Re: [OpenLayers-Users] Question on highlighting a feature using WFS

[Ryan Williams]

Maybe throw a
  hilites.redraw();
after
  hilites.setVisibility(true);

I haven't had to use it when I highlight features, but I have seen it 
used in some examples.

- Ryan

On 9/17/2010 10:47 AM, Ryan Williams wrote:
Try changing the VERSION from 1.1.0 to 1.0.0
worked for me.

 I also broke up the creation of the parser and the parsing, like:

    var gml_format = new OpenLayers.Format.GML();
    var features = gml_format.read(response.responseText);

But, it should work as-is.

Ryan


On 9/17/2010 10:03 AM, Planet)x wrote:
I am trying to follow this example
-http://trac.openlayers.org/wiki/Highlighting to highlight a feature 
using
WFS. I have both WFS/WMS setup with the same features. My code is the 
same
as the example and I tried to do the request manually by copying the 
code
being generated from the highlight method and it works (returns specific
information about the one feature I want to highlight). However when 
I run
the code it does not highlight my layer. Maybe I am confused I am 
displaying
the WMS layer in my map but I am doing the WFS request on the wfs 
layer is
it supposed to be different? Or should I just be calling this highlight
method from elsewhere? Thanks for advice, here is my code :



  // define a blank Vector layer and add it to the map
   var highlight_style = { fillColor:'#99CCFF', strokeColor:'#3399FF',
fillOpacity:0.7 };
   hilites = new OpenLayers.Layer.Vector("Highlighted",
                 {isBaseLayer:false, features:[], visibility:true,
style:highlight_style}
                 );
     map.addLayer(hilites);


   // define the WFS server which will fill requests
   var wfs_url        =
'http://localhost/RedWFS/Request.aspx?&SERVICE=WFS&request=GetFeature&VERSION=1.1.0'; 

   /* highlightFeatures() makes the WFS request, then highlight_them()
callback does the real work
    * Args for WFS filter: typename, attribute, value
    */

   function highlightFeatures(typename,attribute,value)
   {
    var wfsurl = wfs_url + '&typename=' + typename + 
'&filter=<ogc:Filter
xmlns:ogc="http://www.opengis.net/ogc";
xmlns:gml="http://www.opengis.net/gml";'
    + '
xmlns:gmgml="http://www.intergraph.com/geomedia/gml";><ogc:PropertyIsEqualTo><ogc:PropertyName>' 

+attribute+'</ogc:PropertyName><ogc:Literal>'+value+'</ogc:Literal></ogc:PropertyIsEqualTo></ogc:Filter>'; 

    OpenLayers.loadURL(wfsurl,'',null,highlight_them);
    alert(wfsurl);
   }

   function highlight_them(response)
   {
                           // use the GML parser to turn the XML into 
a list
of Feature objects
                           var features = new
OpenLayers.Format.GML().read(response.responseText);
                           // have the Vector layer purge its feature 
list,
replace them with the new ones
                           hilites.destroyFeatures();
                           hilites.addFeatures(features);
                           hilites.setVisibility(true);

    }


  highlightFeatures('WWW_PARCELS','Orig_addrkey','REICHLEY ST 43');


--
Ryan Williams, GISP
GIS Analyst / Programmer
PAQ Interactive Inc.
Monticello, IL
www.paqinteractive.com

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