Session state can only be used when enableSessionState is set to true either in a configuration

Question

I am working on Asp net MVC 2 app with c  by using vs 2010 I am having below mentioned error when I run my app locally under debug mode   Error message image is as below       Error message text is as below        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  lt configuration gt   lt system web gt   lt httpModules gt    section in the application configuration    What I did for sort out this issue are as below    Try 1   web config file has been changed like below    lt system webServer gt          lt modules runAllManagedModulesForAllRequests  true  gt           lt remove name  Session    gt           lt add name  Session  type  System Web SessionState SessionStateModule  System Web  Version 2 0 0 0  Culture neutral  PublicKeyToken b03f5f7f11d50a3a    gt       lt  modules gt   lt  system webServer   Try 2 is as below      But Unfortunately still I am having same issue which I have mentioned Above   UPDATE    Do you have any solution for this

User · Answer

This error was raised for me because of an unhandled exception thrown in the Public Sub New() (Visual Basic) constructor function of the Web Page in the code behind.

If you implement the constructor function wrap the code in a Try/Catch statement and see if it solves the problem.

User · Answer

Following answer from below given path worked fine   I found a solution that worked perfectly  Add the following to web config    lt system webServer gt   lt modules gt   lt  -- UrlRewriter code here -- gt   lt remove name  Session    gt   lt add name  Session  type  System Web SessionState SessionStateModule  preCondition      gt   lt  modules gt   lt  system webServer gt    Hope this helps someone else

User · Answer

I have got this error only when debugging the ASP  Net Application    I also had Session  mysession   kind of variables added into my Watch of Visual Studio    the issue was solved Once  I have removed the Session Variables from watch

User · Answer

Did you enable the session state in the  section as well     lt system web gt         lt pages enableSessionState  true    gt     lt  system web gt    Or did you add this to the page     lt   Page enableSessionState  true  gt     And did you verify that the ASP NET Session State Manager Service service is running  In your screenshot it isn t  It s set to start-up mode Manual which requires you to start it every time you want to make use of it  To start it  highlight the service and click the green play button on the toolbar  To start it automatically  edit the properties and adjust the Start-up type   Or set the SessionState s mode property to InProc  so that the state service is not required     lt system web gt         lt sessionState mode  InProc    gt    lt  system web gt    Check MSDN for all the options available to you with regards to storing data in the ASP NET session state     Note  It s better to have your Controller fetch the value from the session and have it add the value to the Model for your page control  or to the ViewBag   that way the View doesn t depend on the HttpSession and you can choose a different source for this item later with minimal code changes  Or even better  not use the session state at all  It can kill you performance when you re using a lot of async javascript calls

User · Answer

For SharePoint Can find the web config file in C  inetpub wwwroot wss VirtualDirectories Sitecollection port number - and Make changes    lt system web gt     lt pages enableSessionState  true    gt     lt  system web gt    and using SharePoint Management Shell Run below Command     Enable-SPSessionStateService -DefaultProvision

User · Answer

I want to let everyone know that sometimes this error just is a  result of some weird memory error   Restart your pc and go back into visual studio and it will be gone    Bizarre  Try that before you start playing around with your web config file etc like I did       -

User · Answer

In my case problem went away simply by using HttpContext Current Session instead of Session

User · Answer

Session State may be broken if you have the following in Web Config    lt httpModules gt     lt clear  gt   lt  httpModules gt    If this is the case  you may want to comment out such section  and you won t need any other changes to fix this issue

User · Answer

Actually jessehouwing gave the solution for normal scenario   But in my case I have enabled 2 types of session in my web config file  It s like below   First one     lt modules runAllManagedModulesForAllRequests  true  gt           lt remove name  Session    gt           lt add name  Session  type  System Web SessionState SessionStateModule  System Web  Version 2 0 0 0  Culture neutral  PublicKeyToken b03f5f7f11d50a3a    gt   lt  modules gt    Second one     lt sessionState mode  Custom  customProvider  DefaultSessionProvider  gt               lt providers gt                   lt add name  DefaultSessionProvider  type  System Web Providers DefaultSessionStateProvider  System Web Providers  Version 1 0 0 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  connectionStringName  PawLoyalty  applicationName  PawLoyalty   gt               lt  providers gt    lt  sessionState gt    So in my case I have to comment Second one B cos that thing for the production When I commented out second one my problem vanished

User · Answer

I realise there is an accepted answer  but this may help people  I found I had a similar problem with a ASP NET site using NET 3 5 framework when running it in Visual Studio 2012 using IIS Express 8  I d tried all of the above solutions and none worked - in the end running the solution in the in-built VS 2012 webserver worked  Not sure why  but I suspect it was a link between 3 5 framework and IIS 8

User · Answer

Could be your skype intercepting your requests at 80 port  in Skype options uncheck Or Your IE has connection checked for Proxy when there is no proxy  Or your fiddler could intercept and act as proxy  uncheck it    Solves the above problem  It solved mine    HydTechie

User · Answer

also if you are running SharePoint and encounter this error  don t forget to run  Enable-SPSessionStateService -DefaultProvision   or you will continue to receive the above error message

[.net] Session state can only be used when enableSessionState is set to true either in a configuration

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