[OpenLayers-Users] Adding an attribute field to a vector layer

[Robert Sanson]

Thanks to Arnd and Dane, this is what works:
 
I first create the layer:
 
function cropsreturn(cropsresponse) {
              crop_style.strokeColor = "#ff0000";
              if (cropsresponse.responseText.indexOf('Error') != -1) {
                window.alert("no crops");
                crops = new OpenLayers.Layer.Vector("Crop areas",
                  {isBaseLayer: false,
                   style: crop_style, 
                   extractAttributes: true });
                 map.addLayer(crops);
                 map.zoomToMaxExtent();
              }
              else {
                crops = new OpenLayers.Layer.Vector("Crop areas",
                  {isBaseLayer: false,
                   style: crop_style, 
                   extractAttributes: true }); 
                   crops.addFeatures(geojson_format.read(cropsresponse.responseText));
                 map.addLayer(crops);
                 map.zoomToExtent(crops.getDataExtent());
              }
}
 
//later:
crops.onFeatureInsert = function(feature) {
                feature.attributes.prop0 = 'new'; //This should be modified to get actual primary key
                window.alert("New crop area inserted");
 }
 
Robert

>>> "Arnd Wippermann" <arnd.wippermann at web.de> 16/10/2008 6:44 a.m. >>>
Hi Robert,
perhaps this is a way
register 'featureadded' for the vector layer
     *  - *featureadded* Triggered after a feature is added.  The event
     *      object passed to listeners will have a *feature* property with a
     *      reference to the added feature.
crop_layer.events.register('featureadded', crop_layer, regFeatureAdded);
function regFeatureAdded()
{
    this.attributes['name'] = 'name';
    this.attributes['description'] = 'description';
}
 
but I have it not tested.
Arnd Wippermann

Von: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] Im Auftrag von Robert Sanson
Gesendet: Mittwoch, 15. Oktober 2008 05:46
An: users at openlayers.org 
Betreff: [OpenLayers-Users] Adding an attribute field to a vector layer

I am developing an application that allows a user to digitise crop areas. The areas created will then be uploaded to a SQL-server database via a geoJSON string sent to a ColdFusion service.
 
How can I specify one or more attribute fields?
 
I am using the following construct:
 
var crop_layer = new OpenLayers.Layer.Vector(); 
map.addLayer(crop_layer);
 
Many thanks,
 
Robert Sanson




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