Asp.Net Session is null in ashx file

Question

I am trying to access the Session variable in Asp.Net ashx handler as shown below.

public void ProcessRequest (HttpContext context) {
        context.Session["VariableName"] = Id;
    }

But the context.Session is always Null inside the above method. How do I access Session objects in ashx file?

score 97 · Accepted Answer · answered Jan 28 '10 at 17:30

97

You have to "implement" either IRequiresSessionState or IReadOnlySessionState, with former providing full access to session, and the latter providing read-only access.

I'm quoting "implement" here because these two are so-called "marker interfaces", which means they have no members.

answered Jan 28 '10 at 17:30

Anton Gogolev

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3

Have an upvote good sir. My only regret is that I can only give one. – CountMurphy Oct 17 '11 at 20:46
Great! And about the "marker interfaces", wouldn't it be better if they made this as Annotations? – everton Dec 22 '11 at 12:54
8

by "implement" Anton means having: public class ClassName : IHttpHandler, System.Web.SessionState.IRequiresSessionState{...} – adinas Feb 14 '12 at 13:30

score 2 · Answer 2 · answered Jun 23 '14 at 19:21

In VB, implement the interfaces mentioned by Anton (IRequiresSessionState or IReadOnlySessionState) like this:

Public Class MyAshxFile

    Implements System.Web.IHttpHandler
    Implements System.Web.SessionState.IRequiresSessionState ''need this for session variables
    Implements System.Web.SessionState.IReadOnlySessionState ''need this for session variables

Asp.Net Session is null in ashx file

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