TreeListView.NodeCollapsed Event

Occurs after a node has been collapsed.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v24.1.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event TreeListNodeEventHandler NodeCollapsed

VB.NET

Public Event NodeCollapsed As TreeListNodeEventHandler

Event Data

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

Property	Description
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.
Node	Gets the processed node.
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.
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.

Remarks

To learn more, see Expanding and Collapsing Nodes .

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the NodeCollapsed event.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

how-to-emulate-binding-to-the-isexpanded-property-of-the-treelistnode-t127638/CS/DevExpress.Example04/BindableExpandingBehavior.cs#L49

    tree.NodeExpanded += GridNodeChanged;
    tree.NodeCollapsed += GridNodeChanged;
}

VB.NET

how-to-emulate-binding-to-the-isexpanded-property-of-the-treelistnode-t127638/VB/DevExpress.Example04/BindableExpandingBehavior.vb#L54

    AddHandler tree.NodeExpanded, AddressOf GridNodeChanged
    AddHandler tree.NodeCollapsed, AddressOf GridNodeChanged
End Sub