Deletes the specified node.
DeleteNode(nodeKey: string): void
A string value that identifies the node.
Once the DeleteNode method is called, the server-side ASPxTreeList.NodeDeleting event is raised. It allows you to cancel the delete operation. After a node has been deleted, the ASPxTreeList.NodeDeleted event is raised.
End-users can delete nodes by clicking the Delete button. To learn more, see Adding and Deleting Nodes