Automapper配置設置

Question

我正在爲我的DAL使用實體框架並希望將實體對象轉換爲業務對象，反之亦然。這發生在我的BLL項目中。我希望能夠在我的BLL項目中設置automapper ... let say CustomerFs auto由EF生成並將其轉換爲CustomerWithDifferentDetail.cs（我的業務對象）

我試圖在BLL下創建一個AutoMapperBLLConfig.cs項目用下面的代碼：

public static void Configure() 
    { 
     Mapper.Initialize(cfg => 
     { 
      cfg.AddProfile(new CustomerProfile()); 
     }); 
    } 


public class CustomerProfile : Profile 
{ 
    protected override void Configure() 
    { 
     var config = new MapperConfiguration(cfg => 
     { 
      cfg.CreateMap<Customer, CustomerWithDifferentDetail>(); 
      cfg.CreateMap<CustomerWithDifferentDetail, Customer>(); 
     }); 
    } 
} 

然後創建下用下面的代碼BLL項目CustermerService.cs來測試它的工作：

public void CustomerToCustomerWithDifferentDetail() 
{ 
    AutoMapperBLLConfiguration.Configure(); 
    Customer source = new Customer 
     { 
      Account = 1234, 
      Purchase_Quantity = 100, 
      Date = "05/05/2016", 
      Total = 500 
     }; 

    Models.CustomerWithDifferentDetail testCustomerDTO = Mapper.Map<Customer, Models.CustomerWithDifferentDetail>(source) 
} 

我得到這個錯誤： 缺少類型映射配置或不支持的映射。

我不知道我做錯了什麼。我沒有start_up或global.aspx。這是一個班級圖書館。我不確定我錯過了什麼或者錯了什麼。

我有一個單獨的項目調用保存所有業務對象，包括CustomerWithDifferentDetail.cs的模型。在這種情況下，CustomerWithDifferentDetail只有兩個屬性：Account和Total。如果映射，它應該給我帳戶= 1234和總數= 500 - 基本上與實體對象相同的數據只是在不同的形狀。

=======================更新====================== =========== AutoMapperBLLConfig.cs - 留在上面一樣

CustomerProfile.cs指出

public class CustomerProfile : Profile 
{ 
    protected override void Configure() 
    { 
     var config = new MapperConfiguration(cfg => 
     { 
      cfg.CreateMap<Customer, CustomerWithDifferentDetail>().ReverseMap(); //cut it down to one line with ReverseMap 
     }); 
    } 
    CreateMap<Customer, CustomerWithDifferentDetail>().ReverseMap(); //missed this one line before; hence, the error 
} 

CustomerService.cs

static CustomerService() 
    { 
     AutoMapperBLLConfiguration.Configure(); //per @Erik Philips suggestion, move this call to a static constructor 
    } 

public void CustomerToCustomerWithDifferentDetail() 
{ 
    Customer source = new Customer 
     { 
      Account = 1234, 
      Purchase_Quantity = 100, 
      Date = "05/05/2016", 
      Total = 500 
     }; 

    Models.CustomerWithDifferentDetail testCustomerDTO = Mapper.Map<Customer, Models.CustomerWithDifferentDetail>(source); 
} 

結果：我testCustomerDTO回報正是我所期望的。

Answer 1

由於您使用AutoMapper的實例方法：

var config = new MapperConfiguration(cfg => 
{ 
    cfg.CreateMap<Customer, CustomerWithDifferentDetail>(); 
    cfg.CreateMap<CustomerWithDifferentDetail, Customer>(); 
}); 

然後，你需要使用的實例映射：

Models.CustomerWithDifferentDetail testCustomerDTO = 
    config.Map<Customer, Models.CustomerWithDifferentDetail>(source) 

我個人還沒有真正在想這通過我的應用程序（I need to move to the instance method instead of the static method）。 （Migrating from status API）。

即興，根據你的代碼，我可能會做這樣的事情：

public class PersonDataObject 
{ 
    public string Name { get; set; } 
} 

public class PersonBusinessObject 
{ 
    private readonly MapperConfiguration _mapper; 

    public string Name { get; set; } 

    PersonBusinessObject() 
    { 
    _mapper = new MapperConfiguration(cfg => 
    { 
     cfg.CreateMap<PersonDataObject,PersonBusinessObject>(); 
    }); 
    } 

    public static PersonBusinessObject MapFrom(PersonDataObject data) 
    { 
    return _mapper.Map<PersonBusinessObject>(data); 
    } 
} 

那麼你可以簡單：

PersonDataObject data = new PersonDataObject(); 

PersonBusinessObject business = PersonBusinessObject.MapFrom(data);