TreeView.OnTreeNodeExpanded Method
.NET Framework 3.0
Raises the TreeNodeExpanded event of the TreeView control.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Assembly: System.Web (in system.web.dll)
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.
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| 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.Community Additions
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