毕业设计排版2

public class NavController : Controller
    {
        private IProductRepository repository;
        public NavController(IProductRepository repo)
        {
            repository = repo;
        }
        public PartialViewResult Menu(string category=null)
        {
            ViewBag.SelectedCategory = category;
            IEnumerable<string> categories = repository.Products
                .Select(x => x.Category)
                .Distinct()
                .OrderBy(x => x);
            return PartialView(categories);
        }

 

public class Product
    {
        [HiddenInput(DisplayValue=false)]
        public int ProductID { get; set; }

        [Required(ErrorMessage="Please enter a product name")]
        public string Name { get; set; }

        [Required (ErrorMessage="Please enter a dscription")]
        [DataType(DataType.MultilineText)]
        public string Description { get; set; }

        [Required]
        [Range(0.01,double.MaxValue,ErrorMessage="Please enter a positive price")]
        public Decimal Price { get; set; }

        [Required(ErrorMessage="Please enter a category")]
        public string Category { get; set; }

        public byte[] ImageData { get; set; }

        [HiddenInput(DisplayValue=false)]
        public string ImageMimeType { get; set; }
    }

public interface IProductRepository
    {
        IQueryable<Product> Products { get; }
        void SaveProduct(Product product);
        void DeleteProduct(Product product);
    }