简单的注入器注册自动化器

Question

I would like to register Automapper with Simple Injector to inject it into the controller:

public class MyController : BaseController
{
    private IUnitOfWork unitOfWork;
    private IMappingEngine mappingEngine;

    public PatientController(IUnitOfWork _unitOfWork, IMappingEngine _mappingEngine)
    {
        this.unitOfWork = _unitOfWork;
        this.mappingEngine = _mappingEngine;
    }
}

However when I am trying to register it

public static void Initialize()
{
    //Code for registering our repository class and DI
    var container = new Container();
    container.Register<IUnitOfWork, UnitOfWork>();

    container.Register<IMappingEngine, MappingEngine>();

    container.RegisterMvcControllers(Assembly.GetExecutingAssembly());
    DependencyResolver.SetResolver(
        new SimpleInjectorDependencyResolver(container));
}

I got an error:

For the container to be able to create MappingEngine, it should contain exactly one public constructor, but it has 2.

Parameter name: TImplementation.

What am I doing wrong?

Answer 1

Simple Injector can't automatically auto-wire the MappingEngine type for you, and it shouldn't, because this is a framework type and framework types should not be auto-wired, as you can read here .

Instead, use manual wiring, as follows:

var container = new Container();

container.RegisterSingle<IMappingEngine>(Mapper.Engine);