/// 
        /// 判断一个字符串是否是正整数        /// 
        ///         /// 
            public static bool IsInteger(string s)        {            string pattern = @"^\d*$";            return System.Text.RegularExpressions.Regex.IsMatch(s, pattern);        }        /// 
        /// 判断一个字符串是否为合法数字(0-32整数)        /// 
        /// 字符串        /// 
            public static bool IsNumber(string s)        {            return IsNumber(s, 32, 0);        }        /// 
        /// 判断一个字符串是否为合法数字(指定整数位数和小数位数)        /// 
        /// 字符串        /// 整数位数        /// 小数位数        /// 
            public static bool IsNumber(string s, int precision, int scale)        {            if ((precision == 0) && (scale == 0))            {                return false;            }            string pattern = @"(^\d{1," + precision + "}";            if (scale > 0)            {                pattern += @"\.\d{0," + scale + "}$)|" + pattern;            }            pattern += "$)";            return System.Text.RegularExpressions.Regex.IsMatch(s, pattern);        }