System.Web.UI.WebControls.TreeView.OnTreeNodeExpanded Method

Raises the TreeView.TreeNodeExpanded event of the System.Web.UI.WebControls.TreeView control.

Syntax

protected virtual void OnTreeNodeExpanded (TreeNodeEventArgs e)

Parameters

e
A System.Web.UI.WebControls.TreeNodeEventArgs that contains event data.

Remarks

The TreeView.TreeNodeExpanded event is raised when a node is expanded in the System.Web.UI.WebControls.TreeView control. This allows you to provide an event-handling method that performs a custom routine whenever this event occurs.

Note:

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

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

The TreeView.OnTreeNodeExpanded(TreeNodeEventArgs) 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.

Requirements

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0