public ActionResult Index()
        {
            int page = (Request.QueryString["page"] != null) ? Convert.ToInt32(Request.QueryString["page"]) : 1;
            double pagesize = 5, count = 0;
            int pagesort = (page - 1) * Convert.ToInt32(pagesize);

            count = Convert.ToDouble(catalogd.Get().ToList().Where(a => a.isdel == 0).Count());
            var model = new catalogViewModel()
            {
                Catalog = catalogd.Get().ToList().Where(a => a.isdel == 0).OrderBy(a => a.sort).Skip(pagesort).Take(Convert.ToInt32(pagesize)),
                page = page,
                pages = Convert.ToInt32(Math.Ceiling(count / pagesize))
            };

            return View(model);
        }
        public ActionResult Read(int page = 1)
        {
            if (!CheckMemberlogin)
            {
                return RedirectToAction("login", "admin");
            }
            else
            {
                leftModel();
                var currentpage = page < 1 ? 1 : page;
                var pagesize = 10;
                var cat = catalogd.Get().ToList().Where(a => a.isdel == 0).OrderBy(a => a.sort).OrderByDescending(a=>a.udate).ThenByDescending(a=>a.num);
                var model = new catalogViewModel()
                {
                    Catalog_pagelist = cat.ToPagedList(currentpage, pagesize)

                };

                return View(model);
            }
        }
        public ActionResult Edit(int num)
        {
            if (!CheckMemberlogin)
            {
                return RedirectToAction("login", "admin");
            }
            else
            {
                leftModel();
                var model = new catalogViewModel()
                {
                    Catalog = catalogd.Get().ToList().Where(a => a.isdel == 0 && a.num == num)
                };

                return View(model);
            }
        }