解读System.Web.UI.Page中关键方法ProcessRequestMain()[转]
2023-09-14 08:59:42 时间
from:http://www.csharp.net.cn/post/62.html
为了更好地优化博客园程序的性能,最近我在优化代码的同时,更深入地去研究asp.net的源代码。asp.net的源代码通过Reflector工具一鉴无遗, 虽然不是原版的代码,但已经足够了,其中的原理与思想已经清楚地摆在我们面前。这是.NET开发人员的幸运!
在我们开发asp.net应用程序时, System.Web.UI.Page是我们最熟悉并用的最多的一个类。但有多少人真正对这个类的源代码仔细研究过? 从相关搜索中可以看出并不是很多,比如,用Google搜索ProcessRequestMain方法中开始的“OnPageStartSessionObjects”,结果只有四个。
今天我花了半天时间,研究了Page中处理请求的最关键的方法:ProcessRequestMain(),在这里我将自己的理解写出来与大家共享,欢迎大家批评并指正。一切尽在代码注释中:
注:为了方便阅读与理解,已去掉源代码中输出Trace信息的部分。
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//检查结束后,将其赋值给_controlsRequiringPostBack.那现在_controlsRequiringPostBack中剩下什么呢?没有实现IPostBackDataHandler,
//但实现了 IPostBackEventHandler的控件以及没有被Load的控件, 也就是在PostBack数据中存在但FindControl没有找到的控件。
//为什么会有找不到的控件呢?我们这里需要注意的是OnLoad()事件还没执行,
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