public interface IProductRepository : IExtensionRepository<Product>
    {
        /// <summary>
        /// 獲取產(chan)品(pin)列表(biao)
        /// </summary>
        /// <returns></returns>
        IQueryable<Product> GetProduct();

        /// <summary>
        /// 建立產品
        /// </summary>
        void AddProduct(Product entity);

        /// <summary>
        /// 修改(gai)產品
        /// </summary>
        void ModifyProduct(System.Linq.Expressions.Expression<Action<Product>> entity);
    }

　　/// <summary>
    /// 通過用戶信息得(de)到他的訂單列表
    /// </summary>
    public class ProductSpecification : Specification<Product>
    {
        string _productName = default(string);
        public ProductSpecification(string productName)
        {
            _productName = productName;
        }
        public override Expression<Func<Product, bool>> SatisfiedBy()
        {
            Specification<Product> spec = new TrueSpecification<Product>();
            if (string.IsNullOrWhiteSpace(_productName))
                spec &= new DirectSpecification<Product>(o => o.ProductName.Contains(_productName));
            return spec.SatisfiedBy();
        }
    }

　　[DataContract]
    public class ProductDTO
    {
        [DataMember]
        [DisplayName("商(shang)品ID")]
        public int ProductID { get; set; }
        [DataMember]
        [DisplayName("商品名(ming)稱")]
        public string ProductName { get; set; }
        [DataMember]
        [DisplayName("建立日期(qi)")]
        public System.DateTime CreateDate { get; set; }
        [DataMember]
        public int SaleCount { get; set; }
        [DataMember]
        public Nullable<int> ClickCount { get; set; }
        [DataMember]
        [DisplayName("產品描述")]
        public string Info { get; set; }
        [DataMember]
        public int UserID { get; set; }
        [DataMember]
        [DisplayName("銷售價格(ge)")]
        public decimal SalePrice { get; set; }
        [DataMember]
        [DisplayName("折(zhe)扣")]
        public int Discount { get; set; }
    }

　　public partial class Product
    {
        public Product()
        {
            this.ProductDetail = new HashSet<ProductDetail>();
        }
    
        public int ProductID { get; set; }
        public string ProductName { get; set; }
        public System.DateTime CreateDate { get; set; }
        public int SaleCount { get; set; }
        public Nullable<int> ClickCount { get; set; }
        public string Info { get; set; }
        public int UserID { get; set; }
        public decimal SalePrice { get; set; }
        public int Discount { get; set; }
        public System.DateTime UpdateDate { get; set; }
    
        public virtual User_Info User_Info { get; set; }
        public virtual ICollection<ProductDetail> ProductDetail { get; set; }
    }