OnTreeNodeCheckChanged Method

TreeView.OnTreeNodeCheckChanged Method (TreeNodeEventArgs)


Raises the TreeNodeCheckChanged event of the TreeView control.

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

protected virtual void OnTreeNodeCheckChanged(
	TreeNodeEventArgs e


Type: System.Web.UI.WebControls.TreeNodeEventArgs

A TreeNodeEventArgs that contains event data.

The TreeNodeCheckChanged event is raised when a check box in the TreeView control changes state between posts to the server. This allows you to provide an event-handling method that performs a custom routine, such as updating a database or the displayed content, whenever this event occurs.

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

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

.NET Framework
Available since 2.0
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