Hi guys,
I've a question.

I've a Default page with an updatepanel setted in Conditional mode.

When a postback inside the panel was fired the queue events look like this:

Page_Load
UpdatePanel1_Load

is it correct?

What kind of request shell I see on the "Web Development Helper"?
Do you have any pages that explain the events queue of a asp.net page with a updatepanel?
Do you have any tutotials thta explain the correct way how save the element of an update panel that I will use in another one (ex: selectvalue from dropdownlist in a updatepanel1, change the label in updatepanel2) ?

tnx

That's the correct order of events, yes.

You'll see it as a regular post request, but there is an extra header of "X-MicrosoftAjax: Delta=true".

It's not comprehensive, but this post might help a little with the events:  http://encosia.com/2007/10/24/are-you-making-these-3-common-aspnet-ajax-mistakes/

To do that, you'd want to set the dropdown to autopostback.  Then, add the dropdown as an AsyncPostbackTrigger in UpdatePanel2's Triggers collection.  In your Dropdown_OnSelectedIndexChanged handler, if you update the label in UpdatePanel2, the update will automatically be displayed. 

These video tutorials might be helpful:  http://www.asp.net/learn/ajax-videos/