HttpContext.Current.Session is null when routing requests

Question

Without routing, HttpContext.Current.Session is there so I know that the StateServer is working. When I route my requests, HttpContext.Current.Session is null in the routed page. I am using .NET 3.5 sp1 on IIS 7.0, without the MVC previews. It appears that AcquireRequestState is never fired when using the routes and so the session variable isn't instantiated/filled.

When I try to access the Session variables, I get this error:

base {System.Runtime.InteropServices.ExternalException} = {"Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration>.

While debugging, I also get the error that the HttpContext.Current.Session is not accessible in that context.

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My web.config looks like this:

<configuration>   ...   <system.web>     <pages enableSessionState="true">       <controls>         ...       </controls>     </pages>     ...   </system.web>   <sessionState cookieless="AutoDetect" mode="StateServer" timeout="22" />   ... </configuration> 

Here's the IRouteHandler implementation:

public class WebPageRouteHandler : IRouteHandler, IRequiresSessionState {     public string m_VirtualPath { get; private set; }     public bool m_CheckPhysicalUrlAccess { get; set; }      public WebPageRouteHandler(string virtualPath) : this(virtualPath, false)     {     }     public WebPageRouteHandler(string virtualPath, bool checkPhysicalUrlAccess)     {         m_VirtualPath = virtualPath;         m_CheckPhysicalUrlAccess = checkPhysicalUrlAccess;     }      public IHttpHandler GetHttpHandler(RequestContext requestContext)     {         if (m_CheckPhysicalUrlAccess             && !UrlAuthorizationModule.CheckUrlAccessForPrincipal(                    m_VirtualPath,                    requestContext.HttpContext.User,                    requestContext.HttpContext.Request.HttpMethod))         {             throw new SecurityException();         }          string var = String.Empty;         foreach (var value in requestContext.RouteData.Values)         {             requestContext.HttpContext.Items[value.Key] = value.Value;         }          Page page = BuildManager.CreateInstanceFromVirtualPath(                         m_VirtualPath,                          typeof(Page)) as Page;// IHttpHandler;          if (page != null)         {             return page;         }         return page;     } } 

I've also tried to put EnableSessionState="True" on the top of the aspx pages but still, nothing.

Any insights? Should I write another HttpRequestHandler that implements IRequiresSessionState?

Thanks.

Answer 1

Got it. Quite stupid, actually. It worked after I removed & added the SessionStateModule like so:

<configuration>   ...   <system.webServer>     ...     <modules>       <remove name="Session" />       <add name="Session" type="System.Web.SessionState.SessionStateModule"/>       ...     </modules>   </system.webServer> </configuration> 

Simply adding it won't work since "Session" should have already been defined in the machine.config.

Now, I wonder if that is the usual thing to do. It surely doesn't seem so since it seems so crude...