編程樂趣：社會安全號碼碼驗證的方法

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隨著現在互連網的發展，越來越多的註冊使用者的地方都用到了身份證，那麼對於輸入的身份證如何驗證呢？看下面的代碼，其實很簡單。
主要注意的是，目前的身份證分為16和18位，然後分別驗證校正位，省份，生日即可。
主要類：

/// <summary>    /// 驗證社會安全號碼碼類    /// </summary>    public class IDCardValidation    {        /// <summary>        /// 驗證身份證合理性        /// </summary>        /// <param name="Id"></param>        /// <returns></returns>        public bool CheckIDCard(string idNumber)        {            if (idNumber.Length == 18)            {                bool check = CheckIDCard18(idNumber);                return check;            }            else if (idNumber.Length == 15)            {                bool check = CheckIDCard15(idNumber);                return check;            }            else            {                return false;            }        }        /// <summary>        /// 18位社會安全號碼碼驗證        /// </summary>        private bool CheckIDCard18(string idNumber)        {            long n = 0;            if (long.TryParse(idNumber.Remove(17), out n) == false                 || n < Math.Pow(10, 16) || long.TryParse(idNumber.Replace(‘x‘, ‘0‘).Replace(‘X‘, ‘0‘), out n) == false)            {                return false;//數字驗證            }            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";            if (address.IndexOf(idNumber.Remove(2)) == -1)            {                return false;//省份驗證            }            string birth = idNumber.Substring(6, 8).Insert(6, "-").Insert(4, "-");            DateTime time = new DateTime();            if (DateTime.TryParse(birth, out time) == false)            {                return false;//生日驗證            }            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(‘,‘);            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(‘,‘);            char[] Ai = idNumber.Remove(17).ToCharArray();            int sum = 0;            for (int i = 0; i < 17; i++)            {                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());            }            int y = -1;            Math.DivRem(sum, 11, out y);            if (arrVarifyCode[y] != idNumber.Substring(17, 1).ToLower())            {                return false;//校正碼驗證            }            return true;//符合GB11643-1999標準        }        /// <summary>        /// 16位社會安全號碼碼驗證        /// </summary>        private bool CheckIDCard15(string idNumber)        {            long n = 0;            if (long.TryParse(idNumber, out n) == false || n < Math.Pow(10, 14))            {                return false;//數字驗證            }            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";            if (address.IndexOf(idNumber.Remove(2)) == -1)            {                return false;//省份驗證            }            string birth = idNumber.Substring(6, 6).Insert(4, "-").Insert(2, "-");            DateTime time = new DateTime();            if (DateTime.TryParse(birth, out time) == false)            {                return false;//生日驗證            }            return true;        }     }

測試調用：
 

           IDCardValidation card = new IDCardValidation();            //從網上身份證大全找來的，驗證結果為true            bool result = card.CheckIDCard("522324197508045617");            Console.WriteLine(result.ToString());            //隨便編的，驗證結果為false            result = card.CheckIDCard("612427199901281214");            Console.WriteLine(result.ToString());            Console.ReadLine();