如何在同一ASP.Net MVC项目中使用Unity MVC和Unity WebAPI

Question

I'm trying to add a WebAPI to an existing ASP.Net MVC project and my question is regarding Unity:

Before with UnityMVC alone, the project had in the App_Start folder, the class UnityConfig with the following code:

container.RegisterType<IUnitOfWork, UnitOfWork>(new PerRequestLifetimeManager());
container.RegisterType<IDataContext, tfe_schemaContext>(new PerRequestLifetimeManager());

container.RegisterType<IPrintJobService, PrintJobService>(new PerRequestLifetimeManager());
container.RegisterType<IRepository<print_job>, Repository<print_job>>(new PerRequestLifetimeManager());

To use a WebAPI, I added UnityWebAPI via NuGet and this action added UnityMvcActivator class in the App_Start folder.

The following error displayed when I execute the project: "The type Unity.WebApi.UnityDependencyResolver does not appear to implement Microsoft.Practices.ServiceLocation.IServiceLocator. Parameter name: commonServiceLocator".

I found different examples of code using a Bootstrapper class but without using the UnityConfig class or UnityMvcActivator.

In the Bootrstrapper class, the registration of the types is like this:

container.RegisterType<IProductServices, ProductServices>().RegisterType<UnitOfWork>(new HierarchicalLifetimeManager());

I'm a little bit lost with all this, please help me understand and fix this error.

Answer 1

It seems you are using wrong or outdated NuGet packages. Try use Unity's official packages instead. Therefore remove any packages related to Unity and add following packages in Package Manager Console:

Install-Package Unity.Mvc
Install-Package Unity.AspNet.WebApi

Now you have one Unity container in your project which works well with MVC and WebAPI.

Answer 2

You can also try by separating the projects.

One project four you MVC code and another project for your WebAPI code. That way you will install Unity.MVC in your MVC project and Unity.WebAPI in your WebAPI project.

After that, you can consume the services from your MVC Application without any problem.