TreeView::TreeNodeExpanded Event

 

Occurs when a node is expanded in the TreeView control.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
event TreeNodeEventHandler^ TreeNodeExpanded {
	void add(TreeNodeEventHandler^ value);
	void remove(TreeNodeEventHandler^ value);
}

The TreeNodeExpanded event is raised when a node is expanded in the TreeView control. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.

System_CAPS_noteNote

If the SelectAction property for a node is set to TreeNodeSelectAction.Expand or TreeNodeSelectAction.SelectExpand, the TreeNodeExpanded event is also raised when that node is clicked in the TreeView control.

For more information about handling events, see NIB: Consuming Events.

The following code example demonstrates how to use the TreeNodeExpanded event to update the content of a Label control when the user expands a node in the TreeView control.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 2.0
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