public ActionResult Add()
        {
            Post post = new Post();

            ViewBag.ActionName = "Пост - Добавление";
            ViewBag.Tags = _tagRepository.Tags.ToList();

            return View("Edit", post);
        }
        public void Save(Post post, int[] selectedTags)
        {
            if (post.Id == 0)
            {
                if (selectedTags != null)
                {
                    foreach (var tag in _db.Tags.Where(t => selectedTags.Contains(t.Id)))
                    {
                        post.Tags.Add(tag);
                    }
                }

                post.CreateDate = DateTime.Now;
                _db.Posts.Add(post);
            }
            else
            {
                Post dbEntry = _db.Posts.Find(post.Id);

                if (dbEntry != null)
                {
                    dbEntry.Title = post.Title;
                    dbEntry.IntroText = post.IntroText;
                    dbEntry.MainText = post.MainText;
                    dbEntry.IsPublished = post.IsPublished;

                    if (selectedTags != null)
                    {
                        dbEntry.Tags.Clear();

                        foreach (var tag in _db.Tags.Where(t => selectedTags.Contains(t.Id)))
                        {
                            dbEntry.Tags.Add(tag);
                        }
                    }

                    _db.Entry(dbEntry).State = EntityState.Modified;
                }
            }

            _db.SaveChanges();
        }
        public ActionResult Save(Post post, int[] selectedTags)
        {
            if (ModelState.IsValid)
            {
                _postRepository.Save(post, selectedTags);

                return RedirectToAction("List", "Posts", new { page = TempData["page"], order = TempData["order"], published = TempData["published"] });
            }

            ViewBag.Tags = _tagRepository.Tags.ToList();
            return View(post);
        }