private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
if ( e.KeyChar >(char)Keys.D0 && e.KeyChar <(char)Keys.D9 || e.KeyChar ==(char)Keys.Back || e.KeyChar == (char)Keys.Delete )
{
e.Handled = false;
}
else
{
e.Handled = true;
}
}
{
if ( e.KeyChar >(char)Keys.D0 && e.KeyChar <(char)Keys.D9 || e.KeyChar ==(char)Keys.Back || e.KeyChar == (char)Keys.Delete )
{
e.Handled = false;
}
else
{
e.Handled = true;
}
}
RequiredFieldValidator