public ActionResult DeleteNews(News newsToDelete)
 {
     libRepo.NewsRepo.Remove(newsToDelete);
         libRepo.Save();
         TempData["SuccessNoti"] = "Delete news successfully.";
         UpdateLatestNews();
         return RedirectToAction("Index");
 }
 public ActionResult AddNews(News newsToAdd)
 {
     if (ModelState.IsValid)
     {
         newsToAdd.PostTime = DateTime.Now;
         libRepo.NewsRepo.Add(newsToAdd);
         libRepo.Save();
         TempData["SuccessNoti"] = "Add news successfully.";
         UpdateLatestNews();
         return RedirectToAction("Index");
     }
     return View(newsToAdd);
 }
 public ActionResult EditNews(News newsToEdit)
 {
     if (ModelState.IsValid)
     {
         libRepo.NewsRepo.Update(newsToEdit);
         libRepo.Save();
         TempData["SuccessNoti"] = "Edit news successfully.";
         UpdateLatestNews();
         return RedirectToAction("Index");
     }
     return View(newsToEdit);
 }