'宣言 Public Class DataTreeNode Inherits NavItem Implements Infragistics.Web.UI.IClientState, Infragistics.Web.UI.ICollectionObject, Infragistics.Web.UI.IDataObject, Infragistics.Web.UI.IHierarchicalDataObject, Infragistics.Web.UI.IObjectBase, Infragistics.Web.UI.ITemplatedObject, Infragistics.Web.UI.IUIObject