Custom ModelBinder Lifecycle and Dependency Injection [duplicate]
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05-07-2021 - |
سؤال
Possible Duplicate:
Inject a dependency into a custom model binder and using InRequestScope using Ninject
I'm trying to bind an NHibernate session to a custom model binder:
Since a custom model binder appears to be a singleton, I think I need to be concerned with thread safety. This is my current IoC code:
kernel.Bind<ISession>().ToProvider<SessionProvider>().InRequestScope()
.OnActivation(x => ServiceModelBinder.Service = kernel.Get<IServiceService>());
In my binder, I have the static service field decorated with the ThreadStatic
attribute, in an effort to avoid concurrency problems with the session.
Is this even a good idea?
Is there a better way to inject a per request scoped object into a view model? Or should I just not worry about how ugly it looks on paper and just grab the current session from the DependencyResolver
where needed?
المحلول
Stay well away from ThreadStaticAttribute in ASP.NET - the only correct way is to put stuff in HttpContext.Items
, but there always many better approaches to be tried before you go to
something low level like that.
Key problem here is that you are working with a bad assumption - model binders are shared between requests.