public static class StringHelper
    {
        //分数、带分数
        public static string sMatchNumInch = @"(([1-9]\d*-)?[1-9]\d*/[1-9]\d*|[1-9]\d*)""";
        //数字
        public static string sMatchNum = @"((-|)([1-9]+\d*|0)(\.\d+)?|0)";
        //整数
        public static string sMatchNumInt = @"((|-)[1-9]+(\d+)?|0)";
        //正整数
        public static string sMatchNumIntPositive = @"([1-9]+(\d+)?)";
        //负整数
        public static string sMatchNumIntNegative = @"(-[1-9]+(\d+)?)";
        //非负整数
        public static string sMatchNumIntNonNegative = @"([1-9]+(\d+)?|0)";
        //非正整数
        public static string sMatchNumIntNonPositive = @"(-[1-9]+(\d+)?|0)";
        //正数
        public static string sMatchNumPositive = @"(([1-9]+\d*)?((|0)\.\d+)?)";
        //负数
        public static string sMatchNumNegative = @"(-([1-9]+\d*|0)(\.\d+)?)";
        //非负数
        public static string sMatchNumNonNegative = @"(([1-9]+\d*)?((|0)\.\d+)?)";
        //非正数
        public static string sMatchNumNonPositive = @"(-([1-9]+\d*|0)(\.\d+)?|0)";
        /// <summary>
        /// 判断字符串是否是数字
        /// </summary>
        /// <param name="str"></param>
        /// <param name="nt"></param>
        /// <returns></returns>
        /// <summary>
        public static bool IsNumType(this string str, NumType nt)
        {
            if (str == "")
                return false;
            string matchString = "";
            switch (nt)
            {
                case NumType.Number:
                    //数字  
                    matchString = sMatchNum;
                    break;
                case NumType.PositiveInt:
                    //正整数
                    matchString = sMatchNumIntPositive;
                    break;
                case NumType.NonNegativeInt:
                    //非负整数（正整数 + 0）  
                    matchString = sMatchNumIntNonNegative;
                    break;
                case NumType.NonPositiveInt:
                    //非正整数（负整数 + 0）  
                    matchString = sMatchNumIntNonPositive;
                    break;
                case NumType.NegativeInt:
                    //负整数  
                    matchString = sMatchNumIntNegative;
                    break;
                case NumType.Int:
                    //整数
                    matchString = sMatchNumInt;
                    break;
                case NumType.NonNegative:
                    //非负数（正数 + 0）  
                    matchString = sMatchNumNonNegative;
                    break;
                case NumType.Positive:
                    //正数  
                    matchString = sMatchNumPositive;
                    break;
                case NumType.NonPositive:
                    //非正数（负数 + 0）
                    matchString = sMatchNumNonPositive;
                    break;
                case NumType.Negative:
                    //负数
                    matchString = sMatchNumNegative;
                    break;
                default:
                    break;
            }
            return Regex.IsMatch(str, matchString, RegexOptions.IgnoreCase);
        }
    /// <summary>
    /// 第1位：9表示“非”，1表示“数”，2表示“整数”
    /// 末位：1表示正，0表示负
    /// </summary>
    public enum NumType
    {
        /// <summary>
        /// 浮点数
        /// </summary>
        Number = 1,
        /// <summary>
        /// 整数
        /// </summary>
        Int = 2,
        /// <summary>
        /// 正数
        /// </summary>
        Positive = 11,
        /// <summary>
        /// 负数
        /// </summary>
        Negative = 10,
        /// <summary>
        /// 正整数
        /// </summary>
        PositiveInt = 21,
        /// <summary>
        /// 负整数
        /// </summary>
        NegativeInt = 20,
        /// <summary>
        /// 非正数
        /// </summary>
        NonPositive = 911,
        /// <summary>
        /// 非负数
        /// </summary>
        NonNegative = 910,
        /// <summary>
        /// 非正整数
        /// </summary>
        NonPositiveInt = 921,
        /// <summary>
        /// 非负整数
        /// </summary>
        NonNegativeInt = 920,
    }
}