我想在文本框中输入数字,其他字符不允许输入.
问题是"-"和"."怎么也输入不到文本框里.不知道是什么原因?
实现见下面:
        private void txtbFdz_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!funIsSng((Keys)e.KeyChar))
                e.KeyChar = (char)Keys.None;
        }
        public bool funIsSng(Keys keySng)      //判断键盘按下的是不是输入的实数
        {
            switch (keySng)
            {
                case Keys.D0:
                    return (true);
                case Keys.D1:
                    return (true);
                case Keys.D2:
                    return (true);
                case Keys.D3:
                    return (true);
                case Keys.D4:
                    return (true);
                case Keys.D5:
                    return (true);
                case Keys.D6:
                    return (true);
                case Keys.D7:
                    return (true);
                case Keys.D8:
                    return (true);
                case Keys.D9:
                    return (true);
                case Keys.Back:
                    return (true);
                case Keys.Subtract:
                    return (true);
                case Keys.Decimal:
                    return (true);
                default:
                    return (false);
            }
        }

Keys.Subtract   Keys.Decimal表示的是小键盘上的减号和小数点，没按错呗？

哦,请问如果不区分主键盘和小键盘时 输入负号和数据点应该是什么???谢谢

e.keychar=='-'

Thank you,heihei1314.