AutoMapper - 深層次映射

Question

我試圖映射與多層次的成員對象： 這些都是類：

public class Father 
    { 
     public int Id { get; set; } 
     public Son Son { get; set; } 
    } 

    public class FatherModel 
    { 
     public int Id { get; set; } 
     public int SonId { get; set; } 
    } 

    public class Son 
    { 
     public int Id { get; set; } 
    } 

這是我嘗試自動映射它：

AutoMapper.Mapper.CreateMap<FatherModel , Father>() 
         .ForMember(dest => dest.Son.Id, opt => opt.MapFrom(src => src.SonId)); 

這是我得到的例外：

表達式'dest =>轉換（dest.Son.Id）'必須解析爲頂級 成員an d沒有任何子對象的屬性。改爲使用 子類型或AfterMap選項上的自定義解析器。參數名： lambdaExpression

感謝

Answer 1

這將工作都映射到一個新的或現有的對象。

Mapper.CreateMap<FatherModel, Father>() 
    .ForMember(x => x.Son, opt => opt.MapFrom(model => model)); 
Mapper.CreateMap<FatherModel, Son>() 
    .ForMember(x => x.Id, opt => opt.MapFrom(model => model.SonId)); 

Answer 2

AutoMapper.Mapper.CreateMap<FatherModel, Father>() 
        .ForMember(x => x.Son, opt => opt.ResolveUsing(model => new Son() {Id = model.SonId})); 

，如果它變得越來越複雜，你可以寫一個ValueResolver類，見例如這裏 - http://automapper.codeplex.com/wikipage?title=Custom%20Value%20Resolvers

Answer 3

重複來自：https://stackoverflow.com/a/8944694/1586498

Mapper.CreateMap<DomainClass, Child>(); 
Mapper.CreateMap<DomainClass, Parent>() 
    .ForMember(d => d.Id, opt => opt.MapFrom(s => s.Id)) 
    .ForMember(d => d.A, opt => opt.MapFrom(s => s.A)) 
    .ForMember(d => d.Child, 
      opt => opt.MapFrom(s => Mapper.Map<DomainClass, Child>(s))); 

感謝：@justin-niessner