MVC 使用緩存

public AController()
        {
            ViewBag["Class"] = GetClass(0);
        }


        private List<BlogsClass> GetClass(int parentId)
        {
            List<BlogsClass> list;
            //查詢出分類 尼瑪每次都得查,很煩! 有木有？  考慮緩存


            if (HttpContext.Cache["Class"] == null)
            {
                IClass _Class = new CalssData();
                list = _Class.GetParentClass(parentId);
                HttpContext.Cache.Add("Class", list, new CacheDependency(HttpContext.Server.MapPath("~/web.config")), DateTime.Now.AddDays(1), TimeSpan.Zero, CacheItemPriority.High, null);
                HttpContext.Cache["Class"] = list;
            }
            else
            {
                list = HttpContext.Cache["Class"] as List<BlogsClass>;
            }
            return list;
        }

結果。。。

 

 protected override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            //Add the ActionResult to cache    
            List<BlogsClass> list;
            if (filterContext.HttpContext.Cache["filterContext"] == null)
            {
                IClass _Class = new CalssData();
                list = _Class.GetParentClass(0);
                filterContext.HttpContext.Cache.Add("Class", list,
                 null, DateTime.Now.AddDays(1),
                 System.Web.Caching.Cache.NoSlidingExpiration, CacheItemPriority.High, null);
            }
            else
            {
                list = filterContext.HttpContext.Cache["filterContext"] as List<BlogsClass>;
            }

            //Add a value in order to know the last time it was cached.
            //filterContext.Controller.ViewData["CachedStamp"] = DateTime.Now;

            ViewBag["Class"] = list;
            base.OnActionExecuted(filterContext);
        }

參考：http://www.codeproject.com/Articles/33431/ASP-NET-MVC-Result-Cache