得到真实外网IP、IP所在国家、省份、地区

 #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