通过IP得到IP所在地省市并获取网页源码

  /// <summary>           
    /// 得到真实IP以及所在地详细信息（Porschev）         
    /// </summary>         
    /// <returns></returns>           
    public string GetIpDetails()
    {
        //设置获取IP地址和国家源码的网址             
        string url = "http://www.ip138.com/ips8.asp";
        string regStr = "(?<=<td\\s*align=\\\"center\\\">)[^<]*?(?=<br/><br/></td>)";

        //IP正则  
        string ipRegStr = "((2[0-4]\\d|25[0-5]|[01]?\\d\\d?)\\.){3}(2[0-4]\\d|25[0-5]|[01]?\\d\\d?)";

        //IP地址                   
        string ip = string.Empty;

        //国家              
        string country = string.Empty;

        //省市               
        string adr = string.Empty;

        //得到网页源码               
        string html = GetHtml(url);
        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);

        //得到IP    
        ip = ma.Value;
        int index = html.LastIndexOf("：") + 1;

        //得到国家  
        country = html.Substring(index);
        adr = GetAdrByIp(ip);
        return "IP：" + ip + "  国家：" + country + "  省市：" + adr;
    }


    /// <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.ip138.com/ips1388.asp";//?ip=" + ip;
        //string regStr = "(?<=<span\\s*id=\\\"cz_addr\\\">).*?(?=</span>)";
        string regStr = "(?<=<td\\s*align=\\\"center\\\">)[^<]*?(?=<br/><br/></td>)";
        //得到网页源码  
        string html = GetHtml(url);
        Regex reg = new Regex(regStr, RegexOptions.None);
        Match ma = reg.Match(html);
        html = ma.Value;
        string[] arr = html.Split(' ');
        return arr[1];
    }
    /// <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)
    {
        string str = "";
        try
        {
            Uri uri = new Uri(url);
            WebRequest wr = WebRequest.Create(uri);
            Stream s = wr.GetResponse().GetResponseStream();
            StreamReader sr = new StreamReader(s, Encoding.Default);
            str = sr.ReadToEnd();
         
        }
        catch (Exception e)
        {
        }
        return str; 
    }