有什么数据库专业书籍介绍？

 可疑，问题是发生了部分回发，其中只重新呈现了更新面板的内容。 
 
 也就是说，仍在调用所有服务器端页面生命周期事件。 这让我很困惑，因为我可以调试并看到正在应用但未在html中呈现的CssClass。 就像我猜的那样Asp.Net更新面板的工作方式。 

As suspected, the problem was that a partial postback was occurring in which only the contents of the update panel were being re-rendered.
 
That said, all the server side page lifecycle events were still being invoked. This is what confused me as I could debug and see the CssClass being applied but not being rendered in the html. Just the way Asp.Net update panels work I guess.