topic Re: Get Layer Name in ArcGIS JavaScript Maps SDK Questions

Get Layer Name

ChrisSergent — Wed, 12 Dec 2012 13:18:46 GMT

I am attempting to display the name of a layer in an alert box. I have attached the .NET project. Here is the JavaScript code that I am using with a comment above the line where I am attempting to get the name of the layer. Any ideas what I need to do? :
<script type="text/javascript">
        dojo.require("esri.map");
        dojo.require("esri.layers.agstiled"); // cached map service.


        var map;

        function init() {
            map = new esri.Map("mapDiv");

            dojo.connect(window, 'resize', map, map.resize);

            var baseMapURL = "http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer";
            var basemap = new esri.layers.ArcGISTiledMapServiceLayer(baseMapURL);

            map.addLayer(basemap);
            // I want this alert to display the layer name which should be Topographic Info.
            alert(basemap.layerInfos[0].name);

        }
        dojo.addOnLoad(init);


    </script>

Thanks.

Chris S.

Re: Get Layer Name

ReneRubalcava — Wed, 12 Dec 2012 20:44:15 GMT

You'll want to listen to the 'onLayerAdd' event when adding individual layers.
http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi/map.htm#onLayerAdd

So something like

dojo.connect(map, 'onLayerAdd', function(){   alert(basemap.layerInfos[0].name); });  map.addLayer(basemap);

Right now you're trying to access the layerInfos immediately after adding it to the map, but you have to wait for it to finish loading before you can interact with it.

You might even be able to listen to the individual layers onLoad, but I haven't tried that way.
http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi/layer.htm#onLoad

Re: Get Layer Name

ChrisSergent — Sat, 11 Dec 2021 17:38:05 GMT

This worked perfect. Thanks Rene.

You'll want to listen to the 'onLayerAdd' event when adding individual layers.
http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi/map.htm#onLayerAdd

So something like
dojo.connect(map, 'onLayerAdd', function(){
  alert(basemap.layerInfos[0].name);
});

map.addLayer(basemap);
Right now you're trying to access the layerInfos immediately after adding it to the map, but you have to wait for it to finish loading before you can interact with it.

You might even be able to listen to the individual layers onLoad, but I haven't tried that way.
http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi/layer.htm#onLoad