TreeView.OnTreeNodeExpanded Method

Raises the TreeNodeExpanded event of the TreeView control.

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

protected:
virtual void OnTreeNodeExpanded (
	TreeNodeEventArgs^ e
)
protected void OnTreeNodeExpanded (
	TreeNodeEventArgs e
)
protected function OnTreeNodeExpanded (
	e : TreeNodeEventArgs
)
Not applicable.

Parameters

e

A TreeNodeEventArgs that contains event data.

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.

NoteNote:

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

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

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

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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