c# - 简单注入(inject)器注册自动映射器

Question

我想用 Simple Injector 注册 Automapper 以将其注入(inject) Controller :

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

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

但是当我尝试注册它时

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));
}

我遇到了一个错误:

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

Parameter name: TImplementation.

我做错了什么？

Answer 1

Simple Injector 不能自动为您自动连接 MappingEngine 类型，它不应该，因为这是一个框架类型，框架类型不应该自动连接，因为您可以阅读 here .

改为使用手动接线，如下:

var container = new Container();

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