topic Code Samples in ArcGIS API for Silverlight Questions

Code Samples

CraigPerreault — Wed, 21 Jul 2010 18:49:16 GMT

When a user clicks on a graphic in this sample, how do I know what they clicked on? I was trying the MouseLeftButtonDown event?

http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#SDSMap

Re: Code Samples

dotMorten_esri — Wed, 21 Jul 2010 19:01:39 GMT

The graphic they clicked on is in the event argument (e.Graphic). Note that if you click on a cluster, you get the cluster that represents the clustered graphics. This is by design.

Re: Code Samples

CraigPerreault — Wed, 21 Jul 2010 19:25:09 GMT

If they click on a node of a cluster can you get the attributes?

Re: Code Samples

JenniferNery — Thu, 22 Jul 2010 16:20:55 GMT

If you add a MouseLeftButtonDown event on the GraphicsLayer with clusterer, e.Graphic is your node that represents the cluster and you can view its attributes (Count, Size, Color).

Jennifer

Re: Code Samples

CraigPerreault — Fri, 23 Jul 2010 12:35:22 GMT

Is there a way to get the FID(s) of the features in the cluster?

Re: Code Samples

JenniferNery — Fri, 23 Jul 2010 15:05:45 GMT

Sure, in the same MouseLeftButtonDown event handler, you can do the following:

GraphicsLayer l = sender as GraphicsLayer;
IEnumerable<Graphic> graphics = l.FindGraphicsInHostCoordinates(e.GetPosition(null));

This gives you an enumerable of graphics contained in that cluster.

Jennifer

Re: Code Samples

CraigPerreault — Fri, 23 Jul 2010 16:34:50 GMT

Brilliant! Thanks!!!
I can loop through the graphics and see the values but can I determine which one was clicked?