[OpenLayers-Users] filter for WMS layer like Vector layer?

[Ivan Grcic]

Hi Charles,

although wms specs doesnt have filter included, geoserver does support
filtering:
http://docs.geoserver.org/latest/en/user/services/wms/vendor.html#filter

You just have to write out the filter object, like in this example:
http://openlayers.org/dev/examples/filter.html
...
var filter_1_1 = new OpenLayers.Format.Filter({version: "1.1.0"});
var xml = new OpenLayers.Format.XML();
...

var allStreets = new OpenLayers.Layer.WMS(
             "All streets", "/geoserver/wms",
                {
                     ...
                     filter : xml.write(filter_1_0.write(filter)),
                     ...
...

Hope it helps,

Regards,
Ivan



On Thu, Jul 21, 2011 at 5:49 PM, Charles Galpin <cgalpin at lhsw.com> wrote:
> I would like to filter a WMS layer served by geoserver but I can't seem to get the filter to work.
>
> For a vector layer I can use the following just fine:
> var layer = new OpenLayers.Layer.Vector("vector layer", {
>  ...
>                filter: new OpenLayers.Filter.Comparison({
>                    type: OpenLayers.Filter.Comparison.EQUAL_TO,
>                    property: "prop",
>                    value: "value"
>                })
> });
> I have tried using this same filter in the params and options blocks of a WMS layer. It appears to be ignored in the options, but is not converted to a filter in cql or something in the wms request and shows up as [object Object]
> var allStreets = new OpenLayers.Layer.WMS(
>                "All streets", "/geoserver/wms",
>                {
>                    filter:
>                },
>                {
>                ..
>                }
>            );
> thanks,
> charles
>
> _______________________________________________
> Users mailing list
> Users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>



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Ivan Grcic
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Software Engineer


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