RequiredFieldValidator not working properlly

[josemauricio]

Hello all!

In my system, there is a page with three dropdownlists. The second dropdownlist needs the value of the first one to be feed. So, the autopostback property of the first dropdownlist is set to true, and when the user selects any value of it, its SelectedIndexChanged event is triggered and there, the second dropdownlist is filled. The second and third dropdownlist must be selected to the user be able to submit the page. For that, I put a requiredfieldvalidator for each one that works fine... if no postback is triggered! If I select an option in the first dropdownlist, causing the postback of the page, when I try to submit the page with one or both others dropownlists option blank, nothing happens! Neither the postback or the validation. The page stays as if anything was done!

It seems like something very stupid is occuring, but I'm loosing a very important time with this and I fond out that is better ask for a little help with this.

So, does anyone knows what is happening?

Thanx a lot for any help.

 

[josemauricio]

Well, found the answer:

http://weblogs.asp.net/lkempe/archive/2007/03/26/asp-net-ajax-and-asp-net-validators.aspx

Hope that it may be useful for someone!

Regards!