topic Re: Loop through features in FeatureLayer in ArcGIS JavaScript Maps SDK Questions

Loop through features in FeatureLayer

MarcBate — Thu, 10 Mar 2016 18:33:00 GMT

How do I loop through all the features in a FeatureLayer and get/set their attributes in v4 ?

Re: Loop through features in FeatureLayer

RobertScheitlin__GISP — Sat, 11 Dec 2021 22:59:33 GMT

Marc,

You can get the graphics from the layers view:

// Carbon storage of trees in Warren Wilson College.
        var featureLayer = new FeatureLayer({
          url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
        });


        featureLayer.on("layer-view-create", function(evt){
          //The LayerView for the layer that emitted this event
          console.info(evt.layerView);
        });

The layerView has a graphics property.

But be aware of this note in the docs:

In this version of the API, geometries and attributes of features in a FeatureLayer cannot be added, deleted, or edited.

Re: Loop through features in FeatureLayer

MarcBate — Tue, 15 Mar 2016 20:06:59 GMT

Thanks. That worked. I didn't see graphics as a property of LayerView in the beta 3 API reference

Re: Loop through features in FeatureLayer

RobertScheitlin__GISP — Tue, 15 Mar 2016 20:07:55 GMT

Marc,

The Docs are still incomplete and in Beta as well.

Re: Loop through features in FeatureLayer

MarcBate — Tue, 15 Mar 2016 20:08:54 GMT

var layerView = view.getLayerView(layer);
if (typeof layerView !== "undefined") {

layerView.graphics.forEach(function(graphic) {

//code here

});

}