身份证号码验证帮助类（公共方法） 

  1 /// <summary>
  2     /// 身份证帮助类
  3     /// </summary>
  4     public class IDCardHelper
  5     {
  6         #region 检测身份证的合法性
  7         public static bool Check(string cardId)
  8         {
  9             string num = cardId.ToUpper();
 10             int[] factorArr = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 };
 11             char[] parityBit = new char[] { '1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' };
 12             char[] varArray = new char[18];
 13             var lngProduct = 0;
 14             int intCheckDigit = 0;
 15             var intStrLen = num.Length;
 16             var idNumber = num;
 17             if ((intStrLen != 15) && (intStrLen != 18))
 18             {
 19                 return false;
 20             }
 21          
 22             for (int i = 0; i < intStrLen; i++)
 23             {
 24                 varArray[i] = (char)Convert.ToInt32(idNumber[i]);
 25                 if (((varArray[i] - 48) < 0 || (varArray[i] - 48) > 9) && (i != 17))
 26                 {
 27                     return false;
 28                 }
 29                 else if (i < 17)
 30                 {
 31                     varArray[i] = (char)((varArray[i] - 48) * factorArr[i]);
 32                 }
 33             }
 34             if (intStrLen == 18)
 35             {
 36                 var date8 = idNumber.Substring(6, 8);
 37                 if (isDate8(date8) == false)
 38                 {
 39                     return false;
 40                 }
 41                 for (int i = 0; i < 17; i++)
 42                 {
 43                     lngProduct = lngProduct + varArray[i];
 44                 }
 45                 intCheckDigit = parityBit[lngProduct % 11];
 46                 if (varArray[17] != intCheckDigit)
 47                 {
 48                     return false;
 49                 }
 50             }
 51             else
 52             {       
 53                 var date6 = idNumber.Substring(6, 6);
 54                 if (isDate6(date6) == false)
 55                 {
 56                     return false;
 57                 }
 58             }
 59             return true;
 60         }
 61         #endregion 
 62 
 63         #region 位身份证日期检测--年/月--6位
 64         /// <summary>
 65         /// 15位身份证日期检测--年/月--6位
 66         /// </summary>
 67         /// <param name="sDate"></param>
 68         /// <returns></returns>
 69         static bool isDate6(string sDate)
 70         {
 71             if (!System.Text.RegularExpressions.Regex.IsMatch(sDate, "^[0-9]{6}$"))
 72             {
 73                 return false;
 74             }
 75             int year = Convert.ToInt32(sDate.Substring(0, 4));
 76             int month = Convert.ToInt32(sDate.Substring(4, 2));
 77             if (year < 1700 || year > 2500) return false;
 78             if (month < 1 || month > 12) return false;
 79             return true;
 80         }
 81         #endregion
 82 
 83         #region 18位身份证日期检测--年/月/日--8位
 84         /// <summary>
 85         /// 18位身份证日期检测--年/月/日--8位
 86         /// </summary>
 87         /// <param name="sDate"></param>
 88         /// <returns></returns>
 89         static bool isDate8(string sDate)
 90         {
 91             if (!System.Text.RegularExpressions.Regex.IsMatch(sDate, "^[0-9]{8}$"))
 92             {
 93                 return false;
 94             }
 95             int year  = Convert.ToInt32(sDate.Substring(0, 4));
 96             int month = Convert.ToInt32(sDate.Substring(4, 2));
 97             int day   = Convert.ToInt32(sDate.Substring(6, 2));
 98 
 99             int[] iaMonthDays = new int[] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
100             if (year < 1700 || year > 2500) return false;
101             if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) iaMonthDays[1] = 29;
102             if (month < 1 || month > 12) return false;
103             if (day < 1 || day > iaMonthDays[month - 1]) return false;
104             return true;
105         }
106         #endregion
107 
108         #region 根据身份证号码获取年龄、生日
109         public static DateTime? GetBirthday(string cardId)
110         {
111             bool result = Check(cardId);
112             if (result)
113             {
114                 int year = Convert.ToInt32(cardId.Substring(6, 4));
115                 int month = Convert.ToInt32(cardId.Substring(10, 2));
116                 int day = Convert.ToInt32(cardId.Substring(12, 2));
117                 return new DateTime(year, month, day);
118             }
119             return null;
120         }
121         #endregion
122     }

 

posted @ 2019-09-23 21:20  醉酒三分醒  阅读(416)  评论(0)    收藏  举报