Ok, there are so many results in Google when you search for this topic; NerdDinner,CodeClimber,CodeProject etc.. but they all seems to be not working as expected! Either they give error during build or runtime! What is the right way to implement Unity 2.0 in ASP.Net MVC 2? I am simply not able to get this working!
Your help and thoughts are highly appreciated. Thanks!
Try writing a simple controller factory using Unity which is capable of resolving the controller instances:
public class UnityControllerFactory : DefaultControllerFactory
{
private readonly IUnityContainer _container;
public UnityControllerFactory(IUnityContainer container)
{
_container = container;
}
protected override IController GetControllerInstance(
RequestContext requestContext,
Type controllerType
)
{
if (controllerType == null)
{
throw new ArgumentNullException("controllerType");
}
if (!typeof(IController).IsAssignableFrom(controllerType))
{
throw new ArgumentException("Type requested is not a controller", "controllerType");
}
return _container.Resolve(controllerType) as IController;
}
}
and then hook it up in the Application_Start event in Global.asax:
protected void Application_Start()
{
...
var container = new UnityContainer();
// TODO: Configure the container here with your controllers
var factory = new UnityControllerFactory(container);
ControllerBuilder.Current.SetControllerFactory(factory);
}
This is my version of the UnityControllerFactory. It uses reflection to get the controllers from the calling assembly and register them in the container.
using System;
using System.Configuration;
using System.Linq;
using System.Reflection;
using System.Web.Mvc;
using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
namespace WebProveidorsMVC.DI.ControllerFactories
{
public class UnityControllerFactory : DefaultControllerFactory
{
private readonly IUnityContainer _container;
public UnityControllerFactory()
{
_container=new UnityContainer();
((UnityConfigurationSection) ConfigurationManager.GetSection("unity")).Configure(_container);
var controllerTypes = from t in Assembly.GetCallingAssembly().GetTypes()
where typeof(IController).IsAssignableFrom(t)
select t;
foreach (var t in controllerTypes)
_container.RegisterType(t, t.FullName);
}
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
{
if (controllerType != null)
return (IController)_container.Resolve(controllerType);
return null;
}
public override void ReleaseController(IController controller)
{
_container.Teardown(controller);
base.ReleaseController(controller);
}
}
}
Then in my ApplicationStart method I register it like this:
ControllerBuilder.Current.SetControllerFactory(new UnityControllerFactory());
