TreeViewControl.CanUnselectNode Event
Occurs when a user tries to unselect a node and allows you to control whether a user can unselect a particular node.
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v24.1.dll
NuGet Package: DevExpress.Wpf.Grid.Core
Declaration
Event Data
The CanUnselectNode event's data class is DevExpress.Xpf.Grid.TreeList.CanUnselectNodeEventArgs.
Remarks
Set the TreeViewControl.SelectionMode property to the Cell/Row/MultipleRow value to use the CanUnselectNode event.
The following code sample does not allow users to unselect root nodes.
<dxg:TreeViewControl x:Name="treeview"
CanUnselectNode="treeview_CanUnselectNode"
SelectionMode="Row"/>
void treeview_CanUnselectNode(object sender, DevExpress.Xpf.Grid.TreeList.CanUnselectNodeEventArgs e) {
e.CanUnselectNode = e.Node.Level != 0;
}
Handle the CanSelectNode event to control whether a user can select a particular node.
See Also