限定TextBox只能输入阿拉伯数字

private void txt_Ecardforegift_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar < '0' || e.KeyChar > '9')
            {
                e.Handled = true;
            }
        }
         
选择TextBox的KeyPress事件,敲入以上代码.及可.其它键盘键的限制输入参考KeyPressEventArgs  MSDN解释.