CODEWITHSUNDEEP
c#visual-studioasp.net-mvc-4dependency-injectionsimple-injector
ray9209
ray9209

Reputation: 388

Unable to use Simple Injector for DI

I'm new to using DI and ASP.NET and I'm having a hard time getting Simple Injector to work. I've added SimpleInjector 3.1.5 as a reference using NuGet. Here is what I have so far:

Global.asax.cs:

...
using SimpleInjector;
using SimpleInjector.Integration.WebApi;
using SimpleInjector.Integration.Web;
using SimpleInjector.Integration.Web.Mvc;
...
protected void Application_Start()
{
        Database.SetInitializer<ProductContext>(new ProductInitializer());
        AreaRegistration.RegisterAllAreas();
        WebApiConfig.Register(GlobalConfiguration.Configuration);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        AuthConfig.RegisterAuth();

        var container = new Container();
        container.Options.DefaultScopedLifestyle = new WebRequestLifestyle();

        container.Register<IProductRepository, ProductRepository>(Lifestyle.Scoped);

        container.RegisterMvcControllers(Assembly.GetExecutingAssembly());

        container.RegisterWebApiControllers(GlobalConfiguration.Configuration);

        container.RegisterMvcIntegratedFilterProvider();

        container.Verify();
}

Main controller:

...
public class DefaultController : Controller
{
    private ProductRepository productRepo;

    public DefaultController(ProductRepository pr)
    {
        this.productRepo = pr;
    }
...

Product Repository class:

...
public class ProductRepository:IProductRepository
{
    private ProductContext db;

    public ProductRepository(ProductContext db)
    {
        this.db = db;
    }

    public IEnumerable<Product> GetAll()
    {
        return db.Products.ToList();
    }
...

When I try to run my program, I get this error:

The configuration is invalid. The following diagnostic warnings were reported:

-[Lifestyle Mismatch] ProductRepository (Web Request) depends on ProductContext (Transient).

-[Short Circuited Dependency] DefaultController might incorrectly depend on unregistered type ProductRepository (Transient) instead of IProductRepository (Web Request).

-[Disposable Transient Component] ProductContext is registered as transient, but implements IDisposable.

-[Ambiguous Lifestyles] The registration for IProductRepository (Web Request) maps to the same implementation (ProductRepository) as the registration for ProductRepository (Transient) does, but the registration maps to a different lifestyle. This will cause each registration to resolve to a different instance.

-[Ambiguous Lifestyles] The registration for ProductRepository (Transient) maps to the same implementation (ProductRepository) as the registration for IProductRepository (Web Request) does, but the registration maps to a different lifestyle. This will cause each registration to resolve to a different instance.

See the Error property for detailed information about the warnings. Please see https://simpleinjector.org/diagnostics how to fix problems and how to suppress individual warnings.

Upvotes: 2

Views: 1734

Answers (1)

Saibamen
Saibamen

Reputation: 658

Please update you Simple Injector to latest version and check updated documentation:

ASP.NET Core: https://simpleinjector.readthedocs.io/en/latest/aspnetintegration.html ASP.NET MVC: https://simpleinjector.readthedocs.io/en/latest/mvcintegration.html

Or select your integration option from left sidebar menu

Upvotes: 0

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