public ActionResult EditFilmScreening(Filmscreenings screenings)
 {
     if (ModelState.IsValid)
     {
         screenings.Activities.typeActivity = 1;
         screenings.Activities.id           = screenings.activityId;
         try {
             activitiesRepo.ModifyActivity(screenings);
             return(RedirectToAction("Index"));
         }
         catch
         {
             return(HttpNotFound());
         }
     }
     ViewBag.IsEditing = true;
     FillFilmscreeninsDropdownsWithSecection(screenings.roomId, screenings.filmId);
     return(View(screenings));
 }