获取本地IP地址 [英] Get local IP address

问题描述

在互联网有几个地方，告诉你如何获得一个IP地址。而他们中的很多像这样的例子：

In the internet there are several places that show you how to get an IP address. And a lot of them look like this example:

String strHostName = string.Empty;
// 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);
// 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());
}
Console.ReadLine();

通过这个例子，我得到几个IP地址，但我只让路由器分配给计算机运行的程序之一感兴趣的是：如果他愿意访问共享文件夹中，我会给别人的IP我的电脑的实例。

With this example I get several IP addresses, but I'm only interested in getting the one that the router assigns to the computer running the program: the IP that I would give to someone if he wishes to access a shared folder in my computer for instance.

如果我没有连接到网络上，我通过不带路由器的调制解调器，直接连接到互联网，然后我想获得一个错误。我怎么能看看我的计算机连接到与C＃的网络，如果是则获得LAN IP地址。

If I am not connected to a network and I am connected to the internet directly via a modem with no router then I would like to get an error. How can I see if my computer is connected to a network with C# and if it is then to get the LAN IP address.

推荐答案

要获取本地IP地址：

public static string GetLocalIPAddress()
    {
        var host = Dns.GetHostEntry(Dns.GetHostName());
        foreach (var ip in host.AddressList)
        {
            if (ip.AddressFamily == AddressFamily.InterNetwork)
            {
                return ip.ToString();
            }
        }
        throw new Exception("Local IP Address Not Found!");
    }

要检查您是否连接与否：

To check if you're connected or not:

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable（）;

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