如何在Asp.net Core rc1中的静态方法中使用DI [英] How to use DI inside a static Method in Asp.net Core rc1

问题描述

我看到defaut模板使用ServiceProvder.GetService<ApplicationDbCotnext>()初始化DbContext， 但是当您进入静态方法时，我不知道如何获取DbContext，因为没有ServiceProvider. 有没有办法获取ServiceProvider?

I see defaut template use ServiceProvder.GetService<ApplicationDbCotnext>() to initialize a DbContext, But when you inside a Static Method, I have no idea how to get a DbContext, because there is no ServiceProvider. Is there a way to get the ServiceProvider ?

推荐答案

首先，这与asp.net-core本身无关.这与依赖注入的工作方式有关.您必须问自己为什么您的方法是静态的.真的有必要吗?

Well, first of all, this has nothing to do with asp.net-core per se. This has more to do with how Dependency Injection works. You have to ask yourself why your method is static. Is that really necessary?

如果您不能摆脱静态方法，不妨一路引入另一个反模式，即

If you can't get rid of your static method, you might as well go all the way and introduce another anti-pattern, the Service Locator Pattern. In short: In the Startup class you put a reference to the ServiceProvider in a static property (call it for instance "ServiceProviderSingleton") of a static class (for instance "ServiceProviderProvider"). This way you can just call "ServiceProviderProvider.ServiceProviderSingleton.GetService()".

同样，我建议给您的总体设计一个关键的外观.但是，如果这是您需要/想要的，那么我希望它会有所帮助.

Again, i suggest giving your overal design a critical look. But if this is what you need/want then I hope it helped.

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