18位号码：
1 private static bool CheckIDCard18(string Id) 2 { 3 long n = 0; 4 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) 5 { 6 return false; 7 } 8 string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91"; 9 if (address.IndexOf(Id.Remove(2)) == -1) 10 { 11 return false; 12 } 13 string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-"); 14 DateTime time = new DateTime(); 15 if (DateTime.TryParse(birth, out time) == false) 16 { 17 return false; 18 } 19 string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(','); 20 string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(','); 21 char[] Ai = Id.Remove(17).ToCharArray(); 22 int sum = 0; 23 for (int i = 0; i < 17; i++) 24 { 25 sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString()); 26 } 27 int y = -1; 28 Math.DivRem(sum, 11, out y); 29 if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower()) 30 { 31 return false; 32 } 33 return true;//正确 34 }
15位号码：
private static bool CheckIDCard15(string Id) { long n = 0; if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14)) { 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;//正确 }