Re: Static variables "lose" value

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From: Kevin Spencer (kspencer_at_takempis.com)
Date: 08/04/04 

Date: Wed, 4 Aug 2004 13:34:11 -0400

In order to help you, I will need more exact information. You said that your
static variables "are used to store values (objects) that are read during
the startup from the DB." I need to know:

1. Where are they stored?
2. How are they fetched from the DB (what event handler loads them)?
3. What "something" happens to cause the error? 

-- 
HTH,
Kevin Spencer
.Net Developer
Microsoft MVP
Big things are made up
of lots of little things.
"Simone Chiaretta" <SimoneChiaretta@discussions.microsoft.com> wrote in
message news:F7D9AC77-1796-4707-8E6C-9A2F8F43ED42@microsoft.com...
> OK... I'm not english mother tongue, so maybe there was a
mis-understanding :-)
>
> In my application static var are used to store values (objects) that are
read during the startup from the DB.
> When I said that "restore static variables' values" I meant that they are
reinitialized
>
> What I've is that when something happens, then all lines of code that
access to any static variable throws a "System.NullReferenceException -
Object reference not set to an instance of an object"
>
> -- 
> Simone Chiaretta
> Milan, Italy
> .Net Web Developer
>
>
> "Kevin Spencer" wrote:
>
> > Your orginal post stated that static variables were losing their values.
> > Re-starting the app doesn't restore static variables' values: It
> > re-initializes them.
> >
> > Static variables and objects are stored in the application heap. There
are
> > only 2 ways to change their values:
> >
> > 1. Programmatically: Some code in your app changes the value
> > 2. App restart: The heap is re-built from scratch, and the static
variables
> > are re-initialized to their beginning state.
> >
> > -- 
> > HTH,
> > Kevin Spencer
> > ..Net Developer
> > Microsoft MVP
> > Big things are made up
> > of lots of little things.
> >
> > "Simone Chiaretta" <SimoneChiaretta@discussions.microsoft.com> wrote in
> > message news:4544B8F9-85F3-4644-B8B3-BA3F5E63E78B@microsoft.com...
> > > I don't think this is the problem, because when the problem happens
what I
> > do to stop it and restore the original working is "recycling" the App
Pool
> > (or making a small change to the web.config when I don't have access to
the
> > server).
> > >
> > > Simone
> > >
> > > "Kevin Spencer" wrote:
> > >
> > > > This will happen if the app is recycled or re-booted.
> > > >
> > > > -- 
> > > > HTH,
> > > > Kevin Spencer
> > > > ..Net Developer
> > > > Microsoft MVP
> > > > Big things are made up
> > > > of lots of little things.
> > > >
> > > > "Simone Chiaretta" <SimoneChiaretta@discussions.microsoft.com> wrote
in
> > > > message news:E507B885-18F1-4B3F-A7A9-B0C4252CE035@microsoft.com...
> > > > > I've a very strange behaveour related to a website we built:
> > > > > from times to times, something should happen on the server, and
all
> > static
> > > > variables inside the web application, both defined inside aspx
> > code-behind
> > > > and in business logic (C# classes used by the aspx) lose their
value.
> > > > >
> > > > > I cannot reproduce this on our development server, so I cannot
> > understand
> > > > what the cause of all this is.
> > > > >
> > > > > We are using asp.net 1.1 with IIS6 on win2003.
> > > > >
> > > >
> > > >
> > > >
> >
> >
> >

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  • Re: Static variables "lose" value
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