[mapguide-users] Layer visibility control

[irwan]

Thanks James, but unfortunately i'm still beginner in php sripting. Can you
tell me more where should i put that code?


James Card wrote:
> 
> On Mon, 05 Jan 2009 17:13:16 -0800, irwan <anakando at yahoo.com> wrote:
> 
>> Hi.. i have 1 layer, contain 10 buildings that are not joinned with
>> database. I need to know, how i can controlled the visibility of the
>> certain building based on the database query?? For example, i have bl_id
>> from A1 to A10. After query(database), i just want to show building from
>> A2 to A6. I know this can be done with joining building layer with
>> building table in database. But what i care most is performance. So it
>> would be nice if i can controlled the visiblity of these building within
>> the script or code.any idea or code sample?
> 
> I would run your database query and then use its results to modify the
> layer's Filter property. The code sample at
> <http://n2.nabble.com/Filtering-features-on-map-with-SelectFeatures-function-td1809656.html#a9818609>
> may help. Once you've modified the layer definition, you'll also need to
> update your map definition to use the new layer in the session repository,
> and then modify the layout definition to read your modified map
> definition. We do this in a couple of our maps and performance is good.
> 
> -- 
> James Card
> California CAD Solutions, Inc.
> 209-578-5580 - Voice
> 209-521-6493 - FAX
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> 
> 

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