跨 MVC、WebAPI 和 WebForms 共享同一个 Unity 容器？

Question

Issue

The title probably doesn't use the correct terminology, but I think you should be able to figure out what I mean: I want to register the same services for use across all three technologies in the same project. I've read that it is possible to use Unity in a project with both MVC and Web API. But my project is a bit more interesting than that.

Background

I have a legacy (ancient) Webforms project running on .NET 4.7.2. We are actively working on converting the whole thing to Angular. The final goal being to convert to .NET Core/.NET 5 -- having only the Angular project and Web API in the final solution. My plan is to convert each .aspx page to an Angular component(s) and replace all the code-behind data access to Web API calls, one-at-a-time as I touch them. We are only using ASP.NET MVC to make it easier to authenticate/authorize against our IdentityServer 4 implementation.

What I know so far

I'm pretty sure I need to install the following three packages to get DI working in all three:

• Unity.Mvc
• Unity.AspNet.WebApi
• AspNet.WebFormsDependencyInjection.Unity

I've seen articles that describe how to use Unity with both ASP.NET MVC and Web API in the same project. But I'm still a little fuzzy on the whole thing.

Question

How do I wire up Unity for all three (ASP.NET MVC, Web API and Webforms) and register my services once for all three?

Answer 1

Alright well I've got Unity working in all three technologies. Unity.Mvc and Unity.AspNet.WebApi were easy since they both share the same scaffolded UnityConfig class in my project. The UnityConfig class creates the UnityContainer and keeps a static reference to it.

This package: AspNet.WebFormsDependencyInjection.Unity is no longer maintained and has some problems (project doesn't compile with this referenced). But I found an article (which I cannot find the URL to) that said to use HouseofCat.DependencyInjection.WebForms which at least compiles. However it creates its own instance of UnityContainer . So I had to look at what that code was doing and adapt it to reference the shared container from my UntityConfig .

Now I've got ctor injection in my API Controllers, MVC and WebForms. And I only have to register services once.