private void txt_qty_KeyPress(object sender, KeyPressEventArgs e)
{
if (!(KeyPressJudge.IsNum(e.KeyChar) || KeyPressJudge.IsKeyBord(e.KeyChar)))
{
e.Handled = true;
}
}
private void txtStudentID_KeyPress(object sender, KeyPressEventArgs e)
{
if (KeyPressJudge.IsEnglish(e.KeyChar) || KeyPressJudge.IsBackKey(e.KeyChar) || KeyPressJudge.IsKeyBord(e.KeyChar) ||
KeyPressJudge.IsEnter(e.KeyChar) || KeyPressJudge.IsNum(e.KeyChar) || e.KeyChar == 8 || Char.IsDigit(e.KeyChar))
{
}
else
{
e.Handled = true;
}
}