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

[Charles Galpin]

Thanks Ivan, that's just what I was looking for!  Works perfectly, as well as with mergeNewParams to have changes take effect dynamically.

charles

On Jul 21, 2011, at 12:37 PM, Ivan Grcic wrote:

> 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
>> 
> 
> 
> 
> -- 
> -------------------------------------------------------
> Ivan Grcic
> GeoSolutions S.A.S.
> Software Engineer
> 
> 
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