如何在.NET Core中获取IServiceProvider的实例？

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IServiceProvider 是具有单个方法的接口：

IServiceProvider is an interface with single method:

object GetService(Type serviceType);

用于创建在.NET Core本机DI容器中注册的类型的实例。

It's used to create instances of types registered in .NET Core native DI container.

IServiceProvider 本身的实例可以通过调用 BuildServiceProvider 方法获得 IServiceCollection 。 IServiceCollection 是 Startup 类中 ConfigureServices 方法的参数。框架似乎用 IServiceCollection 的实例神奇地调用了它。

An instance of IServiceProvider itself can be obtained by calling a BuildServiceProvider method of an IServiceCollection. IServiceCollection is a parameter of ConfigureServices method in a Startup class. It seems to be magically called with an instance of IServiceCollection by the framework.

我想创建一个实例 IServiceProvider 完全没有 Setup 方法。我需要它来解决集成测试程序集中的依赖关系。在这种情况下，能否完全获得它？

I want to create an instance of IServiceProvider without having Setup method at all. I need it to resolve dependencies in an integration test assembly. Is it possible to get it at all in this scenario?

推荐答案

这是 IServiceCollection的默认实现从Microsoft： https ：//github/aspnet/DependencyInjection/blob/master/src/DI/ServiceCollection.cs

This is the default implementation of IServiceCollection from Microsoft: github/aspnet/DependencyInjection/blob/master/src/DI/ServiceCollection.cs

看看代码，您应该可以只需调用以下命令即可获取 IServiceCollection ：

Looking at the code then you should be able to get an IServiceCollection simply by calling:

var serviceCollection = new Microsoft.Extensions.DependencyInjection.ServiceCollection();

希望有帮助：）