How can I disable session state in ASP.NET MVC?

I would like to have a very lightweight ASP.NET MVC site which includes removing as many of the usual HttpModules as possible and disabling session state. However when I try to do this, I get the following error:

The SessionStateTempDataProvider requires SessionState to be enabled.

I've disabled session state in web.config:

<sessionState mode="Off" />

I understand that ASP.NET MVC uses session state for TempData, but I don't need/want TempData - I just want to disable session state. Help!

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小开

I've found one way, which I don't particularly care for:

Create NoTempDataProvider

using System;
using System.Collections.Generic;
using System.Web.Mvc;


namespace Facebook.Sites.Desktop.Auth.Models
{
public class NoTempDataProvider : ITempDataProvider
{
#region [ ITempDataProvider Members ]


public IDictionary<String, Object> LoadTempData(ControllerContext controllerContext)
{
return new Dictionary<String, Object>();
}


public void SaveTempData(ControllerContext controllerContext, IDictionary<String, Object> values) { }


#endregion
}
}

Manually Overwrite the Provider in the Controller

public class AuthController : Controller
{
public AuthController()
{
this.TempDataProvider = new NoTempDataProvider();
}
}

I would greatly prefer a way to do this completely via the configuration, but this works for now.

小开
最佳答案

You could make your own ControllerFactory and DummyTempDataProvider. Something like this:

public class NoSessionControllerFactory : DefaultControllerFactory
{
protected override IController GetControllerInstance(Type controllerType)
{
var controller = base.GetControllerInstance(controllerType);
((Controller) controller).TempDataProvider = new DummyTempDataProvider();
return controller;
}
}




public class DummyTempDataProvider : ITempDataProvider
{
public IDictionary<string, object> LoadTempData(ControllerContext controllerContext)
{
return new Dictionary<string, object>();
}


public void SaveTempData(ControllerContext controllerContext, IDictionary<string, object> values)
{
}
}

And then you would just need to register the controller factory on app startup - e.g. you could do this in global.asax:

ControllerBuilder.Current.SetControllerFactory(new NoSessionControllerFactory());
小开

If you need to use TempData for simple strings, you can use the CookieTempDataProvider in MvcFutures http://aspnet.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=24471.

小开

According to Brad Wilson, this has been fixed in MVC 2 Preview 1. See here and here.

小开

Modern solution:

In ASP.NET, if you do not use the Session object to store any data or if any of the Session events (Session_OnStart or Session_OnEnd) is handled, session state is disabled.

So not using Session (or TempData), disables Session State.

Source


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