title	author	date	CreateTime	categories
dotnet 获取本机 IP 地址方法	lindexi	2019-09-09 15:56:33 +0800	2019-09-05 14:34:12 +0800	dotnet

本文告诉大家如何在 C# .NET 获取本机 IP 地址

有两个获取方法，第一个方法是通过 DNS 获取

            var host = Dns.GetHostEntry(Dns.GetHostName());
            foreach (var ip in host.AddressList)
            {
            	// 下面的判断过滤 IP v4 地址
                if (ip.AddressFamily == AddressFamily.InterNetwork)
                {
                    Console.WriteLine(ip.ToString());
                }
            }

第二个方法可以过滤指定是 WIFI 的地址还是有限网的地址

            foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces())
            {
                if
                ((
                     item.NetworkInterfaceType == NetworkInterfaceType.Ethernet // 有线网络
                     || item.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 // 无线 wifi 网络
                 )
                    && item.OperationalStatus == OperationalStatus.Up)
                {
                    foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses)
                    {
                        if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
                        {
                            Console.WriteLine(ip.Address.ToString());
                        }
                    }
                }
            }

过滤方法通过 NetworkInterfaceType 判断