[OpenLayers-Users] HELP!!! How implement Filter in WMS Layer

[Arnd Wippermann]

Hi Paul,
 
SLD_BODY is a request parameter of a wms. If you can get from your grid a
reference to your OpenLayers WMS layer, then you can use 
 
yourWMSlayer.mergeNewParams('SLD_BODY' : ....).
 
if your wms have only one layer (in the eample below POLYGONS) to request,
you can use something like this
 
<StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld"
xmlns:gml="http://www.opengis.net/gml"
xmlns:ogc="http://www.opengis.net/ogc"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/sld
http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
<NamedLayer>
<Name>COUNTRY</Name>
<UserStyle>
<FeatureTypeStyle>
<Rule>
<PolygonSymbolizer>
<Fill>
<CssParameter name="fill">#f0f0f0</CssParameter>
<CssParameter name="fill-opacity">1.00</CssParameter>
</Fill>
<Stroke>
<CssParameter name="stroke">#646464</CssParameter>
</Stroke>
</PolygonSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>
 
as SLD_BODY to highlight the the features of the layer. Attention! You have
to delete the line feeds for the request. 
 
Zooming to the extent of the wms layer is not so easy, perhaps inpossible.
You can request the WMS GetCapabilities and hope that there the correct
extent are described for the layer. Or if the layer is also requestable as
WFS you can perhaps on that way get the extent of the layer. But I'm not
sure.
 
If you are the holder of the WMS server, I would suggest, that you calculate
the extent on other ways and adds it as array to your application.
 
Arnd 
 
  _____  

Von: Paul james [mailto:pauljame at gmail.com] 
Gesendet: Montag, 3. Mai 2010 16:39
An: Arnd Wippermann
Cc: fsalas; users at openlayers.org
Betreff: Re: [OpenLayers-Users] HELP!!! How implement Filter in WMS Layer


Hi Arnd...
I have some questions about that...

First I have a geo app using Openlayers/Mapserver WMS with SDE layers....
My application has a treeview with all layers, and a radiobox for each
layer... When I click in a layer´s radiobox a window with a GRID containing
all layer´s data is opened...
In that GRID, When I select a line (layer´s data), the Map should :
 1-) Highlight it 
 2-) Zoom in data selected

Can I develope that using SLD and SLD_BODY ? Do you have any tip to how do
that?

Thanks 
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