如何使用Simple Injector返回基于其父对象的实例？ [英] How to return an instance based on its parent using Simple Injector?

问题描述

我们一直在使用温莎城堡作为我们的DI集装箱，但我们正在寻找替代方案。现在，我进入了简单注入器，到目前为止，它的简单性给我留下了深刻的印象，但是现在我遇到的一种情况是，当我们对某些组件使用后期绑定实例化时。

We have been using Windsor Castle as our DI Container but we are looking around for alternatives. Now I got to the Simple Injector and so far I have been impressed by its simplicity but one scenario I am stuck at right now is when we are using late bound instantiation for some of our components.

我的第一个问题是，可能吗？

My first question is, is it even possible?

使用温莎（Windsor）就是这样；

With Windsor it is done like this;

Container.Register(Component.For<ILogger>()
    .UsingFactoryMethod(
        (kernel, componentModel, context) => new Logger(
            context.Handler.ComponentModel.Implementation.Name));

是否可以使用Simple Injector进行相同的操作？

Is there a way to do the same with Simple Injector?

推荐答案

使用Simple Injector，您将只需：

With Simple Injector, you will just have to either:

1. 注册一个使用 Register< Func< A，B，C>>（（（a，b）=> {...}}）
$ b明确地进行Func委托$ b
2. 创建一个接口，例如 ILoggerFactory ，创建一个实现并注册它们。

1. Register a Func delegate explicitly using Register<Func<A, B, C>>((a, b) => { ... })
2. Create an interface such as ILoggerFactory, creste an implementation and register them.

更新

再次阅读问题并查找Castle的 UsingFactoryMethod 我得出的结论是我误解了您的问题。或根据其父类型创建实例：基于上下文的注入。

After reading your question again and looking up the definition of Castle's UsingFactoryMethod I came to the conclusion that I misinterpreted your question. What you are looking for is creating an instance based on its parent type: Context Based Injection.

您可以通过实现基于上下文的注入扩展方法，在Simple Injector文档Wiki上作为示例给出。

You can achieve this by implementing the Context Based Injection Extension method that is given as example on the Simple Injector's documentation wiki.

将此扩展方法添加到项目中时您可以执行以下等效注册：

When you add this extension method to your project you can do the equivalent registration as follows:

container.RegisterWithContext<ILogger>(context =>
{
    return new Logger(context.ImplementationType.Name);
});

这篇关于如何使用Simple Injector返回基于其父对象的实例？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！