Cancel Key press event

Question

How can I return the key?, mean if I want to allow only integer values in the textbox, how can I don\'t allow user to not enter non-integers, regarding, KeyPress

Answer 1

You may use keypress event as below. use e.Handled to true to cancel user input

    private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (!Char.IsDigit(e.KeyChar)) e.Handled = true;
    }