TreeViewControl.NodeExpanding Event
Occurs before a node is expanded.
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v24.1.dll
NuGet Package: DevExpress.Wpf.Grid.Core
Declaration
Event Data
The NodeExpanding event's data class is DevExpress.Xpf.Grid.TreeList.TreeViewNodeAllowEventArgs.
Remarks
This event occurs when a user tries to expand a node. You can handle this event to cancel the action. To do this, set the event parameter’s TreeListNodeAllowEventArgs.Allow property to false.
After a user expands a node, the TreeViewControl raises the NodeExpanded event.
See Also