本文向烈推荐给所以想要或正在进行Web开发的朋友们，只有了解了页面执行的过程，才能使你的设计开发更上一步，如鱼得水。同时也建议关注一下IIS管道及ASP.NET管道(HttpModule, HttpHandle等)。
Pag Life Cycle
PreInit
l All controls created and initialized with default value.
l Occurs: only for page class. UserControls, MasterPages do not have the method to override.
Note:
1. PreInit() is the only event set Themes programmatically.
2. Controls initialized after Init().
OnInit
l Can read properties set at design time.
Note:
1. After LoadPostData(), we can access the values changed by user.
LoadViewState
l Fired if the page has posted back (IsPostBack == true)
LoadPostBackData
l Fired if the page has posted back.
l In this event, the controls which implement IpostBackDataHandle interface gets loaded by the values from Http Post Data.
Note:
1. Http PostData has only a value pre control.
Page_Load
U know most
Control Event Handles
l Like button click event
Note:
1. Page_Load will fire first before any event handle.
PreRender
l Recursively fire for each child controls in this page.
Note:
1. Last event we can make any changes to control values.
SaveViewState
l ViewState of the controls got saved in the form’s hidden control.
Render
l All control are rendered recursively.
Unload
l Perform clear up operations.
Additional
1. ProcessPostData
l Cause the viewstate to catch up
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