ASP.net中頁面事件的先後執行順序
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客戶發出POST請求-〉建立Page衍生類別,調用建構函式-〉調用Page類的IHttpHandler.ProcessRequest方法-〉啟用Page類的Init事件-〉調用Page類的CreateChildControls虛方法-〉從POST變數和VIEWSTATE中還原伺服器端控制項狀態-〉啟用Page類的Load事件-〉啟用伺服器端控制項事件-〉啟用Page類的PreRender事件-〉調用Page類的Render虛方法-〉調用Page類的RenderChildren虛方法-〉發送HTTP響應給用戶端-〉啟用Page類的Unload事件-〉丟棄Page衍生類別的執行個體。
Page 執行中將按照如下順序啟用事件:
Page.PreInit
Page.Init
Page.InitComplite
Page.PreLoad
Page.Load
Page.LoadComplete
Page.PreRender
Page.PreRenderComplete
<iframe border="0" name="I1" align="middle" marginwidth="1" marginheight="1" src="http://www.b199.cn/blog_ads/Google_468_60.htm" frameborder="0" width="470" scrolling="no" height="62"></iframe> 如果頁面從令一個頁面繼承,如BasePage:System.Web.UI.Page,在BasePage中做了一些擴充,如許可權檢查,而其他頁面從BasePage繼承,則BasePage和最終Page的事件啟用順序是:
UI.PreInit
Page.PreInit
UI.Init
Page.Init
UI.InitComplite
Page.InitComplite
UI.PreLoad
Page.PreLoad
UI.Load
Page.Load
UI.LoadComplete
Page.LoadComplete
UI.PreRender
Page.PreRender
UI.PreRenderComplete
Page.PreRenderComplete
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ContentPage.PreInit
Master.Init
ContentPage.Init
ContentPage.InitComplite
ContentPage.PreLoad
ContentPage.Load
Master.Load
ContentPage.LoadComplete
ContentPage.PreRender
Master.PreRender
ContentPage.PreRenderComplete
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UI.PreInit
ContentPage.PreInit
Master.Init
UI.Init
ContentPage.Init
UI.InitComplite
ContentPage.InitComplite
UI.PreLoad
ContentPage.PreLoad
UI.Load
ContentPage.Load
Master.Load
UI.LoadComplete
ContentPage.LoadComplete
UI.PreRender
ContentPage.PreRender
Master.PreRender
UI.PreRenderComplete
ContentPage.PreRenderComplete
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