如果您不发回页，或者总是针对每个请求重新生成页上的控件，则应该在页级别禁用视图状态。
If you are not doing postbacks in a page or are always regenerating the controls on a page on each request, you should disable view state at the page level.
这是十分基本的。这仅仅判断ISBN编号的值是否为空的，同时在导航栏上禁用除删除控件外的所有其它控件-如果ISBN编号不为空的话，启用全部控件。
Basically, this just determines whether or not the ISBN value is empty, and disables all of the viewer controls except Delete if so - otherwise, it enables them all.
Swing控件现在可以提供听觉反馈来对特定事件作出响应，不过缺省情况下这项功能是禁用的。
Swing controls can now provide auditory feedback in response to specific events, though this functionality is disabled by default.
应用推荐