I've created a work around for this issue, I simply reset the value of the IdentifyLayerIds collection when the layer visibility changes. As the Identify behavior only returns results from visible layers, it does require that the web services have all of their sub-layers turned on by default in order work properly. Layer/Sub-layer visibility should to be set in the viewer configuration.
using System;
using System.ComponentModel.Composition;
using System.Windows.Interactivity;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Extensibility;
namespace IndentifyFix.AddIns
{
[Export(typeof(Behavior<Map>))]
[DisplayName("IdentifyFix")]
[ESRI.ArcGIS.Client.Extensibility.Category("TEP Tools")]
[ESRI.ArcGIS.Client.Extensibility.Description("Fix the identify tool so that it only hits the visible layers")]
public class IdentifyVisible : Behavior<Map>
{
#region Behavior Overrides
protected override void OnAttached()
{
base.OnAttached();
MapApplication.Current.Initialized += new EventHandler(Current_Initialized);
MapApplication.Current.Map.Layers.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Layers_CollectionChanged);
}
#endregion
void Current_Initialized(object sender, EventArgs e)
{
AddEventHandlers();
MapApplication.Current.Initialized -= new EventHandler(Current_Initialized);
}
private void AddEventHandlers()
{
foreach (Layer layer in MapApplication.Current.Map.Layers)
{
if ((layer as ArcGISDynamicMapServiceLayer) != null)
{
ArcGISDynamicMapServiceLayer agsDynamicLayer = (layer as ArcGISDynamicMapServiceLayer);
agsDynamicLayer.VisibilityChanged += new EventHandler<EventArgs>(ArcGISDynamicMapServiceLayer_VisibilityChanged);
UpdateIndentify(agsDynamicLayer);
}
}
}
private void Layers_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add)
{
foreach (var item in e.NewItems)
{
if (item is ArcGISDynamicMapServiceLayer)
{
ArcGISDynamicMapServiceLayer agsDynamicLayer = (item as ArcGISDynamicMapServiceLayer);
agsDynamicLayer.VisibilityChanged += new EventHandler<EventArgs>(ArcGISDynamicMapServiceLayer_VisibilityChanged);
UpdateIndentify(agsDynamicLayer);
agsDynamicLayer.VisibilityChanged += new EventHandler<EventArgs>(ArcGISDynamicMapServiceLayer_VisibilityChanged);
}
}
}
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
foreach (var item in e.OldItems)
{
if (item is ArcGISDynamicMapServiceLayer)
{
(item as ArcGISDynamicMapServiceLayer).VisibilityChanged -= new EventHandler<EventArgs>(ArcGISDynamicMapServiceLayer_VisibilityChanged);
}
}
}
}
void ArcGISDynamicMapServiceLayer_VisibilityChanged(object sender, EventArgs e)
{
ArcGISDynamicMapServiceLayer agsDynamicLayer = sender as ArcGISDynamicMapServiceLayer;
UpdateIndentify(agsDynamicLayer);
}
private static void UpdateIndentify(ArcGISDynamicMapServiceLayer agsDynamicLayer)
{
if (agsDynamicLayer != null)
{
System.Collections.ObjectModel.Collection<int> visibleLayers = new System.Collections.ObjectModel.Collection<int>();
if (agsDynamicLayer.VisibleLayers != null)
{
foreach (var i in agsDynamicLayer.VisibleLayers)
{
visibleLayers.Add(i);
}
}
else
{
foreach (var li in agsDynamicLayer.Layers)
{
if (li.DefaultVisibility == true)
visibleLayers.Add(li.ID);
}
}
ESRI.ArcGIS.Mapping.Core.LayerExtensions.SetIdentifyLayerIds(agsDynamicLayer as Layer, visibleLayers);
}
}
}
}
ps You will need to add a reference to ESRI.ArcGIS.Mapping.Core which can be found in Viewer.xap Thanks,Jeff
