Is there an event in ArcObjects to determine when a layer (specifically a shapefile) has been loaded into a map?
I'm using ArcObjects 10.4.1 and C#
The event handler for capturing layers added to the map is IActiveViewEvents.ItemAdded
Make sure its pointing to a Map and not PageLayout.
You would then test to see if it is specifically a shapefile.
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The object of capturing this event is to rebuild feature cache. My code is now capturing properly both ItemDeleted and ItemAdded events. Now with the later, i'm losing feature cache even though I'm calling the same method for both events. Is there another event handler being called after ItemAdded that might be forcing to lose feature cache again? – Jose Jul 3 '19 at 9:09
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In the remarks section of the link you supplied it explicitly states caches are not supported for shapefiles, may be that is your issue? – Hornbydd Jul 3 '19 at 9:41
Here is some boiler plate code to set up active view events. You'll just need to write a function that checks if the item added is a shapefile. Call that function from Events_ItemAdded().
public static IActiveViewEvents_Event ActiveViewEvent;
private void WireDocumentEvents()
{
// Event handlers
ArcMap.Events.CloseDocument += new ESRI.ArcGIS.ArcMapUI.IDocumentEvents_CloseDocumentEventHandler(Events_CloseDocument);
if (ActiveViewEvent == null)
ActiveViewEvent = ArcMap.Document.FocusMap as IActiveViewEvents_Event;
if (ActiveViewEvent == null) return;
ActiveViewEvent.ItemAdded += Events_ItemAdded;
ActiveViewEvent.ItemDeleted += Events_ItemRemoved;
}
private void UnWireDocumentEvents()
{
// Unload Event handlers
ArcMap.Events.CloseDocument -= new ESRI.ArcGIS.ArcMapUI.IDocumentEvents_CloseDocumentEventHandler(Events_CloseDocument);
if (ActiveViewEvent == null) return;
ActiveViewEvent.ItemAdded -= Events_ItemAdded;
ActiveViewEvent.ItemDeleted -= Events_ItemRemoved;
ActiveViewEvent = null;
}
void Events_CloseDocument()
{
//DO SOMETHING WHEN DOCUMENT CLOSES
}
private void Events_ItemAdded(object item)
{
//DO SOMETHING WHEN ITEM ADDED
}
private void Events_ItemRemoved(object item)
{
//DO SOMETHING WHEN ITEM REMOVED
}
