Question

我试图在我的网站上使用此代码获取本地IP地址：

string ip  = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

方案是我尝试从2个不同的IP地址呼叫网站，第一个呼叫已经成功，但第二个仍然显示第一个IP地址。

但如果我使用CTRL + SHIFT + R打开网页，那么两个IP地址都是正确的。

不知何故，字符串ip = System.Web.HttpContext.Current.Request.ServerVariables [＆＃34; REMOTE_ADDR＆＃34;];没有刷新并执行以前调用的缓存。

我如何解决这个问题？

下面是几个获取本地IP地址的代码，但它没有工作，它只能获取服务器ip（IIS IP）而不是本地ip

//code no 1
        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("No network adapters with an IPv4 address in the system!");
    }


//code no : 2
        public static string[] GetAllLocalIPv4(NetworkInterfaceType _type)
    {
        List<string> ipAddrList = new List<string>();
        foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces())
        {
            if (item.NetworkInterfaceType == _type && item.OperationalStatus == OperationalStatus.Up)
            {
                foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses)
                {
                    if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
                    {
                        ipAddrList.Add(ip.Address.ToString());
                    }
                }
            }
        }
        return ipAddrList.ToArray();
    }

//code no 3

    public string GetLocalIpAddress2()
    {
        UnicastIPAddressInformation mostSuitableIp = null;

        var networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();

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

            var properties = network.GetIPProperties();

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

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

                if (IPAddress.IsLoopback(address.Address))
                    continue;

                if (!address.IsDnsEligible)
                {
                    if (mostSuitableIp == null)
                        mostSuitableIp = address;
                    continue;
                }

                // The best IP is the IP got from DHCP server
                if (address.PrefixOrigin != PrefixOrigin.Dhcp)
                {
                    if (mostSuitableIp == null || !mostSuitableIp.IsDnsEligible)
                        mostSuitableIp = address;
                    continue;
                }

                return address.Address.ToString();
            }
        }

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

//code no 4
        public  string GetIP4Address()
        {
            string IP4Address = String.Empty;

            foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
            {
                if (IPA.AddressFamily == AddressFamily.InterNetwork)
                {
                    IP4Address = IPA.ToString();
                    break;
                }
            }


            return IP4Address;
        }

谢谢，萨姆

使用REMOTE_ADDR获取本地IP

0 个答案: