DDD领域模型AutoMapper实现DTO（七）

DTO的应用场景：

定义产品类：

 public class Product
    {
        public string ProductName { get; set; }
        public decimal ProductUnitPrice { get; set; }
    }

NueGet 添加AutoMapper映射组件。

定义ProductDTO对象：

 public class ProductDTO
    {
        public string ProductName { get; set; }
        public decimal ProductUnitPrice { get; set; }
    }

定义两个类：

 public class Address
    {
        public string AddressState { get; set; }
        public string AddressCity { get; set; }
        public string AddressStreet { get; set; }
    }
public class Customer
    {
        public string CustomerName { get; set; }
        public string CustomerMobile { get; set; }
        public Address CustomerAddress { get; set; }
    }

多个对象的映射类：

  public class CustomerDTO
    {
        public string Name { get; set; }
        public string Mobile { get; set; }
        public string State { get; set; }
        public string City { get; set; }
        public string Street { get; set; }
    }

映射的代码：

  public class  Mapping
    {
        public static ProductDTO CreateProductMapping()
        {
           var map=Mapper.CreateMap<Product, ProductDTO>();
           Product p = new Product
            {
                ProductName = "P1",
                ProductUnitPrice = 100
            };

            var pdto = Mapper.Map<Product, ProductDTO>(p);
            return pdto;

        }

        public static CustomerDTO CreateCustomerMapping()
        {
            //创建映射关系
            var map = Mapper.CreateMap<Customer, CustomerDTO>();
            map.ForMember(ppt => ppt.Name, p => p.MapFrom(s => s.CustomerName));
            map.ForMember(ppt => ppt.Mobile, p => p.MapFrom(s => s.CustomerMobile));
            map.ForMember(ppt => ppt.State, p => p.MapFrom(s => s.CustomerAddress.AddressState));
            map.ForMember(ppt => ppt.City, p => p.MapFrom(s => s.CustomerAddress.AddressCity));
            map.ForMember(ppt => ppt.Street, p => p.MapFrom(s => s.CustomerAddress.AddressStreet));

            Customer customer = new Customer
            {
                CustomerName = "sun",
                CustomerMobile = "135933",
                CustomerAddress =
                      new Address
                      {
                          AddressState = "山西",
                          AddressCity = "孝义",
                          AddressStreet = "三贤路"
                      }
            };
            var customerdto = Mapper.Map<Customer, CustomerDTO>(customer);
            return customerdto;
        }
        //简单
        public static CustomerDTO CreateCustomerMapppingNew()
        {
            var map = Mapper.CreateMap<Customer, CustomerDTO>();
            map.ConstructProjectionUsing(s => new CustomerDTO
            {
                Name = s.CustomerName,
                Mobile = s.CustomerMobile,
                State = s.CustomerAddress.AddressState,
                City = s.CustomerAddress.AddressCity,
                Street = s.CustomerAddress.AddressStreet
            });
            Customer customer = new Customer
            {
                CustomerName = "sun",
                CustomerMobile = "13458629365",
                CustomerAddress =
                      new Address
                      {
                          AddressState = "山西",
                          AddressCity = "孝义",
                          AddressStreet = "三贤路"
                      }
            };
            var customerdto = Mapper.Map<Customer, CustomerDTO>(customer);
            return customerdto;
        }

    }

在上下文接口中（IRepositoryContext）中定义DTO的支持:

  //添加DTO对象
        void RegisterCreateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
           where TAggreateRoot :
           class, IAggreateRoot;

        void RegisterUpdate<TAggreateRoot>(TAggreateRoot aggreateroot) where TAggreateRoot :
            class, IAggreateRoot;
        void RegisterUpdateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto) where TAggreateRoot :
   class, IAggreateRoot;

仓储接口的调整：

 void Create<TDTO>(TDTO tdto);

  TDTO GetByID<TDTO>(Guid id);

  List<TDTO> GetByCondition<TDTO>(Expression<Func<TAggreateRoot, bool>> condition);

   void Update<TDTO>(TDTO tdto);    

  void Remove<TDTO>(TDTO tdto);

上下文DTO定义：（让EF上下文实现）

  public abstract void RegisterCreateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
        where TAggreateRoot : class, IAggreateRoot;

 public abstract void RegisterUpdateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
   where TAggreateRoot : class, IAggreateRoot; 

  public abstract void RegisterRemoveDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
   where TAggreateRoot : class, IAggreateRoot;

EF上下文中实现：

  public override void RegisterCreateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
        {

                if (processdto != null)
                    processdto(tdto);
                var aggreateroot = Mapper.Map<TDTO, TAggreateRoot>(tdto);
                RegisterCreate(aggreateroot);

        }

  public override void RegisterUpdateDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
        {
            if (processdto != null)
                processdto(tdto);
            var aggreateroot = Mapper.Map<TDTO, TAggreateRoot>(tdto);
            RegisterUpdate(aggreateroot);
        }

        public override void RegisterRemoveDTO<TDTO, TAggreateRoot>(TDTO tdto, Action<TDTO> processdto)
        {
            if (processdto != null)
                processdto(tdto);
            var aggreateroot = Mapper.Map<TDTO, TAggreateRoot>(tdto);
            RegisterUpdate(aggreateroot);
        }

EFRepository EF 仓储中的实现：

 public void Create<TDTO>(TDTO tdto)
        {
            base.RegisterCreateDTO<TDTO, TAggreateRoot>(tdto, null);
        }

  public List<TDTO> GetByCondition<TDTO>(Expression<Func<TAggreateRoot, bool>> condition)
        {
            //找到聚合根
            var aggreatroots = orderdbcontext.Set<TAggreateRoot>().Where(condition).ToList();
            //转黄成TDTO列表
            var tdtos = new List<TDTO>();
            if (aggreatroots.Count > 0)
            {
                foreach (var aggreateroot in aggreatroots)
                {
                    var tdto = Mapper.Map<TAggreateRoot, TDTO>(aggreateroot);
                    tdtos.Add(tdto);
                }
            }
            return tdtos;
        }

 public TDTO GetByID<TDTO>(Guid id)
        {
            //得到聚合根
            var aggreateroot = orderdbcontext.Set<TAggreateRoot>().Where(p => p.Id == id).SingleOrDefault();
            //进行类型转换
            var tdto = Mapper.Map<TAggreateRoot, TDTO>(aggreateroot);
            //返回对象
            return tdto;
        }

   public void Remove<TDTO>(TDTO dto)
        {
            RegisterRemoveDTO<TDTO, TAggreateRoot>(dto, null);
        }

  public void Update<TDTO>(TDTO dto)
        {
            RegisterUpdateDTO<TDTO, TAggreateRoot>(dto, null);
        }

定义产品DTO类：

  public class ProductDTO
    {
        public Guid Id { get; set; }
        public string Name { get; set; }
        public string Color { get; set; }
        public string Size { get; set; }
        public int Amount { get; set; }
        public decimal UnitPrice { get; set; }
        public string PCategoryName { get; set; }
        public string PDescription { get; set; }
    }

在ProductCategory中实现构造函数：

  public ProductCategory()
        { }

在Product中实现DTO：

    public Product(IRepository<Product> irepository)
        {
            this.irepository = irepository;
            //完成映射的创建
            ProductMapping();
        }

        //在调用构造函数的时候完成映射的创建
        private void ProductMapping()
        {
            //从界面的DTO持久化领域对象
            var mapin = Mapper.CreateMap<ProductDTO, Product>();
            //指定属性的对应关系
            mapin.ConstructProjectionUsing(p => new Product
            {
                ProductName = p.Name,
                Size = p.Size,
                Color = p.Color,
                Count = p.Amount,
                UnitPrice = p.UnitPrice,
                ProductCategory = new ProductCategory
                {
                    Id = Guid.NewGuid(),
                    CategoryName = p.PCategoryName,
                    Description = p.PDescription
                }
            });
            //返回界面的东西
            var mapout = Mapper.CreateMap<Product, ProductDTO>();
            mapout.ConstructProjectionUsing(p => new ProductDTO
            {
                Name = p.ProductName,
                Size = p.Size,
                Color = p.Color,
                UnitPrice = p.UnitPrice,
                PCategoryName = p.ProductCategory.CategoryName,
                PDescription = p.ProductCategory.Description,
                Amount = p.Count
            });
        }

得到产品DTO 的方法：

 /// <summary>
        /// 得到产品DTO
        /// </summary>
        /// <param name="productname"></param>
        /// <returns></returns>
        public Product GetProducyByName(string productname)
        {
            return irepository.GetByCondition(p => p.ProductName == productname)
                .FirstOrDefault();
        }

通过DTO 创建Product：

     /// <summary>
            /// 通过DTOCreate
            /// </summary>
            /// <param name="productdto"></param>
        public void CreateProduct(ProductDTO productdto)
        {
            productdto.Id = Guid.NewGuid();
            irepository.Create(productdto);
        }

服务 DTO 的创建：

 /// <summary>
            /// 服务DTO的创建
            /// </summary>
            /// <param name="productdto"></param>
        public void Createproduct(ProductDTO productdto)
        {
            product.CreateProduct(productdto);
            context.Commit();
        }
 /// <summary>
        /// DTO的查询
        /// </summary>
        /// <param name="productname"></param>
        /// <returns></returns>
        public ProductDTO GetProductDTOByName(string productname)
        {
            return product.GetProductDTOByName(productname);
        }

通过DTO创建测试：

  [TestMethod]
        public void CreateProduct()
        {
            //Product product = new Product(new ProductRepository());
            ProductAppService product = new ProductAppService();
            //product.CreateProduct("P1", "Red", "Small", 100, 55, "C1", "T恤类产品");
            //product.CreateProduct("P2", "Green", "Big", 200, 40, "C2", "运动类产品");
            ProductDTO productdto = new ProductDTO();
            productdto.Name = "P3";
            productdto.Color = "Blue";
            productdto.Size = "Middle";
            productdto.Amount = 5000;
            productdto.UnitPrice = 10;
            productdto.PCategoryName = "C3";
            productdto.PDescription = "正装";
            product.Createproduct(productdto);
            context.Commit();
            Assert.IsNotNull(product.GetProductByName("P3"));          

        }

 [TestMethod]
        public void GetproductDTOByName()
        {
            ProductAppService productappservice =
                new ProductAppService();
            var productdto = productappservice.GetProductDTOByName("P3");
            Assert.AreEqual("P3", productdto.Name);
            Assert.AreEqual("C3", productdto.PCategoryName);
        }