Using ASP.NET MVC 2 with Ninject 2 from scratch
- by Rune Jacobsen
I just did File - New Project last night on a new project. Ah, the
smell of green fields.
I am using the just released ASP.NET MVC 2 (i.e. no preview or release
candidate, the real thing), and thought I'd get off to a good start
using Ninject 2 (also released version) with the MVC extensions. I
downloaded the MVC extensions project, opened it in VS2008Sp1, built
it in release mode, and then went into the mvc2\build\release folder
and copied Ninject.dll and Ninject.Web.Mvc.dll from there to the
Libraries folder on my project (so that I can lug them around in
source control and always have the right version everywhere). I didn't
include the corresponding .xml files - should I? Do they just provide
intellisense, or some other function? Not a big deal I believe.
Anyhoo, I followed the most up-to-date advice I could find; I
referenced the DLLs in my MVC2 project, then went to work on
Global.asax.cs. First I made it inherit from NinjectHttpApplication. I
removed the Application_Start() method, and overrode OnApplicationStarted() instead. Here is that method:
protected override void OnApplicationStarted()
{
base.OnApplicationStarted();
AreaRegistration.RegisterAllAreas();
RegisterRoutes(RouteTable.Routes);
// RegisterAllControllersIn(Assembly.GetExecutingAssembly());
}
And I also followed the advice of VS and implemented the CreateKernel
method:
protected override Ninject.IKernel CreateKernel()
{
// RegisterAllControllersIn(Assembly.GetExecutingAssembly());
return new StandardKernel();
}
That is all. No other modifications to the project.
You'll notice that the RegisterAllControllersIn() method is commented
out in two places above. I've figured I can run it in three different
combinations, all with their funky side effects;
Running it like above.
I am then presented with the standard "Welcome to ASP.NET MVC" page in
all its' glory. However, after this page is displayed correctly in the
browser, VS shows me an exception that was thrown. It throws in
NinjectControllerFactory.GetControllerInstance(), which was called
with a NULL value in the controllerType parameter. Notice that this
happens after the /Home page is rendered - I have no idea why it is
called again, and by using breakpoints I've already determined that
GetControllerInstance() has been successfully called for the
HomeController. Why this new call with controllerType as null? I
really have no idea. Pressing F5 at this time takes me back to the
browser, no complaints there.
Uncommenting the RegisterAllControllersIn() method in
CreateKernel()
This is where stuff is really starting to get funky. Now I get a 404
error. Some times I have also gotten an ArgumentNullException on the
RegisterAllControllersIn() line, but that is pretty rare, and I have
not been able to reproduce it.
Uncommenting the RegisterAllControllers() method in
OnApplicationStarted()
(And putting the comment back on the one in CreateKernel())
Results in behavior that seems exactly like that in point 1.
So to keep from going on forever - is there an exact step-by-step
guide on how to set up an MVC 2 project with Ninject 2 (both non-beta
release versions) to get the controllers provided by Ninject? Of
course I will then start providing some actual stuff for injection
(like ISession objects and repositories, loggers etc), but I thought
I'd get this working first.
Any help will be highly appreciated!
(Also posted to the Ninject Google Group)
