Alex Rivera | Logout

Ninject and ASP.NET Web API

Asked 2012-07-25T15:08:29.627
11

Before I set up the question you should know that I got my current code from this page: http://www.strathweb.com/2012/05/using-ninject-with-the-latest-asp-net-web-api-source/

I'm trying to use ASP.NET Web API and Ninject in my application by using an IDependencyResolver adapter found on the site above.

I created all the code just like it shows on the site and it works but when I load up my appication my regular controllers fail and show this error:

[MissingMethodException: No parameterless constructor defined for this object.]
[InvalidOperationException: An error occurred when trying to create a controller of type 'AccountManager.Controllers.HomeController'...

So, it seems like I can use Ninject with regular controllers or Web API controllers but not both. :(

Here is my code:

NinjectResolver.cs

public class NinjectResolver : NinjectScope, IDependencyResolver
{
    private IKernel _kernel;

    public NinjectResolver(IKernel kernel)
        : base(kernel)
    {
        _kernel = kernel;
    }

    public IDependencyScope BeginScope()
    {
        return new NinjectScope(_kernel.BeginBlock());
    }
}

NinjectScope.cs

public class NinjectScope : IDependencyScope
{
    protected IResolutionRoot resolutionRoot;

    public NinjectScope(IResolutionRoot kernel)
    {
        resolutionRoot = kernel;
    }

    public object GetService(Type serviceType)
    {
        IRequest request = resolutionRoot.CreateRequest(serviceType, null, new Parameter[0], true, true);
        return resolutionRoot.Resolve(request).SingleOrDefault();
    }

    public IEnumerable<object> GetServices(Type serviceType)
    {
        IRequest request = resolutionRoot.CreateRequest(serviceType, null, new Parameter[0
c# asp.net-mvc ninject
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3

I have a Web API project working using exactly the same solution as you from strathweb, so I just added a normal controller to the project, and it does work. Not a great help on it's own for you, so I'll detail the setup I've got:

I have the following packages installed (on the IOC side of things):

  • Ninject 3.0.1.10
  • Ninject MVC 3.0.0.6
  • Ninject.Web.Common 3.0.0.7
  • WebActivator 1.5.1

I have absolutely nothing in my Global.asax.cs file regarding Ninject, instead using the NinjectWebCommon.cs file that is automatically created in App_Start when you install Ninject. I don't know if by having code in your Global file that means that Ninject hasn't set itself up correctly in your project?

Here is the code in NinjectWebCommon.cs:

    public static class NinjectWebCommon 
{
    private static readonly Bootstrapper bootstrapper = new Bootstrapper();

    /// <summary>
    /// Starts the application
    /// </summary>
    public static void Start() 
    {
        DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
        DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
        bootstrapper.Initialize(CreateKernel);
    }

    /// <summary>
    /// Stops the application.
    /// </summary>
    public static void Stop()
    {
        bootstrapper.ShutDown();
    }

    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    private static IKernel CreateKernel()
    {
        var kernel = new StandardKernel();
        kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
        kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

        RegisterServices(kernel);

        GlobalConfiguration.Configuration.DependencyResolver = new NinjectResolver(k
answered 2012-07-26T13:43:55.843

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