topic FeatureLayer Default Symbology/Renderer in ArcGIS API for Silverlight Questions

FeatureLayer Default Symbology/Renderer

TonyThatcher — Fri, 29 Apr 2011 19:34:38 GMT

Hopefully somebody can shed some light on this issue.

We have a map service that has a bit of custom defined symbology (e.g. Roads of different classes get displayed or labeled in certain ways). When I add this service to my Silverlight Map as an ArcGISDynamicMapServiceLayer, the symbology comes through perfectly. From other posts it appears that this is the default renderer for the layer (I can override it if I want by defining my on renderer in the XAML). But for certain maps it makes sense to only show a subset of the layers, so I am loading these individual layers as Feature Layers. When I do this, the default symbology disappears. I really do not want to define my symbology/renderers in XAML when it is already defined in the map service.

Am I missing something? Is this behavior by design. I can't find any discussion of it directly in the documentation, but an ESRI staffer seemed to indicate on another post that the only way to override the default renderer from the Map Service was to define my own. So this seems to indicate that the default renderer from the Map Service should be the same no matter if it is loaded along with all the other layers as a ArcGISDynamicMapServiceLayer or as a single layer using a FeatureLayer.

Ideas?

-Tony

Re: FeatureLayer Default Symbology/Renderer

DominiqueBroux — Sat, 30 Apr 2011 10:01:53 GMT

I am loading these individual layers as Feature Layers. When I do this, the default symbology disappears.

Which ArcGIS server version are you using?
The default feature layer symbology is a new functionality of ArcGIS server 10.0.
So if you are using a prior version this explains your issue.

Re: FeatureLayer Default Symbology/Renderer

TonyThatcher — Mon, 02 May 2011 15:09:15 GMT

Server 9.3, currently. So is there any way to use the Server-defined symbology using DataLayers? Or do I have to set the renderer for each data layer?

-Tony

Re: FeatureLayer Default Symbology/Renderer

DominiqueBroux — Tue, 03 May 2011 07:00:08 GMT

In 9.3 the server-defined symbology is not exposed by the REST API, so unfortunately you have to define it by yourself at the client side (or migrate to 10...)