找出活动的本地IP [英] Find out the active local IP

问题描述

由于这个原因，我需要使用以下代码来查找本地IP地址:

I need to find out the local Ip address, for that reason I was using the following code:

IPHostEntry host;
string localIP = "";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
    if (ip.AddressFamily == AddressFamily.InterNetwork)
    {
        localIP = ip.ToString();
        break;
    }
}
return localIP;

我发现，当一台PC的AddressFamily.InterNetwork具有多个IP时，我总是得到第一个IP.但是，我找不到任何属性来查找活动IP.

I find out that when a PC has more than one IP with AddressFamily.InterNetwork I get always the first one. However I can't find any property to find out the active IP.

如何获取正确的IP?

谢谢小费！

推荐答案

    static string GetActiveIP()
            {
                string ip = "";
                foreach (NetworkInterface f in NetworkInterface.GetAllNetworkInterfaces())
                {
                    if (f.OperationalStatus == OperationalStatus.Up)
                    {
                        IPInterfaceProperties ipInterface = f.GetIPProperties();
                        if (ipInterface.GatewayAddresses.Count > 0)
                        {`enter code here`
                            foreach (UnicastIPAddressInformation unicastAddress in ipInterface.UnicastAddresses)
                            {
                                if ((unicastAddress.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) && (unicastAddress.IPv4Mask.ToString() != "0.0.0.0"))
                                {
                                    ip = unicastAddress.Address.ToString();
break;

                                }                          
                            }`enter code here`
                        }


                    }
                }
                return ip;
            }

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