获取本机外网ip

1   //获取本机的公网IP 2         public static string GetIP() 3         { 4             string tempip = ""; 5             try 6             { 7                 WebRequest request = WebRequest.Create("http://ip.qq.com/"); 8                 request.Timeout = 10000; 9                 WebResponse response = request.GetResponse();10                 Stream resStream = response.GetResponseStream();11                 StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);12                 string htmlinfo = sr.ReadToEnd();13                 //匹配IP的正则表达式14                 Regex r = new Regex("((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|\\d)\\.){3}(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]\\d|[1-9])", RegexOptions.None);15                 Match mc = r.Match(htmlinfo);16                 //获取匹配到的IP17                 tempip = mc.Groups[0].Value;18 19                 resStream.Close();20                 sr.Close();21             }22             catch (Exception err)23             {24                 tempip = err.Message;25             }26             return tempip;27         }

 

获取本机内网ip

//获取内网IP        private string GetInternalIP()        {            IPHostEntry host;            string localIP = "?";            host = Dns.GetHostEntry(Dns.GetHostName());            foreach (IPAddress ip in host.AddressList)            {                if (ip.AddressFamily.ToString() == "InterNetwork")                {                    localIP = ip.ToString();                    break;                }            }            return localIP;        }