topic onLayersAddResult not firing in ArcGIS JavaScript Maps SDK Questions

onLayersAddResult not firing

JimWharton — Wed, 15 Aug 2012 23:10:46 GMT

I have connected an onLayersAddResult event to my map using dojo connect.

You can see an example at http://jsfiddle.net/xfJL6/

Even though I'm adding 3 layers, the event never fires. Is it because I'm using ArcGISDynamicMapServiceLayer?

Is there anyway to enumerate the info from the last layer I load? I'd like to use it to create a TOC and a Legend.

Re: onLayersAddResult not firing

JohnGravois — Thu, 16 Aug 2012 00:02:06 GMT

You have to use the method http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi/map.htm#addLayers'>addLayers() in order to take advantage of the event "onLayersAddResult".

You can do this by supplying them in an array instead of one at a time

map.addLayers([baseLayer, parcelLayer, serviceLayer]);

Also, make sure to check out our legend widget

Re: onLayersAddResult not firing

JimWharton — Thu, 16 Aug 2012 00:10:41 GMT

Brilliant! That makes no sense why addLayer() wouldn't fire the same callback... but I haven't written my own framework so I can't judge.

I'll check out your legend, thanks!

-Jim

Re: onLayersAddResult not firing

JohnGravois — Thu, 16 Aug 2012 16:13:36 GMT

I have to disagree with you there.

onLayerAddResult is fired when you load a single layer (using map.addLayer()).
onLayersAddResult is fired once when you load multiple layers simultaneously, while onLayerAddResult is also fired for each individual layer.

this gives you the best of both worlds 🙂

Check out the doc for more info.

Class:Map
http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi/map.htm

Re: onLayersAddResult not firing

JimWharton — Thu, 16 Aug 2012 16:27:02 GMT

I did not realize there was an event handler called onLayerAddResult. In skimming many of the examples, I don't think I saw it. Or I did see it, and skimmed right over it.

Thank you again for clueing me in.