后台自动获取IP及当前城市

Question

 public class Configs
    {
public static string GetCity() 
        {
            System.Net.IPAddress addr;
            // 获得拨号动态分配IP地址 
            addr = new System.Net.IPAddress(Dns.GetHostByName(Dns.GetHostName()).AddressList[1].Address);
            return addr.ToString(); 
        }
    }这个方法报错：索引超出了数组界限Ip城市地址

Answer 1

你单步调试看看AddressList的值，你要的值可能存在于AddressList[0]中

Answer 2

Dns.GetHostByName(Dns.GetHostName()).AddressList[0]
{192.168.0.234}
    Address: 3925911744
    AddressFamily: InterNetwork
    IsIPv6LinkLocal: false
    IsIPv6Multicast: false
    IsIPv6SiteLocal: false
    IsIPv6Teredo: false
    ScopeId: “Dns.GetHostByName(Dns.GetHostName()).AddressList[0].ScopeId”引发了“System.Net.Sockets.SocketException”类型的异常
Dns.GetHostByName(Dns.GetHostName()).AddressList[1]
数组索引超出界限
Dns.GetHostByName(Dns.GetHostName()).AddressList[2]
数组索引超出界限
Dns.GetHostByName(Dns.GetHostName()).AddressList[3]
数组索引超出界限

Answer 3

//直接一句话
public static string GetCity() 
{
        return new StreamReader(WebRequest.Create("http://iframe.ip138.com//ic.asp").GetResponse().GetResponseStream(),Encoding.Default).ReadToEnd();
}

Answer 4

改成这样试试：
addr = new System.Net.IPAddress(Dns.GetHostByName(Dns.GetHostName()).AddressList[0]);