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TreeView.OnTreeNodeCheckChanged Method

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
)

Parameters

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 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

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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