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  • Asp.net life cycle introduction

    1.Page request

      The page request occurs before the page life cycle begins. when the page is requested by a user, Asp.net determines whether the page need to be parsed and compiled, or whether a cached version of the page can be sent in response without running the page.

    2.Start

      In the start step, page properties such as Request and Response are set. At this stage ,the page also determines whether the request is postback or a new request and sets the IsPostBack property,Additionally ,during the start step, the page's UICulture property is set.

    3.Page initialization

      During page initialization,Controls on the page are available and each control's UniqueID property is set.Any themes are also applied to the page,If the current request is a postback,the postback data has not yet been loaded and control property values have not been restored to the values from view state.

    4.Load

      During load,if the current request is a postback, control properties are loaded with information recovered from view state and control state.

    5.Validation

      During validation,the validate method of all validator controls is called,which sets the IsValid property of individual validator controls and of the page.

    6.Postback event handling

      If the request is postback, any event handlers are called.

    7.Rendering

      Before rendering, view state is saved for the page and all controls.during the rendering phase, the page calls the Render method for each control,providing a text writer that writes its output to OutputStream of the page's Response

    8.Unload

      Unload is called after the page has been fully rendered. sent to the client and is ready to be discarded,At this point,page properties such as Response and Request are unloaded and any cleanup is performed.

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  • 原文地址:https://www.cnblogs.com/Excellentchen/p/1661568.html
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