bool responsecontinue = false;
                do
                {
                    try
                    {
                        response = (HttpWebResponse)request.GetResponse();
                        responsecontinue = false;
                    }
                    catch
                    {
                        connectadsl.Adsl(true, true);//重新拨号更换IP，但拨号之后request一直超时，无法再正常获取数据，但IE却能正常打开
                        responsecontinue = true;
                    }
                } while (responsecontinue);