargetChildProcess.Id == nChildProcessID)

				{

					try

					{

						oParentProcess = Process.GetProcessById(nParentProcessID);
 

						break;

					}

					catch { }

				}

			}
 

			return oParentProcess;

		}

Open in new window

0
 
LVL 10

Author Closing Comment

by:oxyoo
ID: 31467371
Thanks, an excellent solution!
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Extention Methods in C# 3.0 by Ivo Stoykov C# 3.0 offers extension methods. They allow extending existing classes without changing the class's source code or relying on inheritance. These are static methods invoked as instance method. This…
Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, just open a new email message. In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now