Solved

How to kill a spawned process?

Posted on 2008-06-15
3
1,669 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

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

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

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…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

786 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