Question

I have a following form Form3 that is opened by another form Form1, and when closed Form1 opens back up.

The problem is when I close Form3 DoSomething keeps running after form is closed.

I understand that I can make DoSomething into a thread and set IsBackground = true but is there another way to stop all processes when form closes.

This code is just example, For illustration.

   public partial class Form3 : Form
    {

    public Form3()
    {
        InitializeComponent();
    }
    private void DoSomething()
    {
        int i = 0;
        while(true)
        {
            if (!this.IsDisposed)
            {
                Application.DoEvents();
                i++;
                Thread.Sleep(10);
                label1.Text = i.ToString();
                dataGridView1.Rows.Add();
            }
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        DoSomething();
    }

    private void Form3_FormClosed(object sender, FormClosedEventArgs e)
    {
        this.Dispose();
        Form1.Default.Show();
    }

}

Answer 1

Thanks to cdhowie suggestions and input of all others. Mowing DoEvents to the end and adding IsDipsosed solved my problem.

public partial class Form3 : Form
{
    public Form3()
    {
        InitializeComponent();
    }
    private void DoSomething()
    {
        int i = 0;
        while ((true) && !this.IsDisposed)
        {
                i++;
                Thread.Sleep(10);
                label1.Text = i.ToString();
                dataGridView1.Rows.Add();
                Application.DoEvents();
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        DoSomething();
    }

    private void Form3_FormClosed(object sender, FormClosedEventArgs e)
    {
        Form1.Default.Show();
    }

}