public ActionResult Create(TagModel model, bool continueEditing)
        {
            if (ModelState.IsValid)
            {
                var tag = model.ToEntity();
                _articleService.InsertTag(tag);

                SuccessNotification("添加成功");

                return continueEditing ? RedirectToAction("Edit", new { id = tag.Id }) : RedirectToAction("List");
            }
            return View(model);
        }
        public ActionResult Edit(TagModel model, bool continueEditing)
        {
            var tag = _articleService.GetTagById(model.Id);

            if (ModelState.IsValid)
            {
                tag = model.ToEntity(tag);
                _articleService.UpdateTag(tag);

                SuccessNotification("保存成功");
                return continueEditing ? RedirectToAction("Edit", new { id = tag.Id }) : RedirectToAction("List");
            }
            return View(model);
        }