Where in the page lifecycle does validation occur?

[paul.hester]

Hi all,

I don't use auto postbacks on my web site to keep it javascript-free
and browser agnostic. Whenever there's a postback to my page I'm using
the Page_Load event to use the posted data for database updates.
However, the page hasn't been validated at this point. I can call
Validate() at this point, but this means the controls will be validated
twice.

At what point in the page lifecycle are the controls validated? When
would be the best time and place to use the posted data for a database
update, if not using auto postbacks? My current method doesn't seem
ideal.

Thanks in advance,

Paul

 

[Teemu Keiski]

Hi,

it happens just before postback events are raised (after Page_Load). In
practise, if you have a Button on Page which triggers validation, it happens
just before Button's Click event is raised. In the Button's Click event, you
could then just check Page.IsValid.

 

[paul.hester]

Thanks Teemu,

If I don't want to use button events (to avoid the need for javascript)
where's the best place to check if the posted data is valid and do
database updates, redirects etc.?

Thanks,

Paul

 

[Teemu Keiski]

Just before you need the data. generally you'd want to use events as they
help in keeping the page code structure clean. Otherwise you have code
centralized in one place trying to deal all cases.

Note that Js validation isnt that bad, you have server-side validation
backing it up in any case.