最有效的方法來編寫AutoMapper代碼？

我最近給Automapper一個鏡頭，一旦我得到它的工作，它絕對是太棒了。問題是，我必須編寫的實際代碼來設置Automapper是非常糟糕的，我想知道我正在做這件事的方式是否可以改進或簡化。我正在使用它（在以下示例中）將我的實體轉換爲視圖模型。字段名稱是完全不同的，所以我必須在Global.asax手動創建的映射（據我所知）最有效的方法來編寫AutoMapper代碼？

public static class AutoMapperConfig 
{ 
    public static void RegisterMappings() 
    { 
     Mapper.Initialize(cfg => 
     { 
      cfg.CreateMap<customer_master, CustomerViewModel>() 
      .ForMember 
       (dst => dst.FirstName, src => src.MapFrom(e => e.cm_firstname)) 
      .ForMember 
       (dst => dst.LastName, src => src.MapFrom(e => e.cm_lastname)) 
      .ForMember 
       (dst => dst.Id, src => src.MapFrom(e => e.cm_id)) 
      .ForMember 
       (dst => dst.Address1, src => src.MapFrom(e => e.cm_address1)) 
      .ForMember 
       (dst => dst.Address2, src => src.MapFrom(e => e.cm_address2)) 
      .ForMember 
       (dst => dst.City, src => src.MapFrom(e => e.cm_city)) 
      .ForMember 
       (dst => dst.State, src => src.MapFrom(e => e.cm_state)) 
      .ForMember 
       (dst => dst.Zip, src => src.MapFrom(e => e.cm_zip)) 
      .ForMember 
       (dst => dst.Country, src => src.MapFrom(e => e.cm_country)) 
      .ForMember 
       (dst => dst.Email, src => src.MapFrom(e => e.cm_email)) 
      .ForMember 
       (dst => dst.Phone, src => src.MapFrom(e => e.cm_phone)) 
      .ForMember 
       (dst => dst.Fax, src => src.MapFrom(e => e.cm_fax)) 
      .ForMember 
       (dst => dst.Active, src => src.MapFrom(e => e.cm_active)) 
      .ForMember 
       (dst => dst.Company, src => src.MapFrom(e => e.cm_company)); 

      cfg.CreateMap<CustomerViewModel, customer_master>() 
      .ForMember 
       (dst => dst.cm_firstname, src => src.MapFrom(e => e.FirstName)) 
      .ForMember 
       (dst => dst.cm_lastname, src => src.MapFrom(e => e.LastName)) 
      .ForMember 
       (dst => dst.cm_id, src => src.MapFrom(e => e.Id)) 
      .ForMember 
       (dst => dst.cm_address1, src => src.MapFrom(e => e.Address1)) 
      .ForMember 
       (dst => dst.cm_address2, src => src.MapFrom(e => e.Address2)) 
      .ForMember 
       (dst => dst.cm_city, src => src.MapFrom(e => e.City)) 
      .ForMember 
       (dst => dst.cm_state, src => src.MapFrom(e => e.State)) 
      .ForMember 
       (dst => dst.cm_zip, src => src.MapFrom(e => e.Zip)) 
      .ForMember 
       (dst => dst.cm_country, src => src.MapFrom(e => e.Country)) 
      .ForMember 
       (dst => dst.cm_email, src => src.MapFrom(e => e.Email)) 
      .ForMember 
       (dst => dst.cm_phone, src => src.MapFrom(e => e.Phone)) 
      .ForMember 
       (dst => dst.cm_fax, src => src.MapFrom(e => e.Fax)) 
      .ForMember 
       (dst => dst.cm_active, src => src.MapFrom(e => e.Active)) 
      .ForMember 
       (dst => dst.cm_company, src => src.MapFrom(e => e.Company)); 

     }); 
    } 
}

然後：

AutoMapperConfig.RegisterMappings();

晴我的問題是：

做場名稱必須像這樣明確地映射，因爲名稱是如此不同？
有沒有辦法只寫第一個地圖，然後將其用於第二呢？實體 - > ViewModel與ViewModel - > Entity相同，這樣寫兩次似乎是多餘的。我想我在這裏尋找某種雙向選項。

來源

2017-04-14 Halter

似乎所有轉換遵循相同的模式：成員X地圖到成員cm_X。如果是這樣的話，您可以簡化您的代碼如下：

Mapper.Initialize(cfg => {  
    // will remove "cm_" from destination when matching   
    // the fact you have different casing (Address vs cm_address) 
    // is fine and is already handled 
    cfg.RecognizeDestinationPrefixes(new [] {"cm_"}); 
    // will remove "cm_" from source when mapping 
    cfg.RecognizePrefixes(new[] { "cm_" }); 
    // will map in both directions 
    cfg.CreateMap<Entity, Dto>().ReverseMap();     
});

來源

2017-04-14 13:47:07 Evk

感謝這個，我的實體設計不** ** EXACLTY遵循此基礎上，表名「CM_」的變化，有可能是在屬性名（「FIRST_NAME」來說吧）下劃線，但這是向正確的方向 – Halter

了巨大的一步，應該是沒有問題的，因爲你可以添加很多的前綴（這是字符串數組）。下劃線也可以處理。 – Evk

如果字段名稱具有明確的模式，例如您的示例中的cm_，則可以查看定義約定。見https://github.com/AutoMapper/AutoMapper/wiki/Conventions。也許這會照顧他們的大部分？

來源

2017-04-14 13:21:56

如果字段名稱是不同的，你必須這樣做，併爲雙向你可以只寫一個映射，並在末尾添加：

.ReverseMap()

來源

2017-04-14 13:23:03

最有效的方法來編寫AutoMapper代碼？

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