Automapper ninject dependencies - asp.net

Question

I have a problem with the Automapper on my website and I can't find a solution.
I've created a class called AutoMapperProfile where I'd like to put all my Maps
public class AutoMapperProfile: Profile
{
private readonly IConfiguration _mapper;
public AutoMapperProfile(IConfiguration mapper)
{
_mapper = mapper;
}
protected override void Configure()
{
base.Configure();
_mapper.CreateMap<SlideDTO, Slide>();
_mapper.CreateMap<Slide, SlideDTO>();
}
}
For DI purposes I'm using Ninject, so I've added the following bindings in NinjectWebCommon:
kernel.Bind<IMappingEngine>().ToMethod(ctx => Mapper.Engine);
kernel.Bind<IConfigurationProvider>().ToMethod(x => Mapper.Engine.ConfigurationProvider);
The controller looks like this:
private readonly ISlideRepository slideRepository;
private readonly IMappingEngine mappingEngine;
public HomeController(
ISlideRepository slideRepository,
IMappingEngine mappingEngine)
{
this.slideRepository = slideRepository;
this.mappingEngine = mappingEngine;
}
[HttpGet]
public ActionResult Index()
{
var model = new IndexViewModel();
var slide = slideRepository.GetSlide();
model.Slide = mappingEngine.Map<SlideDTO, Slide>(slide);
return View(model);
}
When I map from SlideDTO to Slide I get the following error:
Missing type map configuration or unsupported mapping.
So my best guess is that I didn't do the binds correctly so that Automapper can see my maps, but I'm not sure how can I fix it.

Answer 1

You don't need to inject IConfiguration into AutoMapperProfile, it already inherits a CreateMap method from Profile.
Make sure that AutoMapperProfile has a parameterless constructor like this:
public class AutoMapperProfile : Profile
{
protected override void Configure()
{
this.CreateMap<SlideDTO, Slide>();
this.CreateMap<Slide, SlideDTO>();
}
}
And then you need to make sure that AutoMapper knows about this profile, here is how you can do it:
Mapper.Engine.ConfigurationProvider.AddProfile<AutoMapperProfile>();
Please note that you can invoke the AddProfile method on any IConfigurationProvider (if you decide not to use the global ConfigurationProvider and Engine).