Occurs after a group of items has been expanded.
public event ItemEventHandler GroupExpanded
The GroupExpanded event's data class is ItemEventArgs. The following properties provide information specific to this event:
The GroupExpanded event is raised after a group of data items is expanded from UI or code (ExpandGroup). This event serves as a notification and does not allow you to cancel the action. To prevent a group from being expanded, handle the GroupExpanding event and set its parameter's Allow property to false.
When you call the ExpandAllGroups method, the GroupExpanded event is raised for each group.