Terminate the proses.Start

Question

I have test a small program.I have 3 executable Training_, Training_1 and Training_2.
Training_ is a code to put Training_1 at startUp windows and Training_1 have a Proses.Start to start Training_2 automatically.
I don't how to stop or close Training_2 using Proses.kill() in Training_1.

Thank.

form code;

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;

namespace Training_1
{

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string myFavoritesPath = Environment.GetFolderPath(Environment.SpecialFolder.Favorites);
            Start_1.OpenApplication(myFavoritesPath);


        }

        private void button1_Click(object sender, EventArgs e)
        {
            string myFavoritesPath_ = Environment.GetFolderPath(Environment.SpecialFolder.Favorites);
            Start_1.StopApplication(myFavoritesPath_);

        }
    }

}

Class code

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;


namespace Training_1
{

    class Start_1
    {
        public static void OpenApplication(string myFavoritesPath)
        {
            try
            {
                using (Process myProcess = new Process())
                {
                    myProcess.StartInfo.UseShellExecute = false;
                    myProcess.StartInfo.FileName = "C:\\Users\\family\\Desktop\\Training_2.exe";
                    myProcess.StartInfo.CreateNoWindow = true;
                    myProcess.Start();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        public static void StopApplication(string myFavoritesPath_)
        {
            try
            {
                using (Process myProcess = Process.Start("C:\\Users\\family\\Desktop\\Training_2.exe"))
                {
                    myProcess.Kill();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }


    }
}

Answer 1

Please note that you opened two instances of Training_2.exe in the original code. They have their own PIDs. When you use myProcess.Kill();, it will only close the one opened in the StopApplication method.

Try this:

        class Start_1  
        {  
            private static Process myProcess;  
            public static void OpenApplication(string myFavoritesPath)  
            {  
                try  
                {  
                    myProcess = new Process()  
                    ...  
                }  
                catch (Exception e)  
                {  
                    Console.WriteLine(e.Message);  
                }  
            }  
  
            public static void StopApplication(string myFavoritesPath_)  
            {  
                try  
                {  
                    myProcess?.Kill();  
                    myProcess = null;  
                }  
                catch (Exception e)  
                {  
                    Console.WriteLine(e.Message);  
                }  
            }  

This is just how the idea of Viorel-1 is used in your code.

I wanted to post it as a comment, but the characters exceeded the comment limit, so I had to post it as an answer.

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Answer 2

Try something like this:

Process p = null;

private void Form1_Load(object sender, EventArgs e)
{
   string myFavoritesPath = Environment.GetFolderPath(Environment.SpecialFolder.Favorites);
   p = Start_1.OpenApplication(myFavoritesPath);
}

private void button1_Click(object sender, EventArgs e)
{
   p?.Kill();
   p = null;
}

. . .

public static Process OpenApplication(string myFavoritesPath)
{
   . . .
   return myProcess;
}

Answer 3

Hi TimonYang, thank for your feedback.
I follow your code in Class then in Form code at click button1 we put this code but nothing happen.
I don't where is wrong .

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace  Training_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string myFavoritesPath = Environment.GetFolderPath(Environment.SpecialFolder.Favorites);
            Begin_.OpenApplication(myFavoritesPath);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string myFavoritesPath_ = Environment.GetFolderPath(Environment.SpecialFolder.Favorites);
            Begin_.StopApplication(myFavoritesPath_);
        }


    }
}