TreeView.OnSelectedNodeChanged(EventArgs) Method

Definition

Namespace:

System.Web.UI.WebControls

Assembly:

System.Web.dll

Raises the SelectedNodeChanged event of the TreeView control.

C#

protected virtual void OnSelectedNodeChanged(EventArgs e);

Parameters

e

EventArgs

An EventArgs that contains event data.

Remarks

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.

Note

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 about how to handle events, see Handling and Raising 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(EventArgs) method in a derived class, be sure to call the OnSelectedNodeChanged(EventArgs) method for the base class so that registered delegates receive the event.

Applies to

See also

• SelectedNodeChanged