c# – 简单的注入器注册自动化器

我想用Simple Injector注册Automapper,将它注入控制器：

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

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

但是,当我试图注册它

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));
}

我收到一个错误：

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

Parameter name: TImplementation.

我究竟做错了什么？

解决方法:

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.

而是使用手动布线,如下所示：

var container = new Container();

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

标签：c,dependency-injection,asp-net-mvc,automapper,simple-injector
来源： https://codeday.me/bug/20190628/1317667.html