Question

how to return string onclosing winform (.net 2)

for example winform_1 opens winform_2, onclosing winform_2 returns a string to winform_1. please keep in mind no Dialog box.

thank you.

Answer 1

“Return” suggests that something within the first form is blocking on the second form, which sounds odd to me if it’s not a dialog.

One thing you could do is have a string property within the second form, then do:

// In FirstForm.cs
secondForm.FormClosing += HandleSecondFormClosing;

...

private void HandleSecondFormClosing(object sender, EventArgs e)
{
    // Or just use your existing reference to the second form, if you
    // still have it
    SecondForm form = (SecondForm) sender;

    // Or whatever else you want to do with the result in SecondForm.
    // OperationResult is the name of the string property you've put
    // in SecondForm.
    result.Text = form.OperationResult;
}

Obviously rename all of these arbitrary names to something more meaningful…