AutoCAD.Net/C#.Net QQ群:193522571 各种数字的正则表达式类

    public static class StringHelper
    {
  static string sXiaoShuBuFen =@"(\.\d+)?";
  //分数、带分数
  public static string sMatchNumInch = @"(([1-9]\d*-)?[1-9]\d*/[1-9]\d*|[1-9]\d*)""";
  //正整数
  public static string sMatchNumIntPositive = @"[1-9]\d*";
  //整数
  public static string sMatchNumInt = string.Format(@"(-?{0}|0)", sMatchNumIntPositive);
  //数字
  //public static string sMatchNum = @"(-?([1-9]\d*|0))(\.\d+)?";
  public static string sMatchNum = string.Format(@"{0}{1}", sMatchNumInt, sXiaoShuBuFen);
  //负整数
  public static string sMatchNumIntNegative = string.Format(@"-{0}", sMatchNumIntPositive);
  //非负整数
  public static string sMatchNumIntNonNegative = string.Format(@"({0}|0)", sMatchNumIntPositive);
    //非正整数有问题，暂时不要了
    public static string sMatchNumIntNonPositive = string.Format(@"^(-{0}|0)$", sMatchNumIntPositive);
  //正数
  //统一不好的是识别001
  //public static string sMatchNumPositive = string.Format(@"[1-9]\d*.\d*|0.\d*[1-9]\d*");
  public static string sMatchNumPositive = string.Format(@"({0}{1}|0(\.\d+))", sMatchNumIntPositive,sXiaoShuBuFen);
  //负数
  public static string sMatchNumNegative = string.Format(@"-({0})", sMatchNumPositive);
  //非负数
  public static string sMatchNumNonNegative = string.Format(@"({0}|0)", sMatchNumPositive);
  //非正数有问题，暂时不要了
  //public static string sMatchNumNonPositive = string.Format(@"^({0}|0)$", sMatchNumNegative);/// <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,
    }
}