Hi,
The reason it fires twice could be because you're explicitly calling Update, but you're also adding the layer to the Map, which you may find initiates a 2nd query and a subsequent UpdateCompleted event (i.e. the second one you're seeing).
Note that another option for you might be to put the FeatureLayer in SelectionOnly mode in the Map and add the DynamicLayer equivalent for display.
Cheers
Mike
Hi,
When creating feature services (local or online) there's always a map service with the same content. Therefore - on the LocalFeatureService class there are UrlMapService and UrlFeatureService properties. You can create an ArcGISLocalDynamicMapServiceLayer using the UrlMapService property and an ArcGISLocalFeatureLayer using the UrlFeatureService property.
Cheers
Mike