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TreeView.OnSelectedNodeChanged Method

Raises the SelectedNodeChanged event of the TreeView control.

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

protected virtual void OnSelectedNodeChanged(
	EventArgs e
)

Parameters

e
Type: System.EventArgs

An System.EventArgs that contains event data.

The SelectedNodeChanged event is raised when a node is selected in the TreeView control. This allows you to provide an event-handling method that performs a custom routine, such as updating the displayed content, whenever this event occurs.

You can optionally set the SelectAction property of a node to specify which event is raised when that node is selected.

NoteNote

The HoverNodeStyle is not rendered for a node with its SelectAction property set to TreeNodeSelectAction.None.

Raising an event invokes the event handler through a delegate. For more information, see Consuming Events.

The OnSelectedNodeChanged method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding the OnSelectedNodeChanged method in a derived class, be sure to call the OnSelectedNodeChanged method for the base class so that registered delegates receive the event.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
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