wpf-devexpress-dot-xpf-dot-grid-dot-treelistview-f5692025.md
Occurs after a node has been expanded.
Namespace : DevExpress.Xpf.Grid
Assembly : DevExpress.Xpf.Grid.v25.2.dll
NuGet Package : DevExpress.Wpf.Grid.Core
public event TreeListNodeEventHandler NodeExpanded
Public Event NodeExpanded As TreeListNodeEventHandler
The NodeExpanded 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. |
Refer to the following help topic for more information: Expand and Collapse Nodes.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the NodeExpanded 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.
var tree = (this.AssociatedObject.View as TreeListView);
tree.NodeExpanded += GridNodeChanged;
tree.NodeCollapsed += GridNodeChanged;
Dim tree = (TryCast(Me.AssociatedObject.View, TreeListView))
AddHandler tree.NodeExpanded, AddressOf GridNodeChanged
AddHandler tree.NodeCollapsed, AddressOf GridNodeChanged
See Also