C#/Unity 中的构造函数注入? [英] Constructor Injection in C#/Unity?

问题描述

我将 C# 与 Microsoft 的 Unity 框架结合使用.我不太确定如何解决这个问题.这可能与我对 DI 与 Unity 缺乏了解有关.

I'm using C# with Microsoft's Unity framework. I'm not quite sure how to solve this problem. It probably has something to do with my lack of understanding DI with Unity.

可以使用以下示例代码来总结我的问题:

My problem can be summed up using the following example code:

class Train(Person p) { ... }

class Bus(Person p) { ... }

class Person(string name) { ... }

Person dad = new Person("joe");
Person son = new Person("timmy");

当我在 Bus 上调用 resolve 方法时，如何确定注入了名为 'timmy' 的 Person 'son' 以及在解析 Train 时如何确定名为 'joe' 的 Person 'dad'解决了吗?

When I call the resolve method on Bus how can I be sure that the Person 'son' with the name 'timmy' is injected and when resolving Train how can I be sure that Person 'dad' with then name 'joe' is resolved?

我在想也许使用命名实例?但我不知所措.任何帮助将不胜感激.

I'm thinking maybe use named instances? But I'm at a loss. Any help would be appreciated.

顺便说一句，我宁愿不创建 IPerson 界面.

As an aside, I would rather not create an IPerson interface.

推荐答案

解决此问题的一种方法是使用具有命名注册的注入构造函数.

One way to solve this would be to use an injection constructor with a named registration.

// Register timmy this way  
Person son = new Person("Timmy");  
container.RegisterInstance<Person>("son", son);  

// OR register timmy this way  
container.RegisterType<Person>("son", new InjectionConstructor("Timmy"));  

// Either way, register bus this way.  
container.RegisterType<Bus>(new InjectionConstructor(container.Resolve<Person>("son")));  

// Repeat for Joe / Train

这篇关于C#/Unity 中的构造函数注入?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！