public ActionResult Index(string searchString, int?page)
 {
     if (Session["MaTKAdmin"] == null)
     {
         return(RedirectToAction("Login", "Admin"));
     }
     else
     {
         try
         {
             var model = new QuanLyHangSX()
             {
                 DanhSachHangSanXuat = KhoiTao(searchString, page)
             };
             return(View(model));
         }
         catch (Exception)
         {
             return(View());
         }
     }
 }
        public ActionResult ThemHangSX(QuanLyHangSX qlhang, HttpPostedFileBase file, string submit, int id, string img)
        {
            if (Session["MaTKAdmin"] == null)
            {
                return(RedirectToAction("Login", "Admin"));
            }
            else
            {
                try
                {
                    var model = new QuanLyHangSX()
                    {
                        DanhSachHangSanXuat = KhoiTao("", 1)
                    };
                    ShopEntities shop = new ShopEntities();
                    if (submit == "Thêm")
                    {
                        file = file ?? Request.Files["file"];
                        if (file != null && file.ContentLength > 0)
                        {
                            var fileName = Path.GetFileName(file.FileName);
                            if (fileName != null)
                            {
                                var path = Path.Combine(Server.MapPath("~/Images/HangSXs/"), fileName);
                                file.SaveAs(path);
                            }
                            HangSanXuat hang = new HangSanXuat();

                            hang.TenHang    = qlhang.HangSanXuat.TenHang;
                            hang.LinkWeb    = qlhang.HangSanXuat.LinkWeb;
                            hang.AnhDaiDien = "/Images/HangSXs/" + fileName;
                            shop.HangSanXuats.Add(hang);
                            shop.SaveChanges();
                        }
                    }
                    if (submit == "Sửa")
                    {
                        var hang = shop.HangSanXuats.SingleOrDefault(h => h.MaHang == id);
                        file = file ?? Request.Files["file"];
                        if (file != null && file.ContentLength > 0)
                        {
                            var fileName = Path.GetFileName(file.FileName);
                            if (fileName != null)
                            {
                                var path = Path.Combine(Server.MapPath("~/Images/HangSXs/"), fileName);
                                file.SaveAs(path);

                                hang.TenHang    = qlhang.HangSanXuat.TenHang;
                                hang.LinkWeb    = qlhang.HangSanXuat.LinkWeb;
                                hang.AnhDaiDien = "/Images/HangSXs/" + fileName;
                                shop.SaveChanges();
                            }
                        }
                        else
                        {
                            hang.TenHang    = qlhang.HangSanXuat.TenHang;
                            hang.LinkWeb    = qlhang.HangSanXuat.LinkWeb;
                            hang.AnhDaiDien = img;
                            shop.SaveChanges();
                        }
                    }


                    return(RedirectToAction("Index", model));
                }
                catch (Exception)
                {
                    return(RedirectToAction("Index"));
                }
            }
        }