xbonez xbonez -4 years ago 44
C# Question

How can I make execution pause until new form is closed?

I am making a Win Forms application to learn more since I don't have much experience with it. In my program, in the main form, I have a button. Clicking it launches another form. The code is as follows:

private void btn_AddCat_Click(object sender, EventArgs e)
{
this.Invoke(new MethodInvoker(() =>
{
form_NewCat NewCatForm = new form_NewCat();
NewCatForm.Show();
}));

MessageBox.Show("Oops!");
}


The problem is, when the new form is launched, I want execution of the code behind the main form to pause at that point until the new form is closed. As an example, in the above code, I do not want 'Oops!' to get printed until the new form is closed. How can I achieve that?

Answer Source

You don't need to invoke when you are in the UI thread. And you are in the UI thread in a button-click eventhandler.

private void btn_AddCat_Click(object sender, EventArgs e)
{
    form_NewCat NewCatForm = new form_NewCat();
    var dialogResult = NewCatForm.ShowDialog();
    MessageBox.Show("Oops!");            
}

You can check the dialogResult for OK, Cancel, Yes, No, etc if your form_NewCat sets this.DialogResult to any value before closing. This is the usual way to signal how the user exited the form/dialog.

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