public ActionResult Store(string categoryId = "")
        {
            ViewBag.Message     = "Your contact page.";
            ViewBag.CateList    = _categoryProductRepository.GetAll();
            ViewBag.lstCatePost = _postRepository.GetPost_Category();
            IList <Product> products = null;

            if (string.IsNullOrEmpty(categoryId))
            {
                ViewBag.CategoryName = "Tất cả sản phẩm";
                products             = _productRepository.GetAll();
            }
            else
            {
                products = _productRepository.GetByCategory(categoryId);
                var category = _categoryProductRepository.Find(categoryId);
                ViewBag.CategoryName = category.CategoryName;
            }
            return(View(products));
        }