Map Legend Selected Item Improvements

Question

Is it possible to get a more robust mechanism to extract the currently selected item from the Legend control?  I've been fighting with the Tree class as well as the "LayerItemViewModel" or "LegendItemViewModel" to extract out which layer from the collection of layers loaded into the Map Viewer control is currently selected.  I would like to determine the Layer Type (Dynamic Layer, Feature Layer, etc.) as well as the Layer ID.  This would enable me to set the various other controls like Identify control, Editor control, etc.

My biggest challenge is that I can't figure out a practical way to determine the "Parent Layer" of a Feature layer if that feature layer has styles assigned to it?  The LegendTree could potentially provide me a way to grab the Parent Layer ID using something like this "itm.LegendTree.LayerItems.Items(itm.LegendTree.LayerItemsMode)" but it's not an exposed item?

Any thoughts?

DominiqueBroux · Answer

Is there a way to programmatically set the selected layer?

If you are talking about selecting a layer in the legend control, you can do that by code by using the 'IsSelected' property of the LayerItemViewModel.
This sample : http://help.arcgis.com/en/webapi/sil...dWithTemplates demonstrates how to use the 'IsCollapsed' property but you can use the IsSelected property the same way (except than with the default template, the legend supports one selected item only).

Reynaldde_Castro · Answer

Is there a way to programmatically set the selected layer?  I want to check a particular checkbox depending on user selection.

DominiqueBroux · Answer

OK, I see the problem.
 
There is nothing exposed by the API that returns the parent item of a legend item.
 
You have to go through the legend tree with a program similar to that returning the selected item (or you can extend that program to return at the same time the selected item and the parent item).