Getting notified about program termination

Question

Please find below my piece of code. I crawled through Stack Overflow on how to get notified if a process is terminated and used the suggestions in my code as below(last 3 lines).

    private void button1_Click(object sender, EventArgs e)
    {
        folderBrowserDialog1.ShowDialog();
        System.Diagnostics.Process process = new System.Diagnostics.Process();
        System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();            
        //startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
        startInfo.FileName = "cmd.exe";
        startInfo.Arguments = "/C rep_cmd "+textBox2.Text+" -text "+folderBrowserDialog1.SelectedPath+"\\";
        process.StartInfo = startInfo;
        System.Diagnostics.Process.Start(startInfo);
        if (process.HasExited == true)
           MessageBox.Show("Process done successfully!");            
    }

But, when I run the program, I get a runtime exception saying "No process is associated with this object". Clueless of how to rectify this.

Kindly help.

Your code doesn't indicate you called process.Start() to actually get the process going. — prprcupofcoffee, Apr 01 '13 at 17:41
You are attempting to start a process, but you haven't started. please share the link to the SO question that you used — Dhawalk, Apr 01 '13 at 17:44
Hi David and Dhawalk... Sorry for the chaos! Please find the piece of code which I just edited. — Navaneeth Krish, Apr 01 '13 at 17:46
I may be wrong, but shouldn't the code to start the process be: `process.Start();`? — NotMe, Apr 01 '13 at 17:55
Hi @ChrisLively! Made my program start statement as comment and tried process.Start(); But still, I could run the process but the message box is not displayed at the end. Any guess about the problem? — Navaneeth Krish, Apr 01 '13 at 17:57
[Start.Process()](http://msdn.microsoft.com/en-us/library/92699yzt%28v=vs.71%29.aspx) has 3 overloaded constructors. — Alina B., Apr 01 '13 at 17:58
you should not assign process.StartInfo directly, better is using the return value of Process.Start — user287107, Apr 01 '13 at 17:58
@user287107. Tried the same. But as I told earlier, I'm not getting the message box. — Navaneeth Krish, Apr 01 '13 at 18:05

score 1 · Accepted Answer · answered Apr 01 '13 at 17:59

1

You will have to spawn a parallel thread to check if the process exit in that parallel thread. the following method will do the trick. To ensure that you dont block the program, invoke it from a parallel thread

    public  void  CheckProc() 
    {
        while (true)
        {
            if (process.HasExited == true)
            {
                MessageBox.Show("Process done successfully!");
                break;
            }

        }
    }

Also go through http://msdn.microsoft.com/en-us/library/system.diagnostics.process.hasexited.aspx

answered Apr 01 '13 at 17:59

Dhawalk

1,257
13
28

Thanks @Dhawalk. I did as you said. But still, the exception prevails. What shall be done? – Navaneeth Krish Apr 01 '13 at 18:05
oops! Sorry @Dhawalk. I commented my way of starting the process and used process.Start(); and it works out perfectly :) Thanks! – Navaneeth Krish Apr 01 '13 at 18:07
@Dhawalk.. I need another help yaar! Hope you could help me.. How do I add a Marquee progress bar until my process gets terminated? – Navaneeth Krish Apr 01 '13 at 18:11
Take a look at http://stackoverflow.com/questions/312936/windows-forms-progressbar-easiest-way-to-start-stop-marquee – Dhawalk Apr 01 '13 at 18:20

Getting notified about program termination

1 Answers1