How to get feature info from wms layer

Question

I have used your code for picking feature info from WMS layer using WMSGetFeatureInfo function. I have used this link. http://underdark.wordpress.com/2011/03/17/picking-a-features-attribute-value-from-a-wms-layer-with-openlayers/ but I can't find the feature info.

feature.length function returns 0.

My WMS layer is:

 tiled = new OpenLayers.Layer.WMS( 
 "unit_project2_ws:unit_project3_view - Tiled", 
 "http://localhost:8080/geoserver/unit_project2_ws/wms",
 {
 LAYERS: 'unit_project2_ws:unit_project3',
 transparent: true,
 STYLES: '',
 format: format,
 tiled: true,
 tilesOrigin : map.maxExtent.left + ',' + map.maxExtent.bottom
 },
 {
 buffer: 0,
 displayOutsideMaxExtent: true,
 isBaseLayer: false,
 yx : {'EPSG:900913' : false}
 } 
 );

........................

Code I have used for the GetFeatureInfo request for the WMS layer:

roadidPicker = new OpenLayers.Control.WMSGetFeatureInfo({
 url: 'http://localhost:8080/geoserver/unit_project2_ws/wms',>
 title: 'identify features on click',
 layers: [tiled],
 queryVisible: true
 });
roadidPicker.infoFormat = 'application/vnd.ogc.gml';
roadidPicker.events.register("getfeatureinfo", this, pickRoadid);
map.addControl(roadidPicker);
roadidPicker.activate();
function pickRoadid(e) {
 if (e.features && e.features.length) {
 var val = e.features[0].attributes.id;
 alert(val);
 //document.getElementById('roadId').value = val;
 }
 else
 alert(e.features.length); // this function returns 0 result.
}

What is problem with this code.

• user14362: Can u please provide the working code...

Answer 1

I would get rid of those html
tags in your code. I really do not know if that is your problem but I have never seen that.

• Aftab Ahamad: oh,sory,tags have been removed now,that was my negligency,Problem is code else than html tags,Now check the code and answer me.
• Ralph Dell: I dropped the WMSGetFeatureInfo code and the pickRoadid function into a map and they worked for me on a wms layer. I had a featurelength. What happens when you change your url to localhost:8080/geoserver/wms'?