When FeatureLayer creating Graphics....

linusang

I would like to attach it's FeatureLayer Id to each Graphic's Symbol's Path using Attach Properties when the FeatureLayer creates it's Layer.. how do i do that?

AliMirzabeigi

1) Define an attached property in your class:

private static readonly DependencyProperty AssociatedLayerIDProperty =
   DependencyProperty.RegisterAttached("AssociatedLayerID", typeof(string), typeof(Graphic), null);

2) Use the following code snippet in CollectionChanged event of Graphics or UpdateCompleted event of your FeatureLayer:

FeatureLayer featureLayer = sender as FeatureLayer;
   foreach (Graphic graphic in featureLayer)
   {
    graphic.SetValue(AssociatedLayerIDProperty, featureLayer.ID);
   }

* You can retrieve these value later using the following code snippet:

string associatedField = (sender as FrameworkElement).GetValue(AssociatedLayerIDProperty) as string;