AutoMapper: Mapping child member from complex type to string[]

Question

I have a destination type with a string[] property.

Animal
  string[] Barks;

My source object is:

  AnimalDTO
     List<BarkTypes> Barks;

How do I map BarkTypes.NameOfBark to the string[] Barks?

Something like this:?

Mapper.CreateMap<AnimalDTO, Animal>()
   .ForMember(dest => dest.Barks, y => y.MapFrom(x=>x.??????))

score 3 · Answer 1 · edited Feb 21 '13 at 19:03

3

Completely untested, but:

Mapper.CreateMap<AnimalDTO, Animal>()
   .ForMember(dest => dest.Barks, 
              y => y.MapFrom(x=>x.Barks
                                 .Select(z => z.NameOfBark)
                                 .ToArray());

edited Feb 21 '13 at 19:03

Ian Vink

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answered Feb 20 '13 at 23:14

Martin

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D Stanley · Accepted Answer · 2013-02-21T18:51:54.100

3

You want ResolveUsing:

Mapper.CreateMap<AnimalDTO, Animal>()
      .ForMember(dest => dest.Barks,
                    y => y.ResolveUsing(x=>x.Barks
                                            .Select(b=>b.NameOfBark)
                                            .ToArray())
              )

edited Feb 21 '13 at 18:51

answered Feb 20 '13 at 23:19

D Stanley

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Is this method safer than using Martin's answer with a simple Select? – Ian Vink Feb 21 '13 at 18:44
I don't think using `MapFrom` will work since that method requires an expression that points to a property. Other than that they should be the same. – D Stanley Feb 21 '13 at 18:52

AutoMapper: Mapping child member from complex type to string[]

2 Answers2