CODEWITHSUNDEEP
asp.netinversion-of-controlunity-containerioc-container
Vitalii
Vitalii

Reputation: 11071

Microsoft Unity IoC does not work and ASP.NET mvc4 application. Why?

I'm trying to set up Unity IoC container to ASP.NET mvc4 application. I created empty project and using package management console installed next products

Everything finished successfully. But after I run my application I have exception

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.MissingMethodException: Cannot create an instance of an interface.

Here is simple code. Global.asax.cs

public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();

        WebApiConfig.Register(GlobalConfiguration.Configuration);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);

        Bootstrapper.Initialise();
    }
}

public interface IA
{
    void test();
}
public class A : IA
{
    public A() { }
    public void test()
    {
        throw new NotImplementedException();
    }
}

HomeController.cs

public class HomeController : Controller
{
    //
    // GET: /Home/

    public ActionResult Index(IA a)
    {
        return View();
    }

}

Bootstrapper.cs:

public static class Bootstrapper
{
    public static void Initialise()
    {
        var container = BuildUnityContainer();

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));
    }

    private static IUnityContainer BuildUnityContainer()
    {
        var container = new UnityContainer();

        container.RegisterType<IA, A>();          

        return container;
    }
}

What am I doing wrong and why code does not work?

Stack trace:

Stack Trace: [MissingMethodException: Cannot create an instance of an interface.] System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0 System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98 System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241 System.Activator.CreateInstance(Type type, Boolean nonPublic) +69 System.Web.Mvc.DefaultModelBinder.CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) +199 System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +572 System.Web.Mvc.DefaultModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) +454 System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor) +317 System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor) +117 System.Web.Mvc.Async.<>c_DisplayClass25.b_1e(AsyncCallback asyncCallback, Object asyncState) +476 System.Web.Mvc.Async.WrappedAsyncResult1.Begin(AsyncCallback callback, Object state, Int32 timeout) +124 System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +304 System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) +30 System.Web.Mvc.Async.WrappedAsyncResult1.Begin(AsyncCallback callback, Object state, Int32 timeout) +124 System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +389 System.Web.Mvc.Async.WrappedAsyncResult1.Begin(AsyncCallback callback, Object state, Int32 timeout) +124 System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +319 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +15 System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +76 System.Web.Mvc.Async.WrappedAsyncResult1.Begin(AsyncCallback callback, Object state, Int32 timeout) +124 System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +251 System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +50 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8837208 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Upvotes: 1

Views: 2547

Answers (1)

Idrees Khan
Idrees Khan

Reputation: 7752

I exactly don't know what's wrong with yours but here is the settings that works for me;

public static class Bootstrapper
{
    public static void Initialise()
    {
        var container = BuildUnityContainer();
        DependencyResolver.SetResolver(new UnityDependencyResolver(container));
    }

    private static IUnityContainer BuildUnityContainer()
    {
        var container = new UnityContainer();
        container.RegisterType<ICategoryRepository, CategoryRepository>(new HierarchicalLifetimeManager());
        return container;
    }
}

Global.asax

 Bootstrapper.Initialise();

now, in my controller constructor;

ICategoryRepository _catRepo;

public CategoryController(ICategoryRepository catRepo)
{
    _catRepo = catRepo;
}
public ActionResult Index()
{
    ViewBag.CategoriesList = _catRepo.GetAllCategories();
    return View();
}

Upvotes: 4

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