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
private static string GetLocalIpAdresse()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach(var ip in host.AddressList)
{
if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception ("No network adapters with an IPv4 address in the system");
}
其他回答
不，这几乎是最好的方法。由于一台机器可能有多个IP地址，您需要迭代它们的集合以找到合适的一个。
编辑:我唯一想改变的是改变这个:
if (ip.AddressFamily.ToString() == "InterNetwork")
:
if (ip.AddressFamily == AddressFamily.InterNetwork)
不需要ToString一个枚举进行比较。
这是在VB中获取所有本地ip的csv格式。网
Imports System.Net
Imports System.Net.Sockets
Function GetIPAddress() As String
Dim ipList As List(Of String) = New List(Of String)
Dim host As IPHostEntry
Dim localIP As String = "?"
host = Dns.GetHostEntry(Dns.GetHostName())
For Each ip As IPAddress In host.AddressList
If ip.AddressFamily = AddressFamily.InterNetwork Then
localIP = ip.ToString()
ipList.Add(localIP)
End If
Next
Dim ret As String = String.Join(",", ipList.ToArray)
Return ret
End Function
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。
LINQ解决方案:
Dns.GetHostEntry(Dns.GetHostName()).AddressList.Where(ip => ip.AddressFamily == AddressFamily.InterNetwork).Select(ip => ip.ToString()).FirstOrDefault() ?? ""
private static string GetLocalIpAdresse()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach(var ip in host.AddressList)
{
if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception ("No network adapters with an IPv4 address in the system");
}
