winForm textBox的数字输入验证

 方法一：   

    private void txtEmployCode_KeyPress(object sender, KeyPressEventArgs e)
        {
            e.Handled = true;
            if (e.KeyChar >= '0' && e.KeyChar <= '9')
            {
                e.Handled = false;
            }
        }

 方法二：

      public static void NumberAccpter(object sender, KeyPressEventArgs e, bool point)
        {
            int keyChar = e.KeyChar;
            if ((((keyChar >= 0x30) && (keyChar <= 0x39)) || (keyChar == 8)) || (keyChar == 0x2e))
            {
                if (!(point || (keyChar != 0x2e)))
                {
                    e.Handled = true;
                }
                else
                {
                    string text = "";
                    if ((sender != null) && (sender is TextBox))
                    {
                        text = ((TextBox)sender).Text;
                    }
                    if ((text == "") && (keyChar == 0x2e))
                    {
                        e.Handled = true;
                    }
                    else if ((text.IndexOf(".") >= 0) && (keyChar == 0x2e))
                    {
                        e.Handled = true;
                    }
                    else
                    {
                        e.Handled = false;
                    }
                }
            }
            else
            {
                e.Handled = true;
            }
        }