如何控制文本框只能输入数字

定义文本框的KeyPress事件

private void txtDateEmployed_KeyPress(object sender, KeyPressEventArgs e)
{
            //获取按键的ASCII值
          int ascii = (int)e.KeyChar;
            if (ascii >= 48 && ascii <= 57 )
            {
                //允许输入
             e.Handled = false;
            }
            else
            {
                e.Handled = true;
            }
}