[HttpPost]
        [ValidateInput(false)]
        public ActionResult Add(Title model)
        {
            List<Item> Item = new List<Item>();
            //生成倆選項並且新增
            Item item = new Item();
            item.cItemID = new ObjectId(Guid.NewGuid().ToString().Replace("-", "").Trim().Substring(0, 23));
            item.cItemName = Request["option1"] == null ? "1" : Request["option1"].ToString();

            Item item1 = new Item();
            item1.cItemID = new ObjectId(Guid.NewGuid().ToString().Replace("-", "").Trim().Substring(0, 23));
            item1.cItemName = Request["option2"] == null ? "2" : Request["option2"].ToString();
            Item.Add(item1);
            Item.Add(item);
            //將獲取的List新增到實體的List中
            model.list = Item;
            string errorMsg;
            //插入
            bool result = _dbHelper.Insert<Title>(model, "Title", out errorMsg);
            string str = "/List/Index";
            return Success("儲存成功！", str);
        }

        [HttpGet]
        public ActionResult Edit(string id = "")
        {
            IMongoQuery condition = Query.EQ("_id", new ObjectId(id));
            Title title = new Title();
            title.cTitleId = new ObjectId(id);
            //獲取實體
            title = _dbHelper.FindOne<Title>(condition, "Title");
            return View(title);
        }
        /// <summary>
        /// 儲存詳情頁面
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        [HttpPost]
        [ValidateInput(false)]
        public ActionResult Edit(Title model)
        {

            //方式一：全刪除。在重新插入
            //方式二：修改相應的值  利用下下標

            //IMongoQuery query = Query.EQ("_id", new ObjectId(Request["Id"].ToString()));

            //List<IMongoUpdate> updateList = new List<IMongoUpdate>();

            //updateList.Add(Update.Set("cTitleName", model.cTitleName));
            ////設定list中各項的值。主鍵規律。list.下標.屬性
            //for (int i = 0; i < 2; i++)
            //{
            //    string strCondition = "list." + i + ".cItemName";
            //    string strValue = Request["option" + (i + 1)] == null ? "" : Request["option" + (i + 1)].ToString();
            //    if (!String.Empty.Equals(strValue))
            //    {
            //        updateList.Add(Update.Set(strCondition, strValue));
            //    }
            //}
            ////更新
            //_dbHelper.Update<Title>(query, Update.Combine(updateList.ToArray()), "Title");


            //利用萬用字元$
            IMongoQuery query = Query.EQ("list._id", new ObjectId("0b05d84ea89234ff7be99a4d"));

            List<IMongoUpdate> updateList = new List<IMongoUpdate>();
            string strCondition = "list.$.cItemName";
            string strValue = "12334";
            updateList.Add(Update.Set(strCondition, strValue));


            //更新
            _dbHelper.Update<Title>(query, Update.Combine(updateList.ToArray()), "Title");

            string str = "/List/Index";
            return Success("儲存成功！", str);

        }
        /// <summary>
        /// 刪除
        /// </summary>
        /// <returns></returns>
        public ActionResult Delete(string id)
        {
            //刪除指定的Model
            _dbHelper.Remove<Title>("Title", id);
            string str = "/List/Index";
            return Success("刪除成功！", str);
        }
        /// <summary>
        /// 刪除
        /// </summary>
        /// <returns></returns>
        public ActionResult DelItem(string id, string strTitleId)
        {

            IMongoQuery query = Query.EQ("_id", new ObjectId(id));
            //更新此資源的資訊。刪除list陣列中_id位strTitleId的屬性
            IMongoUpdate updateList = Update.Pull("list", new BsonDocument { { "_id", new ObjectId(strTitleId) } });
            _dbHelper.Update<Title>(query, updateList, "Title");

            string str = "/List/Edit?id=" + id;
            return Success("刪除成功！", str);
        }