boardn.木板；布告板；董事会；船舷或机舱；伙食；舞台v.登(飞机、车、船等)；接受乘客；有偿提供食宿；搭伙；用木板覆盖boardingadj.供膳宿的n.木材；登船

1. Control that the state of the control has changed.
   控件发出控件状态已更改的信息。
2. Loads control state data that was saved from a previous page request, and needs to be restored on a subsequent request.
   加载从前一个页请求保存并需要在后续请求上还原的控件状态数据。