How to register an AutoMapper profile with Unity

Question

I have the following AutoMapper profile:

public class AutoMapperBootstrap : Profile { protected override void Configure() { CreateMap<Data.EntityFramework.RssFeed, IRssFeed>().ForMember(x => x.NewsArticles, opt => opt.MapFrom(y => y.RssFeedContent)); CreateMap<IRssFeedContent, Data.EntityFramework.RssFeedContent>().ForMember(x => x.Id, opt => opt.Ignore()); } }

And I am initializing it like this:

var config = new MapperConfiguration(cfg => { cfg.AddProfile(new AutoMapperBootstrap()); }); container.RegisterInstance<IMapper>("Mapper", config.CreateMapper());

When I try to inject it in my constructor:

private IMapper _mapper; public RssLocalRepository(IMapper mapper) { _mapper = mapper; }

I recieve the following error:

The current type, AutoMapper.IMapper, is an interface and cannot be constructed. Are you missing a type mapping?

How can I initialize the AutoMapper profile properly with Unity, so that I can use the mapper anywhere through DI?

MaKCbIMKo · Accepted Answer · 2016-04-22 18:43:10Z

In your example you are creating named mapping:

// named mapping with "Mapper name" container.RegisterInstance<IMapper>("Mapper", config.CreateMapper());

But how your resolver will know about this name?

You need to register you mapping without name:

// named mapping with "Mapper name" container.RegisterInstance<IMapper>(config.CreateMapper());

It will map your mapper instance to IMapper interface and this instance will be returned on resolving interface

smoksnes · Accepted Answer · 2016-04-23 11:11:54Z

You can register it like so:

container.RegisterType<IMappingEngine>(new InjectionFactory(_ => Mapper.Engine));

Then you can inject it as IMappingEngine.

private IMappingEngine_mapper; public RssLocalRepository(IMappingEnginemapper) { _mapper = mapper; }

More information found here:

https://kalcik.net/2014/08/13/automatic-registration-of-automapper-profiles-with-the-unity-dependency-injection-container/

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