Current.Handler is nothing within business object

[John Zullo]

When I look at the HTTPContext.Current at a breakpoint in a Business Object
instanntiated by a Page class, the Handler is set to nothing. It only has a
value from within the page class itself. I was hoping to get a reference to
the page object via CType(httpcontext.current.handler,page) Anything special
I need to do to be able to access this?

TIA,

John Zullo

 

[Brock Allen]

Yes, it's only available when accessed in the context of a client accessing
your webserver. When/where are you trying to access it?

-Brock
DevelopMentor
http://staff.develop.com/ballen

 

[John Zullo]

Did some debugging, and it looks like current.handler is only available to
controls after the page load has executed. I have tried this with the object
as a plain class and as one that inherits system.web.ui.control with the
same results.

 

[Brock Allen]

This makes no sense to me. The HttpContext.Current.Handler is available long
before the Page is even executed. So something else is wrong.

-Brock
DevelopMentor
http://staff.develop.com/ballen

 

[John Zullo]

Here is a link to a Google archive of this issue which I posted some time
ago.

http://groups-beta.google.com/group...dler+is+nothing&rnum=5&hl=en#7f7382b6a49b153d

Is there something that could be turned off in our server? I don't think we
use session state, but we use the application events in the global.aspx to
trap errors.

 

[John Zullo]

Sorry that was a link to the current thread. Here is a link to a much older
conversation in which I asked about this.

http://groups-beta.google.com/group...hing+john+zullo&rnum=2&hl=en#8b20b01051664f30

 

[John Zullo]

The current.handler is Nothing in the constructor of the business object.
Later in the business object it has a value.

 

[Brock Allen]

The current.handler is Nothing in the constructor of the business

object. Later in the business object it has a value.

Where is the business object being constructed?

-Brock
DevelopMentor
http://staff.develop.com/ballen

 

[John Zullo]

The business class is instantiated at the top of the page class:

Public Class GtRfcChanges1

Inherits System.Web.UI.Page



Protected GtDB As New GtDB

Protected GtDict As New GtDict

Protected GtLayout As New GtLayout(Me)

I would like to replace the declaration of GtLayout with

Protected GtLayout as GtLayout = GtLayout.Instance

so I can use a singleton pattern for this object, which I don't think I can
do if I have to pass the page object in the constructor.

 

[Brock Allen]

The business class is instantiated at the top of the page class:

Public Class GtRfcChanges1
Inherits System.Web.UI.Page
Protected GtLayout As New GtLayout(Me)

Ok, I bet your problem is that you're accessing Page.Request and not HttpContext.Current.Request
in the constructor. The Page does not yet have those references in its constructor.
Change your business logic to HttpContext.Current.Request instead and it
should work.

-Brock
DevelopMentor
http://staff.develop.com/ballen

 

[John Zullo]

I was trying to access HTTPConext.Current.Handler

 

[Scott Allen]

Hi John:

For web forms - the Handler property will be the Page object itself.
You won't be able to get a reference from inside the ctor since the
object hasn't yet been constructed!

 

[John Zullo]

I suppose that goes for the constructors of objects instantiated by the page
too.

 

[Scott Allen]

Correct - I couldn't quite determine what you needed to do at that
point or I'd offer a suggestion for a different approach.

 

[John Zullo]

Thanks all for your help.

Correct - I couldn't quite determine what you needed to do at that
point or I'd offer a suggestion for a different approach.