C # Example analysis of verifying identity card numbers (correctness)

This article mainly describes the C # verification ID card number correctness of the instance code, including 18-digit number and 15-digit number verification, the need for friends can refer to the following

Today in the QQ space to see a C # language verification 18 ID card number verification method and instance code, smoked some time to learn a bit, personally feel good, so put it down, easy to use later!

18-digit number:

private static bool CheckIDCard18 (string Id) {long n = 0; if (long. TryParse (Id.remove (), out n) = = False | | N < Math.pow (10, 16) | | Long. TryParse (Id.replace (' x ', ' 0 ').      Replace (' X ', ' 0 '), out n) = = False) {return false; The string address = "      11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91 "; if (address.      IndexOf (Id.remove (2)) = =-1) {return false; } String birth = Id.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 = Id.remove (17).      ToCharArray ();      int sum = 0; for (int i = 0; i <; i++) {sum + = Int. Parse (Wi[i]) * Int. Parse (Ai[i].      ToString ());    } int y =-1;  Math.prem (sum, one, out y); if (arrvarifycode[y]! = id.substring (17, 1).      ToLower ()) {return false; } return true;//Correct}

15-digit number:

private static bool CheckIDCard15 (string Id)    {      long n = 0;      if (long. TryParse (Id, out n) = = False | | N < Math.pow (+))      {        return false;      }      string address = " 11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91 ";      if (address. IndexOf (Id.remove (2)) = =-1)      {        return false;      }      string birth = id.substring (6, 6). Insert (4, "-"). Insert (2, "-");      DateTime time = new DateTime ();      if (Datetime.tryparse (birth, out time) = = False)      {        return false;      }      return true;//correct    }

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