how can i code for red cancel button?

Question

3.50/5 (2 votes)

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my application creates some processess, i want to kill them when user click on red cancel button of my form. so i write the code in Form1_FormClosing() but no result. The code i wrote in the function is correct, i have checked it.

C#

private void Form1_FormClosing(Object sender, FormClosingEventArgs e)
{

    int i = 0;
    while (i < p.MyProcess.Count)
    {
        if (!p.MyProcess[i].HasExited)
        {
            p.MyProcess[i].Kill();
            p.MyProcess[i].Close();

        }
        i++;
    }
    p.MyProcess.Clear();
}

Posted 19-Nov-11 6:32am

Sweety Khan

Updated 20-Nov-11 6:46am

v2

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Sander Rossel · Accepted Answer · 2011-11-19T06:37:00

Solution 1

In your Button.Click Event Handler?
Or perhaps in a Method you call from your Event Handler, depending on your taste.

C#

private void button_Click(Object sender, EventArgs e)
{
    // Code goes here.
}

Or, if you like:

C#

private void button_Click(Object sender, EventArgs e)
{
    KillProcesses();
}

private void KillProcesses()
{
    // Code goes here.
}

If you need this exact piece of code in multiple Forms or Classes, consider placing it in a seperate Class and making it static (assuming you don't need instance fields to kill processes).

Posted 19-Nov-11 6:37am

Sander Rossel

Comments

Sweety Khan 19-Nov-11 12:51pm

yeh i know but this button is a button which i will place on my form from toolbox, but i want to code for the red cancel button of my dialog box

Sander Rossel 19-Nov-11 13:19pm

You didn't mention that dialog box in your question.
However, a DialogBox should not have any functionality. Like, for example, MessageBox.Show("Test here.") is a Function that returns a DialogResult you should also program your own DialogBox (or are you using MessageBox?).
In that case, you would get something like this:
if (MessageBox.Show("Are you sure you want to kill the processes?") == DialogResult.Yes)
{
// Kill the processes.
}

Sweety Khan 19-Nov-11 13:23pm

dialog box means my main form's red cancel button which is by default with the form

Uday P.Singh 19-Nov-11 13:34pm

what do you mean by red cancel button which is by default with the form? are you talking about the red cross button for closing?

Sweety Khan 19-Nov-11 18:57pm

yes exactly

Sander Rossel 19-Nov-11 13:38pm

I think you are messing things up...
Anyway, to kill the processes when your Form closes use the Form.FormClosing Event.
To kill them only when your application closes you can use the application events.

Sweety Khan 20-Nov-11 12:59pm

thanxx its done by using Form.FormClosing Event. i was not accessing it from form properties thats why it was not working