#region 获取网页源码 (返回String)    /// 
    /// 获取网页源码 (返回String)    /// 
    ///     /// 
         public static string GetHtmlCode(string url)    {        try        {            string htmlCode;            HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);            webRequest.Referer = null;//最好写请求地址的域名            webRequest.Timeout = 30000;            webRequest.Method = "GET";            webRequest.UserAgent = "Mozilla/4.0";            webRequest.Headers.Add("Accept-Encoding", "gzip, deflate");            HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();            if (webResponse.ContentEncoding.ToLower() == "gzip")//如果使用了GZip则先解压            {                using (System.IO.Stream streamReceive = webResponse.GetResponseStream())                {                    using (var zipStream =                        new System.IO.Compression.GZipStream(streamReceive, System.IO.Compression.CompressionMode.Decompress))                    {                        using (StreamReader sr = new System.IO.StreamReader(zipStream, Encoding.UTF8))                        {                            htmlCode = sr.ReadToEnd();                        }                    }                }            }            else            {                using (System.IO.Stream streamReceive = webResponse.GetResponseStream())                {                    using (System.IO.StreamReader sr = new System.IO.StreamReader(streamReceive, Encoding.UTF8))                    {                        htmlCode = sr.ReadToEnd();                    }                }            }            return htmlCode;        }        catch        {            return string.Empty;        }    }    #endregion