order of event firing

[Guest]

I have an aspx page with a form on it. There are a couple of textboxes and
an ImageButton. The page is loaded from another page using Server.Transfer.

When I click on the ImageButton, the Page_Load event immediately fires on
the codebehind page and then click event fires. When this happens, the
Page.IsPostBack property is true in the page_load event.

Why is the page_load event firing before the ImageButton_Click event?

 

[Scott Allen]

HI Dan:

The sequence of events was designed this way, you can get some more
information from the following doc:
http://msdn.microsoft.com/library/d...guide/html/cpconcontrolexecutionlifecycle.asp

 

[Steven Cheng[MSFT]]

Thanks for Scott's informative info,

Hi Dan,

As for the events in ASP.NET , they're all serverside events which is part
of the ASP.NET serverside Page object Model. Generally when we hit a
control on the page at clientside, browser will first post back page , then
at serverside the request will go through a processing flow. So this is
very different from the concepts we got in winform application. Here are
some other tech articles which may help us get a clear view on these
concepts:

#The ASP.NET HTTP Runtime
http://msdn.microsoft.com/library/en-us/dnaspp/html/dngrfTheASPNETHTTPRuntim
e.asp?frame=true

#The ASP.NET Page Object Model
http://msdn.microsoft.com/library/en-us/dnaspp/html/aspnet-pageobjectmodel.a
sp?frame=true

#Understanding ASP.NET View State
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html
/viewstate.asp

Hope also helps. Thanks,

Steven Cheng
Microsoft Online Support

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