/// <summary>方法一：比较推荐  /// 用HttpWebRequest取得网页源码  /// 对于带BOM的网页很有效，不管是什么编码都能正确识别  /// </summary>  /// <param name="url">网页地址" </param>  /// <returns>返回网页源文件</returns>  public static string GetHtmlSource2(string url)  {      //处理内容      string html = "";      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);      request.Accept = "*/*"; //接受任意文件      request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)"; //       request.AllowAutoRedirect = true;//是否允许302      //request.CookieContainer = new CookieContainer();//cookie容器，      request.Referer = url; //当前页面的引用      HttpWebResponse response = (HttpWebResponse)request.GetResponse();      Stream stream = response.GetResponseStream();      StreamReader reader = new StreamReader(stream, Encoding.Default);      html = reader.ReadToEnd();      stream.Close();      return html;  }

public static string GetHttpData2(string Url)  {      string sException = null;      string sRslt = null;      WebResponse oWebRps = null;      WebRequest oWebRqst = WebRequest.Create(Url);      oWebRqst.Timeout = 50000;      try      {          oWebRps = oWebRqst.GetResponse();      }      catch (WebException e)      {          sException = e.Message.ToString();      }      catch (Exception e)      {          sException = e.ToString();      }      finally      {          if (oWebRps != null)          {              StreamReader oStreamRd = new StreamReader(oWebRps.GetResponseStream(), Encoding.GetEncoding("utf-8"));              sRslt = oStreamRd.ReadToEnd();              oStreamRd.Close();              oWebRps.Close();          }      }      return sRslt;  }