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V25.1
  • TreeViewControl.NodeExpanding Event

    Occurs before a node is expanded.

    Namespace: DevExpress.Xpf.Grid

    Assembly: DevExpress.Xpf.Grid.v25.1.dll

    NuGet Package: DevExpress.Wpf.Grid.Core

    Declaration

    public event TreeViewNodeAllowEventHandler NodeExpanding

    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