i'm curious as to which events should a drop down list's values be loaded
and when the correct value should be set selected.

And what is the logic behind this timing?

thanks!!!

also is there any concerns with AJAX?

someone at work said he had to move the code that was binding a drop down
list from OnLoad to onPreRender because of an issue with Ajax

"TS" <manofsteele1 (AT) nospam (DOT) nospam> wrote

Hi TS,

AS for databinding and data population for a control, I think it can be
performed at any events before the page render its content. Therefore, all
the following page events during the server-side processing is ok:

Init, Load, PreRender

Actually, from MSDN document, you can get "PreRender" is the last event you
can make changes(which will be persisted into viewstate). Also,
databinding is not necessarily be performed on every request, only when
data changed will you need to perform databinding(or at the first request)
since most databound control store bound data into viewstate(for populating
control collection in sequential requests).

For AJAX, normally, it just do the postback in background thread through
xmlhttp, therefore, I think the basic logic mentioned above is also
suitable. For particular problem or issue, it will depend on how that
problem will affect the page processing or control lifecycle.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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thanks steven

"Steven Cheng[MSFT]" <stcheng (AT) online (DOT) microsoft.com> wrote