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

[ruivilanova]

what about to use function GetScale() instead of Refresh() in setInterval?
Refresh can cancel user's navigation over the map. 

Better than that would be to do a refresh (or a GetScale() ) only if the map
was inactive at more than 5minutes.



Kenneth, GEOGRAF A/S wrote:
> 
> 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 if( sessionId is no longer valid)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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