fullExtent of featureLayer created from featureCollection

[LukePhilips]

Hey,
I'm trying to get the fullExtent of a featureLayer that when first created is based on a featureCollection. As I use the featureLayer I'll be editing it, adding/removing points based on other service queries. Every time I add data I want to zoom the map to the extent of the points on the map, which I would expect to be the featureLayer.fullExtent values. However, this extent value it typically undefined. Here is an example:
http://help.arcgis.com/en/webapi/javascript/arcgis/jssamples/#sample/fl_featurecollection

[StephenLead]

Hi Luke,

I'm not sure whether there's a method or property to return this directly.

If not, you could iterate through the geometries in your feature collection and union the extents cumulatively. The end result would be the combined extent of all features.

Steve

[DianaBenedict · Accepted solution]

The esri namespace methods provides a utility that will return the extent of a graphic array

http://help.arcgis.com/en/webapi/javascript/arcgis/jsapi/#namespace_esri/esri.graphicsExtent

esri.graphicsExtent(graphics)

Maybe this can help you.  I use it to zoom to selected features/grpahics on a map.

[LukePhilips]

Thanks for both of your answers, using the graphicsExtent gets exactly what I need. I was thinking the featureLayer.fullExtent property http://help.arcgis.com/en/webapi/javascript/arcgis/jsapi/#FeatureLayer/fullExtent would have done that, but I guess not.
Thanks.