获取本机外网ip和内网ip

　　获取本机外网ip

  //获取本机的公网IP
        public static string GetIP()
        {
            string tempip = "";
            try
            {
                WebRequest request = WebRequest.Create("http://ip.qq.com/");
                request.Timeout = 10000;
                WebResponse response = request.GetResponse();
                Stream resStream = response.GetResponseStream();
                StreamReader sr = new StreamReader(resStream, System.Text.Encoding.Default);
                string htmlinfo = sr.ReadToEnd();
                //匹配IP的正则表达式
                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);
                Match mc = r.Match(htmlinfo);
                //获取匹配到的IP
                tempip = mc.Groups[0].Value;

                resStream.Close();
                sr.Close();
            }
            catch (Exception err)
            {
                tempip = err.Message;
            }
            return tempip;
        }

 

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;
        }