后台根据身份证号码截取性别和出生日期

if (filter.zjType == 身份证)
{
int sex = Convert.ToInt32(filter.zjType.Substring(14, 1));
filter.HyXb = sex % 2 == 0 ? 1 : 0;
string chushengdate = filter.zjLx.Substring(6, 8);
filter.ChushengDate = DateTime.ParseExact(chushengdate, "yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture);
}

////获取IP地址的方法
string hostname;
System.Net.IPHostEntry localhost;
System.Net.IPAddress localaddr;
hostname = System.Net.Dns.GetHostName();
localhost = System.Net.Dns.GetHostByName(hostname);
localaddr = localhost.AddressList[0];