关于RadPanelbar的DataFieldID和DataFieldParentID在DataSource为IQueryable <T>时的设置问题

Question

在往RadMenu树型菜单， 有个DataFieldParentID和DataFieldID的设置不管用了。RadMenu不能正常接收父子关系的设定并生成层级树菜单了 以前那里是写字段名的，现在是这样写么？ 应该怎么写呢？ 
                        <radP:RadPanelbar ID="RadMenu1" runat="server" Skin="Default" DataFieldID="ID" DataFieldParentID="MENU_FATHER"
                            Width="220px" OnItemDataBound="RadMenu_ItemDataBound" CausesValidation="False"
                            OnItemClick="RadMenu_ItemClick">
                        </radP:RadPanelbar>数据源是个自定义类MenuFuctionInfo        RadMenu.DataSource = auth.GetSystemMenuFunctionListByUserName(this.SessionUserName);//List<MenuFuctionInfo>
        RadMenu.DataBind();
问题来自于这个贴：http://topic.csdn.net/u/20090308/13/d59e93aa-81f9-4dfa-b24d-752e8774a24b.html

Answer 1

昨晚实在不行把数据写成XML格式了  父子关系倒是生成了，但是现实不正常，原来的分割线都没有了