网页捕获出现一个诡异问题

Question

/// <summary>
        /// 提取整个网页内容
        /// </summary>
        /// <param name="Url">被提取的地址</param>
        /// <returns></returns>
        public static String Get(String Url, CookieContainer CC)
        {            String Html = "";
            if (Url.Length < 1)
            {                return "";
            }
            String address = Url;
            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(address);
            req.Method = "GET";
            req.ContentType = "application/x-www-form-urlencoded;charset=gb2312";
            req.Referer = Url;
            //75秒无法获取数据就放弃
           //req.Timeout = 30000;
            req.CookieContainer = CC;
            //接受数据回来            using (HttpWebResponse wr = (HttpWebResponse)req.GetResponse())
            {
                Stream R = wr.GetResponseStream();
                StreamReader SR = new StreamReader(R, System.Text.Encoding.Default);
                Html = SR.ReadToEnd();
                R.Dispose();
                SR.Dispose();
            }
            Url = null;
            address = null;
            CC = null;
            req.Abort ();
            return Html;
        }以上是我的捕捉代码我出现的问题是在一个循环中执行了一次Get然后 判断是否有内容分页的时候
再次执行 Get似乎就不成功了
for(DetailI=0;DetailI<ListUrl.Count;DetailI++)
                    {
                        try
                        {
                        #region 查看是否已经到了地址结尾
                        
                        //lock (locker)
                        //{
                            if (!Stop)
                            {
                                String Html = "";
                                int TempI = 0;
                                Invoke (DWF , new object [] { "打开内容页.当前编号:" + DetailI.ToString() +" 总序列:" + ListUrl.Count.ToString() });                                ////进度条动画
                                //progressBar1.Minimum = DetailI;
                                ProgressBarMaximum PBM = new ProgressBarMaximum (FProgressBarMin);
                                Invoke (PBM , new object [] { DetailI });
                                PBM = null;
                                TempI = DetailI;
                                String Url = ListUrl [DetailI].ToString ();
                                String TempTempUrl = Url;
                                //判断读取路径是否正确!
                                if (TempTempUrl!=""&&TempTempUrl!=null&&TempTempUrl.Substring (0 , 7).ToUpper () != "HTTP://")
                                {
                                    if (Url.Substring (0 , 1) != "/")
                                    {
                                        Url = Model.Url.Substring (0 , Model.Url.LastIndexOf ('/') + 1) + Url;
                                    }
                                    else
                                    {
                                        String HostName = Model.Url.Substring (7 , Model.Url.Length - 7);
                                        HostName = HostName.Substring (0 , HostName.IndexOf ('/'));
                                        Url = "HTTP://" + HostName + Url;
                                    }
                                }
                                Invoke (DWF , new object [] { "正在采集:" + Url });                                if (!IsUTF8.Checked)
                                {
                                    Html = Panda.WebController.Get (Url , null);
                                }
                                else
                                {
                                    Html = Panda.WebController.GetUTF8 (Url , null);
                                }                                //Html = Panda.WebController.Get (Url , null);                                Invoke (DWF , new object [] { "数据整理"});
                                #region 数据整理
                                String Title = Panda.RegController.FirstRegMatch (Model.RegexTitle , Html);
                                Title = Title.Replace("\r\n", "");
                                Title = Title.Trim();
                                Title = Title.Replace(" ", "");
                                Title = Panda.RegController.DelHtml(Title);
                                Title = Panda.RegController.DelScript(Title);
                                Title = Title.Replace("<b>", "");
                                String Detail = Panda.RegController.FirstRegMatch (Model.RegexDetail , Html);
                                Detail = Panda.RegController.DelScript (Detail);                                
                                #region 判断是否有内容页分页正则.如果有就进行分页处理
                                if (Model.BodyPage != null && Model.BodyPage != ""&&Model.RegexBlockPage!=null&&Model.RegexBlockPage!="")
                                {
                                    
                                    String TempPageHtml = "";
                                    TempPageHtml = Panda.RegController.FirstRegMatch (Model.RegexBlockPage,Html);
                                    MatchCollection MCPage = Panda.RegController.RegMatch (Model.BodyPage , TempPageHtml);
                                    Invoke (DWF , new object [] { "包含分页:" + (MCPage.Count+1).ToString() });
                                    if (MCPage.Count > 0)
                                    {                                        String PageHtml = "";
                                        for (int MCPageI = 0 ; MCPageI < MCPage.Count ;MCPageI++)
                                        {
                                            String PageUrl = MCPage [MCPageI].Value;                                            //判断读取路径是否正确!
                                            if (PageUrl.Substring (0 , 7).ToUpper () != "HTTP://")
                                            {
                                                if (PageUrl.Substring (0 , 1) != "/")
                                                {
                                                    PageUrl = Model.Url.Substring (0 , Model.Url.LastIndexOf ('/') + 1) + PageUrl;
                                                }
                                                else
                                                {
                                                    String HostName = Model.Url.Substring (7 , Model.Url.Length - 7);
                                                    HostName = HostName.Substring (0 , HostName.IndexOf ('/'));
                                                    PageUrl = "HTTP://" + HostName + PageUrl;
                                                }
                                            }
                                            //if (!IsUTF8.Checked)
                                            //{
                                            PageHtml = Panda.WebController.Get (PageUrl , null);
                                            MessageBox.Show (PageHtml);
                                            PageHtml = Panda.RegController.FirstRegMatch (Model.RegexDetail , PageHtml);
                                            Detail += PageHtml;
                                            //}
                                            //else
                                            //{
                                            //    PageHtml = Panda.WebController.GetUTF8 (Url , null);
                                            //    PageHtml = Panda.RegController.FirstRegMatch (Model.RegexDetail , PageHtml);
                                            //    Detail += PageHtml;
                                            //}
                                        }
                                    }
                                }这个是到循环的内容...
MessageBox到 //}的内容并不会执行
而且PageHtml并没有捕捉到任何内容...

Answer 1

没有报错...但是是直接跳过了..我很郁闷..不知道为什么...