c# - How can I accept the backspace key in the keypress event?

Question

This is my code:

private void txtAdd_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!(char.IsLetter(e.KeyChar)) && !(char.IsNumber(e.KeyChar)) && !(char.IsWhiteSpace(e.KeyChar)))
    {
        e.Handled = true;
    }
}

It allows me to enter letters, numbers and spaces but it doesn't allow me to do backspace. Please help me.

Answer 1

I like to use !Char.IsControl(e.KeyChar) so that all the "control" characters like the backspace key and clipboard keyboard shortcuts are exempted.

If you just want to check for backspace, you can probably get away with:

if (e.KeyChar == (char)8 && ...)