得到真实外网IP、IP所在国家、省份、地区

来自：http://blog.csdn.net/porschev/article/details/6335519

 #region##得到真实IP以及所在地详细信息        /// <summary>        /// 得到真实IP以及所在地详细信息（Porschev）        /// </summary>        /// <returns></returns>        public string GetIpDetails()        {                string url = "http://www.ip138.com/ips8.asp";   //设置获取IP地址和国家源码的网址                string regStr = "(?<=<td\\s*align=\\\"center\\\">)[^<]*?(?=<br/><br/></td>)";                  string ipRegStr = "((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)";    //IP正则                        string ip = string.Empty;   //IP地址                string country = string.Empty;  //国家                string adr = string.Empty;   //省市                string html = GetHtml(url);       //得到网页源码                Regex reg = new Regex(regStr, RegexOptions.None);                       Match ma = reg.Match(html);        html = ma.Value;                      Regex ipReg = new Regex(ipRegStr, RegexOptions.None);                ma = ipReg.Match(html);                ip = ma.Value;     //得到IP                int index = html.LastIndexOf("：") + 1;                country = html.Substring(index);                   //得到国家                adr = GetAdrByIp(ip);                return "IP：" + ip + "  国家：" + country + "  省市：" + adr;       }            #endregion       #region##通过IP得到IP所在地省市        /// <summary>        /// 通过IP得到IP所在地省市（Porschev）        /// </summary>        /// <param name="ip"></param>        /// <returns></returns>        public string GetAdrByIp(string ip)        {                string url = "http://www.cz88.net/ip/?ip=" + ip;                string regStr = "(?<=<span\\s*id=\\\"cz_addr\\\">).*?(?=</span>)";                        string html = GetHtml(url);       //得到网页源码                Regex reg = new Regex(regStr, RegexOptions.None);                Match ma = reg.Match(html);                        html = ma.Value;                  string[] arr = html.Split(' ');                return arr[0];        }        #endregion            #region##获取HTML源码信息        /// <summary>        /// 获取HTML源码信息(Porschev)        /// </summary>        /// <param name="url">获取地址</param>        /// <returns>HTML源码</returns>        public string GetHtml(string url)        {                Uri uri = new Uri(url);                WebRequest wr = WebRequest.Create(uri);                Stream s = wr.GetResponse().GetResponseStream();                StreamReader sr = new StreamReader(s, Encoding.Default);                        return sr.ReadToEnd();        }        #endregion