How do I close a form after I open another form

Question

So let's say I clicked a button and it's supposed to open a new form and close the current form.

private void button1_Click(object sender, EventArgs e)
{
    this.Close();
    Form2 AFormInstance = new Form2();
    AFormInstance.Show();
}

I tried this.Close() but what ended up happening was both forms closed. How do I open Form2 and close Form1?

have you tried this.Close(); after you instantiate the new form and display it? — ProgrammingDude, Jan 15 '16 at 15:14
Yeah I tried placing my `this.Close()` call after I instantiated the new form. It still closed both. — puretppc, Jan 15 '16 at 15:15

score 0 · Answer 1 · answered Jan 15 '16 at 15:16

0

If the parent of Button1 is Form1 you can use :

var formToBeClosed = ((sender as Button).Parent) as Form;
formToBeClosed.Close();

answered Jan 15 '16 at 15:16

Mihai-Daniel Virna

964
8
18

Jef Patat · Answer 2 · 2016-01-15T15:33:01.803

-2

Just switch some lines:

private void button1_Click(object sender, EventArgs e)
{
    Form2 AFormInstance = new Form2();
    AFormInstance.Show();
    this.Close();
}

Edit: On further thought: aren't you accidentally closing your main form?

Change the default code of program.cs to:

    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Form1 form1 = new Form1();
        form1.Show();
        Application.Run();
    }

To close the application use:

Application.Exit();

edited Jan 15 '16 at 15:33

answered Jan 15 '16 at 15:15

Jef Patat

959
1
9
24

will this not refer to the current instance therefore closing AFormInstance? – Mihai-Daniel Virna Jan 15 '16 at 15:16
No. The eventhandler is on Form1, so it will close the form1 instance – Jef Patat Jan 15 '16 at 15:33

How do I close a form after I open another form

2 Answers2