/// <summary>
    /// 正則表示式驗證類
    /// </summary>
    public static class RegexHelper
    {
        /// <summary>
        /// 是否為郵箱地址
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsEmail(string str)
        {
            
 
var tmpRegex = new System.Text.RegularExpressions.Regex(@"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$");
            return tmpRegex.IsMatch(str);
        }

        /// <summary> 
        /// 驗證日期 
        /// </summary> 
        /// <param name="source"></param> 
        /// <returns></returns>
 
 
        public static bool IsDateTime(string source)
        {
            try
            {
                var time = Convert.ToDateTime(source);
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
 
 
        /// 驗證手機號 
        /// </summary> 
        /// <param name="source"></param> 
        /// <returns></returns> 
        public static bool IsMobile(string source)
        {
            return Regex.IsMatch(source, @"^1[3456789]\d{9}$", RegexOptions.IgnoreCase);
        }

        /// <summary> 
        /// 驗證身份證是否有效 
        /// </summary> 
        /// <param name="Id"></param> 
        /// <returns></returns> 
        public static bool IsIDCard(string Id)
        {
            if (Id.Length == 18)
            {
                var check = IsIdCard18(Id);
                return check;
            }
            else if (Id.Length == 15)
            {
                var check = IsIdCard15(Id);
                return check;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 驗證18位身份證號
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public static bool IsIdCard18(string Id)
        {
            long n = 0;
            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) ||
                long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
            {
                return false; //數字驗證 
            }
            var address =
                "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2), System.StringComparison.Ordinal) == -1)
            {
                return false; //省份驗證 
            }
            var birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
            var time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
            {
                return false; //生日驗證 
            }
            var arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
            var Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
            var Ai = Id.Remove(17).ToCharArray();
            var sum = 0;
            for (var i = 0; i < 17; i++)
            {
                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
            }
            var y = -1;
            Math.DivRem(sum, 11, out y);
            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
            {
                return false; //校驗碼驗證 
            }
            return true; //符合GB11643-1999標準 
        }

        /// <summary>
        /// 驗證15位身份證號
        /// </summary>
        /// <param name="Id"></param>
        /// <returns></returns>
        public static bool IsIdCard15(string Id)
        {
            long n = 0;
            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
            {
                return false; //數字驗證 
            }
            var address =
                "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2), System.StringComparison.Ordinal) == -1)
            {
                return false; //省份驗證 
            }
            var birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
            var time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
            {
                return false; //生日驗證 
            }
            return true; //符合15位身份證標準 
        }

        /// <summary> 
        /// 是不是中國電話，格式010-85849685 
        /// </summary> 
        /// <param name="source"></param> 
        /// <returns></returns> 
        public static bool IsTel(string source)
        {
            return Regex.IsMatch(source, @"^\d{3,4}-?\d{6,8}$", RegexOptions.IgnoreCase);
        }
    }