小数点的控制

Question

Decimal型的如何控制小数点呀，有小数就显示，没小数就不显示小数点

Answer 1

            if(Regex.Match("12.10","[0-9]+[\\.][0-9]+").Success)
            {
                成功显示
            }
            else
            {
                不显示
            }

Answer 2

如果有固定小数位数用.ToString().TrimEnd('0').TrimEnd('.')
否则.ToString()
不要小数点用.ToString(".")

Answer 3

             decimal a=12.10M;
            if(Regex.Match(a.ToString(),"[0-9]+[\\.][0-9]+").Success)
            {
               MessageBox.Show(a.ToString());
            }
            else
            {
                MessageBox.Show( Regex.Match(a.ToString(),"[0-9]+(?=\\.)").Value);
            }