C# – ASP.NET: Session state not updated when redirecting in explorer

asp.netc

I have an aspx page (page1.aspx) where I set a Session variable and then redirect to another page:

HttpContext.Current.Response.Redirect("page2.aspx");

On page2.aspx I want to read the session variable, but it doesn't exist until I reload the page. I try to read the session variable in page_load.

The weird thing is that it works in firefox, but not in explorer??

(Note that I've simplied this a bit to explain the problem page1.aspx is accessed from my HttpModule that and is rewritepathed (my workaround to get access to Session). So the flow is HttpModule -pathrewrite-> page1.aspx (set session var) -redirect-> page.2.aspx.)

Best Answer

Try switching your Response Redirect to:

Response.Redirect("page2.aspx",false);
HttpContext.Current.ApplicationInstance.CompleteRequest();

The nominal Redirect(url) implicitly calls Redirect("url", true) which throws a ThreadAbortException. The ThreadAbortException raised is a special exception when it is done as such inside ASP.NET. This exception while it can be caught cannot be muted. It will continue to bubble up the ASP.NET call chain to cause the current worker thread to immediately terminate.

It's possible that the abrupt termination could be impacting this.

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R – ASP.NET Page calls an additional aspx page after loading

Thanks for the tip Andrew.

We figured out what was going on... Page1.aspx in the application is really Default.aspx. On Page2.aspx, another developer put a img tag on the page that did not have src property defined. So when Page2.aspx executed, it was looking for an image located at the web site's root level, this then triggered the code on Default.aspx (Page1) and wipe away the session.

Overall it looked something like this...

On Page2.aspx

<img src=""> <!-- this ended up triggering a call to Default.aspx, wiping the session -->

Hopefully that helps out someone else.

C# – Asp.net theme not applied to derived pages

Make sure you are using the base keyword to call the appropriate overridden base class members from within your derived class.

public class MyBasePage : System.Web.UI.Page
{
    protected override void OnInit(EventArgs e)
    {
        // Call the base class's OnInit method
        base.OnInit(e);
    }

    protected override void OnLoad(EventArgs e)
    {
       // Call the base class's OnLoad method
       base.OnLoad(e);
    }       
}

Best Answer

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R – ASP.NET Page calls an additional aspx page after loading

C# – Asp.net theme not applied to derived pages

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