asp.net身份证号码验证(转载)

private string GetCard(string cid)
{
if (cid.Length == 15)
{
cid = per15To18(cid);
}
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" };
double iSum = 0;
//string info="";
System.Text.RegularExpressions.Regex rg = new System.Text.RegularExpressions.Regex(@"^\d{17}(\d|x)$");
System.Text.RegularExpressions.Match mc = rg.Match(cid);
if (!mc.Success)
{
return "格式不正确!";
//return "";
}
cid = cid.ToLower();
cid = cid.Replace("x", "a");
if (aCity[int.Parse(cid.Substring(0, 2))] == null)
{
return "非法地区";
//return "";
}
try
{
DateTime.Parse(cid.Substring(6, 4) + "-" + cid.Substring(10, 2) + "-" + cid.Substring(12, 2));
}
catch
{
return "非法生日";
//return "";
}
for (int i = 17; i >= 0; i--)
{
iSum += (System.Math.Pow(2, i) % 11) * int.Parse(cid[17 - i].ToString(), System.Globalization.NumberStyles.HexNumber);
}
if (iSum % 11 != 1)
return("非法证号");
//return ("");
return (cid.Substring(6, 4) + "-" + cid.Substring(10, 2) + "-" + cid.Substring(12, 2));
}

private string per15To18(string perIDSrc)
{
int iS = 0;
//加权因子常数
int[] iW = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
//校验码常数
string LastCode = "10X98765432";
//新身份证号
string perIDNew;
perIDNew = perIDSrc.Substring(0, 6);
//填在第6位及第7位上填上‘1’，‘9’两个数字
perIDNew += "19";
perIDNew += perIDSrc.Substring(6, 9);
//进行加权求和
for (int i = 0; i < 17; i++)
{
iS += int.Parse(perIDNew.Substring(i, 1)) * iW[i];
}
//取模运算，得到模值
int iY = iS % 11;
//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。
perIDNew += LastCode.Substring(iY, 1);
return perIDNew;
}
//取得性别
private int CheckSex(string cid)
{
int sex;
int man;
if (cid.Length == 15)
{
man = int.Parse(cid.Substring(14, 1));
}
else if (cid.Length == 18)
{
man = int.Parse(cid.Substring(16, 1));
}
else man = 1;
if (man % 2 == 0) sex = 0;
else sex = 1;
return sex;
}
//实际运用
int sex = CheckSex(IdCard);//性别
string addr = aCity[int.Parse(Business.DLL.Globals.stringLen(IdCard, 0, 2))];//地址
string aa = GetCard(IdCard);//得到生日并且在下面判断
try
{
Convert.ToDateTime(aa);
}
catch (Exception)
{
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
}
DateTime MemberBirthday =Convert.ToDateTime( GetCard(IdCard));//会员生日
TimeSpan tm = (TimeSpan)DateTime.Now.Subtract(MemberBirthday);//会员年龄
int age = (int)(tm.Days)/365;//年龄取得整