asp.net - 如何使用 asp.net 获取网络 IP 地址（Internet）？

Question

我正在开发asp.net网站，现在我的问题是如何使用c#代码获取局域网连接的IP地址，例如打开http://whatismyipaddress.com/显示IP信息：183.82.77.56这样我必须得到IP地址，现在我是这样写的

//Get Lan Connected IP address method
        public string GetLanIPAddress()
        {
            //Get the Host Name
            string stringHostName = Dns.GetHostName();
            //Get The Ip Host Entry
            IPAddress[] arrIpAddress1 = Dns.GetHostAddresses(stringHostName);

            IPHostEntry ipHostEntries = Dns.GetHostEntry(stringHostName);
            //Get The Ip Address From The Ip Host Entry Address List
            IPAddress[] arrIpAddress = ipHostEntries.AddressList;
            return arrIpAddress[arrIpAddress.Length - 1].ToString();
        }
        //Get Visitor IP address method
        public string GetVisitorIpAddress()
        {
            string stringIpAddress;
            stringIpAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (stringIpAddress == null) //may be the HTTP_X_FORWARDED_FOR is null
            {
                stringIpAddress = Request.ServerVariables["REMOTE_ADDR"];//we can use REMOTE_ADDR
                string add = HttpContext.Current.Request.UserHostAddress;
            }
            return "Your ip is " + stringIpAddress;
        }

但是输出错误，请帮助我。

谢谢你

Answer 1

添加此代码

        foreach (IPAddress ipaddress in ipHostEntries.AddressList)
        {
            IPStr = ipaddress.ToString();
            return IPStr;
        }
        return IPStr;

试试这个网关地址将是你需要的

   IPGlobalProperties ipProperties = IPGlobalProperties.GetIPGlobalProperties();
        Console.WriteLine(ipProperties.HostName);

        foreach (NetworkInterface networkCard in NetworkInterface.GetAllNetworkInterfaces())
        {
            foreach (GatewayIPAddressInformation gatewayAddr in networkCard.GetIPProperties().GatewayAddresses)
            {
                Console.WriteLine("Information: ");
                Console.WriteLine("Interface type: {0}", networkCard.NetworkInterfaceType.ToString());
                Console.WriteLine("Name: {0}", networkCard.Name);
                Console.WriteLine("Id: {0}", networkCard.Id);
                Console.WriteLine("Description: {0}", networkCard.Description);
                Console.WriteLine("Gateway address: {0}", gatewayAddr.Address.ToString());
                Console.WriteLine("IP: {0}", System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName()).AddressList[0].ToString());
                Console.WriteLine("Speed: {0}", networkCard.Speed);
                Console.WriteLine("MAC: {0}", networkCard.GetPhysicalAddress().ToString());
            }
        }