c# - ASP.NET Core DependencyResolver

Question

In ASP.NET MVC 5 is possible to obtain some dependency through DependencyResolver.Current.GetService<T>(). Is there something similar in ASP.NET Core?

Answer 1

Yes, there is. In ASP.NET Core 1.0.0, the services available within a request from HttpContext are exposed through the RequestServices collection^[1]:

this.HttpContext.RequestServices

You can use the GetService method to retrieve the dependencies by specifying the type of the dependency:

this.HttpContext.RequestServices.GetService(typeof(ISomeService));

Generally, you shouldn’t use these properties directly, preferring instead to request the types your classes you require via your class’s constructor, and letting the framework inject these dependencies. This yields classes that are easier to test and are more loosely coupled.

_{[1] https://docs.asp.net/en/latest/fundamentals/dependency-injection.html#request-services}