如何注入一个工厂的泛型类型与Autofac的 [英] How to inject a factory of generic types with Autofac

问题描述

我有一个仓库工厂 NhRepositoryFactory

public interface IRepositoryFactory  
{  
  IRepository<T> Create<T>() where T: Entity;  
} 

public class NhRepositoryFactory: IRepositoryFactory  
{  
  public IRepository<T> Create<T>() where T : Entity  
  {  
    return new NhRepository<T>();  
  }  
}

为了解决一些库的依赖我希望得到它们从Autofac容器。所以，我应该以某种方式注入 Func键< IRepository< T>> 工厂到我的课堂。我怎样才能做到这一点？结果
先谢谢了。

In order to resolve some repositories dependencies I want to get them from the Autofac container. So I should somehow inject Func<IRepository<T>> factory into my class. How can I accomplish this?
Thanks in advance.

推荐答案

的 NhRepositoryFactory 不包含业务逻辑，可以是你的根组成的一部分。这使您可以让它具有对容器的引用。 这仅仅是力学并不认为是服务定位器反模式。在 NhRepositoryFactory 将是这样的：

The NhRepositoryFactory contains no business logic and can be part of your composition root. This allows you to let it have a reference to the container. This is just mechanics and is not considered to be the Service Locator anti-pattern. The NhRepositoryFactory will look like this:

// This class is part of your composition root
public class NhRepositoryFactory : IRepositoryFactory  
{
    private readonly Container container;

    public NhRepositoryFactory(Container container)
    {
        this.container = container;
    }

    public IRepository<T> Create<T>() where T : Entity  
    {  
        return this.container.Resolve<NhRepository<T>>();
    }  
}

你可以这样注册它：

And you can register it like this:

builder.Register<IService>(c => new NhRepositoryFactory(c))
    .SingleInstance();

这篇关于如何注入一个工厂的泛型类型与Autofac的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！