生命周期 Pag Life Cycle

注：刚从硬盘里发现的，忘了从哪里整理出来的。有知道的兄弟帮忙添加个引用。

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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