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 | 
 
 
 
 public static bool CheckIDNumber(string strIDNumber)
 {
 try
 {
 if (strIDNumber.Length == 15 && CheckIDCard15(strIDNumber))
 {
 return true;
 }
 else if (strIDNumber.Length == 18 && CheckIDCard18(strIDNumber))
 {
 return true;
 }
 else
 {
 return false;
 }
 }
 catch (Exception ex)
 {
 return false;
 }
 }
 
 
 
 
 
 
 private static bool CheckIDCard15(string idNumber)
 {
 long n = 0;
 if (long.TryParse(idNumber, out n) == false || n < Math.Pow(10, 14))
 {
 return false;
 }
 string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
 if (address.IndexOf(idNumber.Remove(2)) == -1)
 {
 return false;
 }
 string birth = idNumber.Substring(6, 6).Insert(4, "-").Insert(2, "-");
 DateTime time = new DateTime();
 if (DateTime.TryParse(birth, out time) == false)
 {
 return false;
 }
 return true;
 }
 
 
 
 
 
 
 private static 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;
 }
 string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
 if (address.IndexOf(idNumber.Remove(2)) == -1)
 {
 return false;
 }
 string birth = idNumber.Substring(6, 8).Insert(6, "-").Insert(4, "-");
 DateTime time = new DateTime();
 if (DateTime.TryParse(birth, out time) == false)
 {
 return false;
 }
 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);
 Console.WriteLine("Y的理论值: " + y);
 if (arrVarifyCode[y] != idNumber.Substring(17, 1).ToLower())
 {
 return false;
 }
 return true;
 }
 
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