[mapguide-users] How to check if session is expired?

[Kenneth, GEOGRAF A/S]

I don't think so, because the map's current layout, zoom, properties, 
etc ..., is stored in the session, so creating a new session, would 
reset all those properties, giving the initial map.

What you can do, is run a javascript timer that polls a page, that 
performs a keep-alive of the session, as long a the browser is open.
A simple way, to achieve this is to call Map.refresh every 5 minutes:

window.setInterval('document.GetMapFrame().Refresh();', 50000);

This approach might refresh the map at times when it is not wanted (but 
should be harmless).
A more sophisticated way would be through an AJAX call that performs the 
session access (and thus refresh) on the server.

Also, I believe there is a way to set the session length, so that you 
may increase it.

Kenneth, GEOGRAF A/S



Jackie Ng skrev:
> Hi all,
>  
> Is there a way to check if a given MapGuide session ID has expired or 
> not? I am experiencing this annoying problem of the mapguide session 
> expiring after about 10 mins, forcing me to do a manual refresh of the 
> browser. Can I do something like this?
>  
> string sessionId = Request.QueryString["sessionID"];
> if( sessionId is no longer valid)
> {
>     sessionId = CreateSession();
>     ...
> }
>
> Regards,
>
> Jackie Ng
>
> AEC Spatial Pty Ltd. / AEC Systems Pty Ltd.
> SYDNEY - MELBOURNE - BRISBANE - PERTH - ADELAIDE - HOBART
>
> A.B.N: 32 075 809 451
>
> Level 4, 37-41 Prospect St. Box Hill, Victoria, 3128
>
> Phone: 1300 368 609
> Fax:    1300 362 140
>
> www.aecsystems.com.au
> jackie.ng at aecsystems.com.au <mailto:jackie.ng at aecsystems.com.au>
>
>  
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