Aspx页面的相关流程和事件

参考资料：

Msdn:

HTTP Handlers and HTTP Modules Overview:

ms-help://MS.MSDNQTR.v90.en/dv_vwdcon/html/f540bdeb-d22e-4e1d-ba8a-fe6c9926283b.htm

ASP.NET Application Life Cycle Overview for IIS 7.0

ms-help://MS.MSDNQTR.v90.en/dv_vwdcon/html/be3378e2-7071-48d4-9d6f-1b31d73bc7aa.htm

OnLoad与Page_Load的差异分析

http://www.cnblogs.com/jintianhu/archive/2010/12/10/1902078.html

.NET (C#) Internals: ASP.NET 应用程序与页面生命周期（意译）

http://www.cnblogs.com/skynet/archive/2010/04/29/1724020.html

Community Server专题四：HttpHandler:

http://www.cnblogs.com/ugoer/archive/2005/09/07/231676.html

Aspx页面继承了：Page

Page类的信息：public class Page : TemplateControl, IHttpHandler

interface IHttpHandler

{

void ProcessRequest(HttpContext ctx);

bool IsReuseable  { get; }

}

接口中ProcessRequest是添加自己的代码进行相应处理的地方。IsReuseable属性指明该HttpHandler的实现类是否需要缓存。

说明：1，Page类是一个httphandler,那么肯定实现了ProcessRequest方法；该方法将处理对aspx页面的请求

      2，继承了TemplateControl,从名字可以看出该类的作用是模板，反编译查看源码发现了如下常用方法的字符串形式

private const string _onTransactionAbortEventName = "OnTransactionAbort";

    private const string _onTransactionCommitEventName = "OnTransactionCommit";

    private const string _pageAbortTransactionEventName = "Page_AbortTransaction";

    private const string _pageCommitTransactionEventName = "Page_CommitTransaction";

    private const string _pageDataBindEventName = "Page_DataBind";

    private const string _pageErrorEventName = "Page_Error";

    private const string _pageInitCompleteEventName = "Page_InitComplete";

    private const string _pageInitEventName = "Page_Init";

    private const string _pageLoadCompleteEventName = "Page_LoadComplete";

    private const string _pageLoadEventName = "Page_Load";

    private const string _pagePreInitEventName = "Page_PreInit";

    private const string _pagePreLoadEventName = "Page_PreLoad";

    private const string _pagePreRenderCompleteEventName = "Page_PreRenderComplete";

    private const string _pagePreRenderEventName = "Page_PreRender";

    private const string _pageSaveStateCompleteEventName = "Page_SaveStateComplete";

private const string _pageUnloadEventName = "Page_Unload";

从这些字符串中可以猜测aspx页面的常用事件的执行和这个类有一点的关系

Machine.Config :

Httphandler配置节

<add verb="*" path="*.aspx" type="System.Web.UI.PageHandlerFactory"/>

反编译查看源码：

PageHandlerFactory的GetHandler初始化实现了IHttpHandler的页面，继承了Page的页面都是满足该要求

   private IHttpHandler GetHandlerHelper(HttpContext context, string requestType, VirtualPath virtualPath, string physicalPath)

    {

        Page page = BuildManager.CreateInstanceFromVirtualPath(virtualPath, typeof(Page), context, true, true) as Page;

        if (page == null)

        {

            return null;

        }

        page.TemplateControlVirtualPath = virtualPath;

        return page;

    }

Page类中有关ProcessRequest的方法

public virtual void ProcessRequest(HttpContext context)——》private void ProcessRequestWithNoAssert(HttpContext context)——》

private void ProcessRequest()——》private void ProcessRequest(bool includeStagesBeforeAsyncPoint, bool includeStagesAfterAsyncPoint)

——》private void ProcessRequestMain(bool includeStagesBeforeAsyncPoint, bool includeStagesAfterAsyncPoint)（在该方法中可以看到页面生命周期的相关事件的执行）