Re[mapguide-users] freshing a map/layer... from server side, avoiding JavaScript

[Maksim Sestic]

Seems that turning to JavaScript is unavoidable at the moment :-) But it
would be nice to have this possibility of map/layer refreshing from the
server side, too. Here's why...

I created couple of web services (currently on SOAP) talking through my dll
on server side with MG libraries. Depending on complexity, certain calls may
take some time to perform. JavaScript executes on client, so it's out of
synch with server-side execution. Signalling between client and server is
sometimes hard to maintain, plus it involves extra HTML elements for
handling data between ASP.NET and JavaScript. And it doesn't save any calls.

Say, a developer utilizing my server-side library and ASP.NET templates has
a button that runs some time-consuming server-side operation. Operation
finishes and stores the result (e.g. SelectionXML) in a hidden element that
gets read by JavaScript after the page has been posted. Since postback calls
get trapped by Ajax.NET, there's a fat chance that my JavaScript will not
execute as planned. Etc.

Regards,
Maksim Sestic



Kenneth, GEOGRAF A/S wrote:
> 
> It sounds as if you want to do a "server push" rather than the more 
> common "client pull".
> I'm not sure that it is easily accomplished, but since the AJAX viewer 
> contains a lot of JS code, I don't see any problems in an extra refresh 
> call.
> 

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