c# - 使用 Unity 有条件地注入(inject)依赖项

Question

我正在使用 Unity (DI) 将我的注册服务注入(inject)到我的 Controller 中。

Controller

public class RenewalController : Controller
{
    private readonly IRegistrationService _registrationService;
    private readonly IRenewalTypedFactory _renewalFactory;

    public RenewalController(IRegistrationService registrationService, IRenewalTypedFactory renewalFactory)
    {
        _renewalFactory = renewalFactory;
        _registrationService = registrationService;
    }

    // GET: Renewal
    public ActionResult Renew()
    {
        return View();
    }

统一配置

container.RegisterType<IRegistrationService, RegistrationService>(new PerRequestLifetimeManager());

已经有一个注册服务，但我现在必须创建一个重写方法的续订服务类。

public class RenewalService : RegistrationService, IRegistrationService
{
   ...
}

如何让我的 Unity 配置仅在我的 Controller 请求时为我的 IRegistrationService 注入(inject)更新服务？

我知道在 Ninject 中你会做类似的事情:

.WhenInjectedInTo(typeof(RenewalController));

我读过这个问题，但无法理解它，也无法将其应用到我的示例中:

How to conditionally bind a instance depending on the injected type using unity?

Answer 1

告诉容器应该将什么依赖项注入(inject)RenewalController

container.RegisterType<RenewalController>(new InjectionConstructor(
             new ResolvedParameter<RenewalService>(), 
             new ResolvedParameter<IRenewalTypedFactory>()));