private string GetCard(string cid)
 2     {
 3         if (cid.Length == 15)
 4         {
 5             cid = per15To18(cid);
 6         }
 7         string[] aCity = new string[] { null, null, null, null, null, null, null, null, null, null, null, "北京", "天津", "河北", "山西", "内蒙古", null, null, null, null, null, "辽宁", "吉林", "黑龙江", null, null, null, null, null, null, null, "上海", "江苏", "浙江", "安微", "福建", "江西", "山东", null, null, null, "河南", "湖北", "湖南", "广东", "广西", "海南", null, null, null, "重庆", "四川", "贵州", "云南", "西藏", null, null, null, null, null, null, "陕西", "甘肃", "青海", "宁夏", "新疆", null, null, null, null, null, "台湾", null, null, null, null, null, null, null, null, null, "香港", "澳门", null, null, null, null, null, null, null, null, "国外" };
 8         double iSum = 0;
 9         //string info="";
10          System.Text.RegularExpressions.Regex rg = new System.Text.RegularExpressions.Regex(@"^\d{17}(\d|x)$");
11         System.Text.RegularExpressions.Match mc = rg.Match(cid);
12         if (!mc.Success)
13         {
14             return "格式不正确!";
15             //return "";
16          }
17         cid = cid.ToLower();
18         cid = cid.Replace("x", "a");
19         if (aCity[int.Parse(cid.Substring(0, 2))] == null)
20         {
21             return "非法地区";
22             //return "";
23         }
24         try
25         {
26             DateTime.Parse(cid.Substring(6, 4) + "-" + cid.Substring(10, 2) + "-" + cid.Substring(12, 2));
27         }
28         catch
29         {
30             return "非法生日";
31             //return "";
32         }
33         for (int i = 17; i >= 0; i--)
34         {
35             iSum += (System.Math.Pow(2, i) % 11) * int.Parse(cid[17 - i].ToString(), System.Globalization.NumberStyles.HexNumber);
36         }
37         if (iSum % 11 != 1)
38             return("非法证号");
39             //return ("");
40         return (cid.Substring(6, 4) + "-" + cid.Substring(10, 2) + "-" + cid.Substring(12, 2));
41     }
42
43     private string per15To18(string perIDSrc)
44     {
45         int iS = 0;
46         //加权因子常数
47         int[] iW = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
48         //校验码常数
49         string LastCode = "10X98765432";
50         //新身份证号
51         string perIDNew;
52         perIDNew = perIDSrc.Substring(0, 6);
53         //填在第6位及第7位上填上‘1’，‘9’两个数字
54         perIDNew += "19";
55         perIDNew += perIDSrc.Substring(6, 9);
56         //进行加权求和
57         for (int i = 0; i < 17; i++)
58         {
59             iS += int.Parse(perIDNew.Substring(i, 1)) * iW[i];
60         }
61         //取模运算，得到模值
62         int iY = iS % 11;
63         //从LastCode中取得以模为索引号的值，加到身份证的最后一位，即为新身份证号。
64         perIDNew += LastCode.Substring(iY, 1);
65         return perIDNew;
66     }
67     //取得性别
68     private int CheckSex(string cid)
69     {
70         int sex;
71         int man;
72         if (cid.Length == 15)
73         {
74             man = int.Parse(cid.Substring(14, 1));
75         }
76         else if (cid.Length == 18)
77         {
78             man = int.Parse(cid.Substring(16, 1));
79         }
80         else man = 1;
81         if (man % 2 == 0) sex = 0;
82         else sex = 1;
83         return sex;
84     }
85 //实际运用
86         int sex = CheckSex(IdCard);//性别
87         string addr = aCity[int.Parse(Business.DLL.Globals.stringLen(IdCard, 0, 2))];//地址
88         string aa = GetCard(IdCard);//得到生日并且在下面判断
89         try
90         {
91             Convert.ToDateTime(aa);
92         }
93         catch (Exception)
94         {
95             ph.PageOutBlock("身份证号码有错误的地方", -1);//个人操作类，大家按自己情况修改
96         }
97         DateTime MemberBirthday =Convert.ToDateTime( GetCard(IdCard));//会员生日
98         TimeSpan tm = (TimeSpan)DateTime.Now.Subtract(MemberBirthday);//会员年龄
99         int age = (int)(tm.Days)/365;//年龄取得整