textbox输入限定值的问题

我有一个textbox要用来输入身份证号码，如何限定只能输入数字和字母X呢？

使用RegularExpressionValidator验证控件,绑定textbox,在validationExpretion中选择身份证就OK了.
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
             //在這里寫代碼
        }
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (textBox1.SelectionLength == 0)
            {
                e.Handled = (e.KeyChar < '0' || e.KeyChar > '9' || textBox1.Text.Length > 17);
                if (e.KeyChar == (Char)Keys.Back || e.KeyChar == 'X')
                {
                    e.Handled = false;
                }
            }
        }