Kill all running cmd processes

Question

My program runs 10 cmd processes, and i want to add a stop button, so when you press it, it kills all 10 cmd processes. I found some tutorials online, but nothing seems to work! 

also, is it possible to make it so when you close the window, it kills the the cmd processes as well?

Thanks a lot :)

Answer 1

It really depends on how you're starting your processes. Why haven't you posted your failing code, so that we don't have to guess? Posting concise and complete examples is in almost any case a good idea.

A look in my Crystal Ball (TM): Thou shall kill it. Use Process.Kill.

Answer 2

> My program runs 10 cmd processes, and i want to add a stop button, so when you press it, it kills all 10 cmd processes.
 
 
this is possible with WMI. try using the following code:
 

using System.Diagnostics;
using System.Management;   // System.Management.dll
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        void Button_Click(object sender, System.EventArgs e)
        {
            TerminateChildProcess(Process.GetCurrentProcess().Id);
        }

        static void TerminateChildProcess(int parentId)
        {
            var mos = new ManagementObjectSearcher(
                string.Format("SELECT * FROM Win32_Process WHERE ParentProcessId = {0}", parentId));
            foreach (ManagementBaseObject mbo in mos.Get())
            {
                var p = mbo as ManagementObject;
                if (p == null) continue;
                uint res = (uint)p.InvokeMethod("Terminate", new object[0]);
                if (res != 0)
                {
                    // handle error
                }
            }
        }
    }
}

    
you can find  the other filter criteria in the Win32_Process
 
 

Answer 3

Here is the start button,

        private void button1_Click(object sender, EventArgs e)
        {
            for (int num = 0; num < 10; num++)
            {
                Process.Start("buddy.bat");
            }           
        }

and here is the stop button that wont work,

        private void button1_Click_1(object sender, EventArgs e)
        {
            Process[] processes = Process.GetProcessesByName("Windows Command Prompt");

            foreach (Process process in processes)
            {
                process.Kill();
            }
        }

Answer 4

Windows Command Prompt should be "cmd". This should work:

Array.ForEach(Process.GetProcessesByName("cmd"), x => x.Kill());

Cheers :)

---

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Answer 5

Okay, when no one's asking: I translate that his program starts the processes, thus when using the Process class the code should simply look like that:

        private List<Process> processes = new List<Process>();

        private void btnStart_Click(object sender, EventArgs e)
        {
            Process process = new Process();
            // Setup process.
            process.Start();
            processes.Add(process);

            // Repeat as neeeded:
            process = new Process();
            // Setup process.
            process.Start();
            processes.Add(process);
        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            foreach (Process process in this.processes)
                process.Kill();
        }

Answer 6

Hi Monster,

I am writing to check the status of the issue on your side. Would you mind letting us know the result of the suggestions?

Have a nice day.

---

Alan Chen[MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 7

Windows Command Prompt should be "cmd". This should work:

Array.ForEach(Process.GetProcessesByName("cmd"), x => x.Kill());

Cheers :)

---

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I have tried this method, but when i press the button, nothing happens?

Answer 8

Hi Monster,

Thanks for your feedback.

I think you should debug your code to see what happened.

    private void button1_Click_1(object sender, EventArgs e)
         {
             Process[] processes = Process.GetProcessesByName("cmd");
 // set break point here
            foreach (Process process in processes)
             {
                 process.Kill();
             }
         }

1.Set break point before foreach line; 2. press F5 to begin debug; 3. open watch window from Debug-Windows-Watch; 4. Input "processes" to watch is there any processes in the value.

Have a nice day. 

---

Alan Chen[MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 9

You should really tell us (show us your code), how you start your processes ("My program runs 10 cmd processes"). You should already have the necessary information at hand when starting your processes. Just use it. Take a look at my code example.

Answer 10

By "cmd processes" I assumed he meant cmd.exe. My method works, as i've tested it, so there has to be something that we're not understanding here. My method essentially works the same way Alan_chen had posted, only in a more compact way. I would be curious to see what process he's actually trying to kill here, as the only thing that would need changing in the code I gave him (or most others here) would be the string argument input for the GetProcessesByName function.

I would run this:

Process.GetProcessesByName("cmd").Count();

And see if that returns a value greater than 0.

---

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