c# - 简单的喷油器诊断警告一次性瞬变

Question

我正在尝试配置简单的注入(inject)器来工作，但我似乎无法通过它。我按照此 link 中有关如何解决此问题的说明进行了操作但它没有用。这是错误消息:

NotificationEntities is registered as transient, but implements IDisposable.

这是 SimpleInjectorInitializer.cs 的代码

public static void Initialize()
{
    var container = new Container();
    container.Options.DefaultScopedLifestyle = new WebRequestLifestyle();

    InitializeContainer(container);

    container.RegisterMvcControllers(Assembly.GetExecutingAssembly());

    container.Verify();

    DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));
}

private static void InitializeContainer(Container container)
{
    container.Register<IEmailTemplateRepository, EmailTemplateRepository>();
}

NotificationEntities 是从 EF 生成的，所以它应该已经实现了，对吗？

Answer 1

The NotificationEntities is generated from EF so it should already implement that, correct?

是的，NotificationEntities 确实实现了 IDisposable，这正是警告的内容 telling你:

A registration has been made with the Transient lifestyle for a component that implements IDisposable.

这是一个问题，因为:

A component that implements IDisposable would usually need deterministic clean-up but Simple Injector does not implicitly track and dispose components registered with the transient lifestyle.

要解决此问题，您应该:

Register the component with the scoped lifestyle that is appropriate for the application you are working on.

换句话说，按如下方式注册您的NotificationEntities:

container.Register<NotificationEntities>(Lifestyle.Scoped);