protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { List <MovieDTO> ListMovie = new List <MovieDTO>(); List <RoomDTO> ListRoom = new List <RoomDTO>(); List <ScheduleDTO> ListSchedule = new List <ScheduleDTO>(); ListMovie = MovieDaos.GetMovieListForSchedule(); Session.Add("AdminMovieList", ListMovie); ListRoom = RoomDaos.GetRoomListForSchedule(); Session.Add("AdminRoomList", ListRoom); ListSchedule = ScheduleDaos.GetScheduleList(); Session.Add("AdminScheduleList", ListSchedule); MovieIDDropdownListAdd(ListMovie); RoomIDDropdownListAdd(ListRoom); TimeDropdownListAdd(); Clear(); } }