HttpContext.Current.Session is null asp.net

Question

I've got a problem with HttpContext.Current.Session. I try to enable session state on my application. I did a few things:

add to my web.config:

<sessionState 
   cookieless="UseCookies"
   regenerateExpiredSessionId="true"
   mode="InProc"
   timeout="20"/>

I want to use cookies too so I set up cookieless="UseCookies".

After that I added:

<pages enableSessionState="true">

this page section isn't closed because contains a few namespaces like that:

<pages enableSessionState="true">
 <namespaces>
   <add namespace="..."/>
 </namespaces>
</pages>

In my Global.asax.vb I created two event handlers:

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
    ' Fires when the session is started
End Sub

and

 Sub Session_End(ByVal sender As Object, ByVal e As EventArgs)
    ' Fires when the session ends 
 End Sub

I created some c# class which will be management my session:

 public class MySession
 {
    public static void Add(string key, object value)
    {
        if (HttpContext.Current.Session != null && (HttpContext.Current.Session.Keys == null || (HttpContext.Current.Session.Keys != null && HttpContext.Current.Session[key] == null)))
        {
            HttpContext.Current.Session.Add(key, value);
        }
    }

    public static void Remove(string key)
    {
        ...
    }

    public static void Update(string key, object value)
    {
        ...
    }

    public static object GetValue(string key)
    {
        ...
    }
}

It's all what I did in code and yeah - my app using vb and c# too. So when I try to use MySession.Add(someKey, someValue) always I've got a HttpContext.Current.Session == null.

It's my first time when I try turn on a session in app so I need help with this. I was looking for any solution into google but they either didn't work or they were not for me.

Any idea?

I haven't any error just first condition of if statement on Add method is false because HttpContext.Current.Session == null. I thought that if I turn on session state in web.config and put enableSesionState in pages section - the session will be automatic created. — Presto
In Session_Start event have you checked HttpContext.Current.Session != null is true or false? — Mohsin Mehmood
ok I found something. When I implemented Application_AcquireRequestState event handler. It's void a few times - once Session isn't null nextly is null. — Presto
@MohsinMehmood in Session_Start event HttpContext.Current.Session isn't null — Presto

Presto Presto · Accepted Answer · 2018-08-23T11:59:42

I found the answer how to solve my problem. I have to use something like Pipeline (on proper place in code with proper code logic).

More informations are on this on StackOverflow link or on direct link on Microsoft Docs.

HttpContext.Current.Session is null asp.net

1 Answers