DbContext Unity does not call HttpContextLifetimeManager.RemoveValue () Bad thing?

Question

I define my DbConntextObj

_container.RegisterType<IDbConntextObj, DbConntextObj>(new HttpContextLifetimeManager<DbConntextObj>()); 

Unity does not call RemoveValue () for lifetimemanager

I have one dbcontext for multiple repositories.

My lifetimemanager is as follows:

 public class HttpContextLifetimeManager<T> : LifetimeManager, IDisposable { private readonly string _itemName = typeof(T).AssemblyQualifiedName; public override object GetValue() { return HttpContext.Current.Items[_itemName]; } public override void RemoveValue() { var disposable = GetValue() as IDisposable; HttpContext.Current.Items.Remove(_itemName); if (disposable != null) disposable.Dispose(); } public override void SetValue(object newValue) { HttpContext.Current.Items[_itemName] = newValue; } public void Dispose() { RemoveValue(); } } 

Is it bad that DbContext Dispose is not being called? Is there a workaround for Unity and MVC3?

Answer 1

Try it.

  public class MvcApplication : HttpApplication { private IUnityContainer unityContainer; private HttpContextDisposableLifetimeManager ContextLifeTimeManager; /// <summary> /// The start method of the application. /// </summary> protected void Application_Start() { unityContainer = new UnityContainer(); ContextLifeTimeManager = new HttpContextDisposableLifetimeManager(); //for some reason this event handler registration doesn't work, meaning we have to add code to //Application_EndRequest as below... //this.EndRequest += new EventHandler(ContextLifeTimeManager.DisposingHandler); unityContainer.RegisterType<IUnitOfWork, EFUnitOfWork>(ContextLifeTimeManager); unityContainer.RegisterType<IRepository<ShoppingCart>, ShoppingCartRepository>(new ContainerControlledLifetimeManager()); } //this seems hackish, but it works, so whatever... protected void Application_EndRequest(Object sender, EventArgs e) { if (ContextLifeTimeManager != null) { ContextLifeTimeManager.RemoveValue(); } } } 

Then in your implementation of LifeTimeManager.

 public class HttpContextDisposableLifetimeManager : LifetimeManager, IDisposable { const string _itemName = typeof(T).AssemblyQualifiedName; public void DisposingHandler(object source, EventArgs e) { RemoveValue(); } public override object GetValue() { return HttpContext.Current.Items[_itemName]; } public override void RemoveValue() { Dispose(); HttpContext.Current.Items.Remove(_itemName); } public override void SetValue(object newValue) { HttpContext.Current.Items[_itemName] = newValue; } public void Dispose() { var obj = (IDisposable)GetValue(); obj.Dispose(); } }