public ActionResult GetBrands(int categoryId)
        {
            var brandsOfCategory = productHandler.GetBrandsOfSelectedCategory(categoryId);
            var listOfBrands     = new List <BrandViewModel>();

            foreach (var b in brandsOfCategory)
            {
                listOfBrands.Add(new BrandViewModel
                {
                    BrandId = b.BrandId,
                    Name    = b.Name
                });
            }
            return(Json(listOfBrands, JsonRequestBehavior.AllowGet));
        }