TreeView.OnTreeNodeCheckChanged(TreeNodeEventArgs) Method

Definition

Raises the TreeNodeCheckChanged event of the TreeView control.

protected virtual void OnTreeNodeCheckChanged (System.Web.UI.WebControls.TreeNodeEventArgs e);

Parameters

e
TreeNodeEventArgs

A TreeNodeEventArgs that contains event data.

Remarks

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

Applies to

Produk Versi
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

See also