TreeView::SelectedNodeChanged Event
Occurs when a node is selected in the TreeView control.
Assembly: System.Web (in System.Web.dll)
The SelectedNodeChanged event is raised when a node is selected in the TreeView control. This allows you to provide an event-handling method that performs a custom routine, such as updating the displayed content, whenever this event occurs.
You can optionally set the SelectAction property for a node to specify which event is raised when that node is selected. The following table lists the available options.
Selection action | Description |
|---|---|
Toggles the node between expanded and collapsed. Raises the TreeNodeExpanded or TreeNodeCollapsed event, as appropriate. | |
Raises no events when a node is selected. | |
Raises the SelectedNodeChanged event when a node is selected. | |
Raises both the SelectedNodeChanged and TreeNodeExpanded events when a node is selected. Nodes are only expanded, never collapsed. |
Note |
|---|
The HoverNodeStyle is not rendered for a node with its SelectAction property set to TreeNodeSelectAction.None. |
The SelectedNodeChanged event is fired only on post back when a user clicks a node. The event is not fired if the SelectedNode property is changed programmatically.
For more information about handling events, see NIB: Consuming Events.
Available since 2.0
