为什么获取IP地址会抛出异常？

Question

背景：我的程序启动后，它必须获取运行所在机器的 IP 地址。

客户端-服务器架构中的 "server" 接收传入的 tcp-ip 消息。

我也要加机器:

有可用的多 IP 地址
是运行Windows2008 R2服务器

获取IP地址的代码如下：

    public bool IsNetworkAvailable
    {
        get
        {
            return System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
        }
    }

    public string thisIP { get; private set; }
    public void GetThisIP()
    {
        if (!string.IsNullOrEmpty(thisIP))
        {
            return;
        }

        thisIP = "*";

        if (IsNetworkAvailable)
        {
            using (System.Net.Sockets.Socket socket = new System.Net.Sockets.Socket(
                System.Net.Sockets.AddressFamily.InterNetwork,
                System.Net.Sockets.SocketType.Dgram, 0))
            {
                socket.Connect("11.0.1.5", 65530);
                System.Net.IPEndPoint endPoint = socket.LocalEndPoint as System.Net.IPEndPoint;
                thisIP = endPoint.Address.ToString();
            }
        }
    }

错误信息如下：

(0x80004005): A socket operation was attempted to an unreachable network 11.0.1.5:65530 
at System.Net.Sockets.Socket.Connect(IPAddress[] addresses, Int32 port)

解决方案：我已将我的代码更改为 rodcesar.santos 中建议的内容： Get local IP address

这是我的（修改后的）代码（并且有效）

            System.Net.NetworkInformation.UnicastIPAddressInformation mostSuitableIp = null;

            var networkInterfaces = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces();

            foreach (var network in networkInterfaces)
            {
                if (network.OperationalStatus != System.Net.NetworkInformation.OperationalStatus.Up)
                {
                    continue;
                }

                var properties = network.GetIPProperties();

                if (properties.GatewayAddresses.Count == 0)
                {
                    continue;
                }

                if (mostSuitableIp != null)
                {
                    break;
                }

                foreach (var address in properties.UnicastAddresses)
                {
                    if (address.Address.AddressFamily != System.Net.Sockets.AddressFamily.InterNetwork)
                    {
                        continue;
                    }

                    if (System.Net.IPAddress.IsLoopback(address.Address))
                    {
                        continue;
                    }

                    if (mostSuitableIp == null && address.IsDnsEligible)
                    {
                        mostSuitableIp = address;
                        break;
                    }
               }
            }

            thisIP = mostSuitableIp != null ? mostSuitableIp.Address.ToString() : "";

Answer 1

阅读接受的答案后@A socket operation was attempted to an unreachable host,

我假设收到此错误的特定客户端计算机的网络有些故障。

引用 @Stephen Cleary

This error indicates that the network was not connected or not configured correctly. It is definitely an error on the client machine, not your server. There isn't much you can do to "solve" the problem. Pretty much all you can do is upgrade the client's network drivers and check for connection problems (maybe they're barely within wireless range, or the Ethernet cable is missing its locking tab).

Answer 2

            System.Net.NetworkInformation.UnicastIPAddressInformation mostSuitableIp = null;

            var networkInterfaces = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces();

            foreach (var network in networkInterfaces)
            {
                if (network.OperationalStatus != System.Net.NetworkInformation.OperationalStatus.Up)
                {
                    continue;
                }

                var properties = network.GetIPProperties();

                if (properties.GatewayAddresses.Count == 0)
                {
                    continue;
                }

                if (mostSuitableIp != null)
                {
                    break;
                }

                foreach (var address in properties.UnicastAddresses)
                {
                    if (address.Address.AddressFamily != System.Net.Sockets.AddressFamily.InterNetwork)
                    {
                        continue;
                    }

                    if (System.Net.IPAddress.IsLoopback(address.Address))
                    {
                        continue;
                    }

                    if (mostSuitableIp == null && address.IsDnsEligible)
                    {
                        mostSuitableIp = address;
                        break;
                    }
               }
            }

            thisIP = mostSuitableIp != null ? mostSuitableIp.Address.ToString() : "";

为什么获取IP地址会抛出异常？

Why does getting an IP address throw an exception?

c#

windows

tcp-ip