[mapguide-users] Simple Query. How to.
Willem Schwarte
willem at giskit.nl
Mon Feb 12 09:45:47 EST 2007
You can create a layer in studio as how it should look, and save this as
a XML file (menu File).
Then you can load this XML as a new layer in your code and set the
FILTER (id=1 or whatever) add the layer to your map and refresh (or
not).
This is how I do this. There is an example on the example site on
osgeo.org.
Something like this:
// Change the filter
$xpath = new DOMXPath($domDocument);
$query = '//Filter';
// Get a list of all the <AreaRule><Filter> elements in
// the XML.
$nodes = $xpath->query($query);
// Find the correct node and change it , this is the filter
foreach ($nodes as $node )
{
$node->nodeValue = '"afz_nr" = '.$_GET['afznr'].'';
}
// Add the layer to the map
$layerDefinition = $domDocument->saveXML();
$newLayer = add_layer_definition_to_map($layerDefinition,
"newlayer", "Route", $sessionId, $resourceService, $map,0);
Willem
-----Oorspronkelijk bericht-----
Van: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] Namens MaciekS
Verzonden: maandag 12 februari 2007 15:33
Aan: mapguide-users at lists.osgeo.org
Onderwerp: [mapguide-users] Simple Query. How to.
Hi MapGuide developers.
Does somebody know how to filter data on specified, existing layer?
I added a layer from a SHP file to my repository using MapGuide Studio.
Now I'd like to filter this layer from my code with a simple query, for
example (where ID=1).
How should I built my code to execute the query that finally will
display in
the browser only polygons specified in the query?
Regards, Maciek
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