When's the earliest i can access some Session data in global.asax?

杀马特。学长 韩版系。学妹 提交于 2019-12-01 02:29:47

I always believed Application_AcquireRequestState was the first event in Global.asax that could access the current session. It's definitely not Application_BeginRequest.

MSDN casually mentions that the session state is acquired during Application_PostAcquireRequestState event. I wish it was restated at the Life Cycle Overview page.

The latest you can access session state is in Application_PostRequestHandlerExecute, as it is saved by SessionStateModule during the next event Application_ReleaseRequestState.

You need to use BeginRequest (http://msdn.microsoft.com/en-us/library/system.web.httpapplication.beginrequest.aspx) as it is the first event fired on the HttpApplication object (which the Global.asax inherits).

You'll see more about the ASP.NET Application Lifecycle here - http://msdn.microsoft.com/en-us/library/ms178473.aspx (this is for IIS 5 & IIS 6).

Funky81

According to link text, the earliest events in global.asax that you can access session objects is when global.asax fires Session_Start event

Session__Start: Fired when a new user visits the application Web site.
Session__End: Fired when a user's session times out, ends, or they leave the application Web site

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