[Quote=引用 2 楼 namhyuk 的回复:]
In the save view state stage of the ASP.NET page life cycle, the Page class recursively iterates through the controls in its control hierarchy, invoking each control's SaveViewState() method.
ControlState is similar to ViewState but cannot be turned off.You need to override the
SaveControlState and LoadControlState methods to access ControlState.
It is not enabled by default and you must call the RegisterRequiresControlState method of the Page to enable it for a control.