public ActionResult AdvanceSearch(FormCollection form)
        {
            SearchModel search = new SearchModel();
            search.Ten = form["TEN"];

            if (form["NHASANXUAT"].ToString() != "0")
                search.NhaSanSuat = form["NHASANXUAT"];
            else
                search.NhaSanSuat = "";

            if (form["LOAISANPHAM"].ToString() != "0")
                search.LoaiSanPham = form["LOAISANPHAM"];
            else
            {
                search.LoaiSanPham = "";
            }

            search.GiaToiThieu = searchcode.TinhGiaToiThieu(form["GiaBan"]);
            search.GiaToiDa = searchcode.TinhGiaToiDa(form["GiaBan"]);

            if (form["KHUYENMAI"] == "false")
                search.KhuyenMai = false;
            else
                search.KhuyenMai = true;

            if (form["BANCHAY"] == "false")
                search.SPBanChay = false;
            else
                search.SPBanChay = true;

            TempData["Advance_search"] = search;
            return RedirectToAction("Index", "Product", new { name = "AdvanceSearch", id = -1 });
        }
        public ProductList SearchAdvance(SearchModel search)
        {
            ProductList list = new ProductList();

            c.BaseAddress = new Uri(url);
            c.DefaultRequestHeaders.Accept.Clear();
            c.DefaultRequestHeaders.Accept.Add(
                new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json")
            );

            HttpResponseMessage response = c.PostAsJsonAsync( "api/product/SearchAdvance",search).Result;
            list = response.Content.ReadAsAsync<ProductList>().Result;

            list.newPageList = list.newList.ToPagedList(1, 20);
           
            return list;
        }