C#判断整数、小数位数的限定

  public static bool IsInteger(string s)
        {

            string pattern = @"^\d*$";

            return Regex.IsMatch(s,pattern);

        }

        /// <summary>

        /// 判断一个字符串是否为合法数字(0-32整数)

        /// </summary>

        /// <param name="s">字符串</param>

        /// <returns></returns>

        public static bool IsNumber(string s)

        {

            return IsNumber(s,32,0);

        }

        /// <summary>

        /// 判断一个字符串是否为合法数字(指定整数位数和小数位数)

        /// </summary>

        /// <param name="s">字符串</param>

        /// <param name="precision">整数位数</param>

        /// <param name="scale">小数位数</param>

        /// <returns></returns>

        public static bool IsNumber(string s,int precision,int scale)

        {

            if((precision == 0)&&(scale == 0))

            {

                return false;

            }

            string pattern = @"(^\d{1,"+precision+"}";

            if(scale>0)

            {

                pattern += @"\.\d{0,"+scale+"}$)|"+pattern;

            }

            pattern += "$)";

            return Regex.IsMatch(s,pattern);

        }