身份证校验

  1 namespace CheckIdenoDemo
  2 {
  3     class Program
  4     {
  5         static void Main(string[] args)
  6         {
  7             Console.WriteLine("请输入您的18位身份证号码:");
  8             string readstring = Console.ReadLine();
  9 
 10             IdentifyCheck idenCheck = new IdentifyCheck();
 11 
 12             idenCheck.Identity = readstring;
 13             if (idenCheck.Identity == null)
 14             {
 15                 Console.WriteLine("错误码：" + idenCheck.ErrCode + ",错误信息：" + idenCheck.ErrMsg);
 16                 Console.ReadKey();
 17                 return;
 18             }
 19 
 20             char checkPoint = idenCheck.CheckMethod();
 21 
 22             Console.WriteLine("检验码为：" + checkPoint);
 23             Console.WriteLine("您输入的码为：" + idenCheck.Identity.Substring(17, 1));
 24 
 25             Console.ReadKey();
 26         }
 27     }
 28 
 29     class IdentifyCheck
 30     {
 31         #region 属性
 32         //错误码
 33         private int errCode = 0;
 34         public int ErrCode
 35         {
 36             get
 37             {
 38                 return this.errCode;
 39             }
 40             set
 41             {
 42                 this.errCode = value;
 43             }
 44         }
 45 
 46         //错误信息
 47         private string errMsg = string.Empty;
 48         public string ErrMsg
 49         {
 50             get
 51             {
 52                 return this.errMsg;
 53             }
 54             set
 55             {
 56                 this.errMsg = value;
 57             }
 58         }
 59 
 60         //身份证号码
 61         private string identity;
 62         public string Identity
 63         {
 64 
 65             get 
 66             {
 67                 return this.identity;
 68             }
 69 
 70             set
 71             {
 72                 if (value == string.Empty || value.Trim() == string.Empty || value.Trim() == "")
 73                 {
 74                     this.ErrCode = -1;
 75                     this.ErrMsg = "身份证号码为空";
 76                     return ;
 77                 }
 78                 if (value.Length != 18)
 79                 {
 80                     this.ErrCode = -1;
 81                     this.ErrMsg = "身份证号码不够18位";
 82                     return ;
 83                 }
 84                 this.identity = value;
 85             }
 86         }
 87 
 88         #endregion
 89 
 90         #region 成员变量
 91 
 92         //权值
 93         int[] Weight = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
 94 
 95         //校验码对照
 96         char[] validate = { ‘1‘, ‘0‘, ‘X‘, ‘9‘, ‘8‘, ‘7‘, ‘6‘, ‘5‘, ‘4‘, ‘3‘, ‘2‘ };
 97 
 98         #endregion
 99 
100         #region 方法
101 
102         /// <summary>
103         /// 身份证校验算法
104         /// </summary>
105         /// <returns></returns>
106         public char CheckMethod()
107         {
108             int mode = 0;
109             int sum = 0;
110             //17位基本数字加权求和
111             for (int i = 0; i < this.Identity.Length - 1; i++)
112             {
113                 sum += int.Parse(this.Identity.Substring(i, 1)) * Weight[i];
114             }
115 
116             //计算模
117             mode = sum % 11;
118 
119 
120             return validate[mode];
121         }
122 
123         #endregion
124     }
125 }