>Hi all,
>
>Recently, we would like to standardize the function calls in the page events, and discussed about what should be putting in Page_Load and Page_PreRender. However, each of us has different opinions and we would like to refer to expert's opinion. Is they any guidelines or best practise for Page_Load and Page_PreRender events?
>
>Any advice would be greatly appreciated, thanks.

Check this article
http://msdn.microsoft.com/en-us/library/ms972976.aspx#viewstate_topic2

I also tend to put most of event processing logic in Page_Load.