我正在运行一个服务器，我想显示我自己的IP地址。
获取计算机自身(如果可能的话，外部)IP地址的语法是什么?
有人编写了以下代码。
IPHostEntry host;
string localIP = "?";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily.ToString() == "InterNetwork")
{
localIP = ip.ToString();
}
}
return localIP;
然而，我通常不信任作者，我不理解这段代码。有更好的方法吗?
当前回答
试试这个:
IPAddress[] localIPs = Dns.GetHostAddresses(Dns.GetHostName());
String MyIp = localIPs[0].ToString();
其他回答
using System.Net;
string host = Dns.GetHostName();
IPHostEntry ip = Dns.GetHostEntry(host);
Console.WriteLine(ip.AddressList[0].ToString());
刚在我的机器上测试过了，还能用。
using System;
using System.Net;
namespace IPADDRESS
{
class Program
{
static void Main(string[] args)
{
String strHostName = string.Empty;
if (args.Length == 0)
{
/* First get the host name of local machine.*/
strHostName = Dns.GetHostName();
Console.WriteLine("Local Machine's Host Name: " + strHostName);
}
else
{
strHostName = args[0];
}
/* Then using host name, get the IP address list..*/
IPHostEntry ipEntry = Dns.GetHostByName(strHostName);
IPAddress[] addr = ipEntry.AddressList;
for (int i = 0; i < addr.Length; i++)
{
Console.WriteLine("IP Address {0}: {1} ", i, addr[i].ToString());
}
Console.ReadLine();
}
}
}
namespace NKUtilities
{
using System;
using System.Net;
using System.Net.Sockets;
public class DNSUtility
{
public static int Main(string [] args)
{
string strHostName = "";
try {
if(args.Length == 0)
{
// Getting Ip address of local machine...
// First get the host name of local machine.
strHostName = Dns.GetHostName();
Console.WriteLine ("Local Machine's Host Name: " + strHostName);
}
else
{
// Otherwise, get the IP address of the host provided on the command line.
strHostName = args[0];
}
// Then using host name, get the IP address list..
IPHostEntry ipEntry = Dns.GetHostEntry (strHostName);
IPAddress [] addr = ipEntry.AddressList;
for(int i = 0; i < addr.Length; i++)
{
Console.WriteLine("IP Address {0}: {1} ", i, addr[i].ToString());
}
return 0;
}
catch(SocketException se)
{
Console.WriteLine("{0} ({1})", se.Message, strHostName);
return -1;
}
catch(Exception ex)
{
Console.WriteLine("Error: {0}.", ex.Message);
return -1;
}
}
}
}
详情请看这里。
你必须记住你的电脑可以有多个IP(实际上它总是这样)-所以你是哪一个。
清洁和一体解决方案:D
//This returns the first IP4 address or null
return Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(ip => ip.AddressFamily == AddressFamily.InterNetwork);
另一种获取公共IP地址的方法是使用OpenDNS的resolve1.opendns.com服务器，并将myip.opendns.com作为请求。
在命令行上，这是:
nslookup myip.opendns.com resolver1.opendns.com
或者在c#中使用DNSClient nuget:
var lookup = new LookupClient(new IPAddress(new byte[] { 208, 67, 222, 222 }));
var result = lookup.Query("myip.opendns.com", QueryType.ANY);
这比敲击http端点并解析响应要简洁一些。
