資料採集，微軟控制元件分頁問題的處理

            System.Net.WebClient WebClientObj = new System.Net.WebClient();
                System.Collections.Specialized.NameValueCollection PostVars = new System.Collections.Specialized.NameValueCollection();
                PostVars.Add("__VIEWSTATE", _viewstate);
                PostVars.Add("__EVENTVALIDATION", _eventvalidation);
                PostVars.Add("__EVENTTARGET", "lnkNext");
                PostVars.Add("__EVENTARGUMENT", "");
                PostVars.Add("Toshow", "1");
                PostVars.Add("txtPage", "");
                WebClientObj.Headers.Add("ContentType", "application/x-www-form-urlencoded");
                try
                {
                    byte[] byte1 = WebClientObj.UploadValues(urlStr, "POST", PostVars);
                    string ResponseStr = Encoding.UTF8.GetString(byte1); //得到當前頁面對應的html 文字字串
                    GetPostValue(ResponseStr);//得到當前頁面對應的 __VIEWSTATE 等上面需要的資訊，為抓取下一頁面使用
                    SaveMessage(ResponseStr);//儲存自己內容到資料庫中
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }

       PostVars.Add("__VIEWSTATE", _viewstate);
                PostVars.Add("__EVENTVALIDATION", _eventvalidation);
                PostVars.Add("__EVENTTARGET", "lnkNext");
                PostVars.Add("__EVENTARGUMENT", "");
                PostVars.Add("Toshow", "1");
                PostVars.Add("txtPage", "");

 

注意：用火狐瀏覽器“網路”檢視需要POST的引數.