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TreeListView.ShowingNodeFooter Event

Fires for each parent node before showing its node footer.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v23.1.dll

NuGet Package: DevExpress.Wpf.Grid.Core


public event TreeListShowingNodeFooterEventHandler ShowingNodeFooter

Event Data

The ShowingNodeFooter event's data class is TreeListShowingNodeFooterEventArgs. The following properties provide information specific to this event:

Property Description
Allow Gets or sets whether the operation is allowed. Inherited from TreeListNodeAllowEventArgs.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
IsRootNode Gets whether the processed node is a root node.
Node Gets the processed node. Inherited from TreeListNodeEventArgs.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Row Gets the processed row. Inherited from TreeListNodeEventArgs.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.

The event data class exposes the following methods:

Method Description
InvokeEventHandler(Delegate, Object) When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.


Handle this event to prevent the TreeListView from displaying any node footers.

The code sample below demonstrates how to prevent showing node footers for those nodes that have a single child.

private void OnShowingNodeFooter(object sender, DevExpress.Xpf.Grid.TreeList.TreeListShowingNodeFooterEventArgs e) {
    if(e.IsRootNode || e.Node.Nodes.Count(node => node.IsVisible) == 1)
        e.Allow = false;
See Also