DropDownList inside UpdatePanel Performance Issue (IE7 vs. FireFox)

hey,

I have a weird performance issue that i just don't know how to explain:

I built a simple page that has a dropdownlist and a button controls, both of them are inside an update panel.

When a user clicks on the button for the first time, it loads the dropdownlist with 2000 items (just for testing purposes). On the second click, it clears the dropdownlist and fill it with only 2 items. The code is very simple. All in the code behind

I tried the page on IE7 and FireFox. In IE7: the page pauses on the second load (the clear of the 2000 items and the load of the 2 items), while firefox is so much faster.

I removed the update panel and tried the page again, its fast on both IE7 and FireFox. Also tried to add some javascript code to clear the list on the client side, its also too slow.

Does anyone knows a way how to improve it on IE7 :) beside uninstalling it and use FireFox instead :)

thnx 4 ur time

Honestly, I had a lot of performance issues with IE with several of the AJAX controls. We ended up buying a product that is much better than the free one.

i've never seen a dropdownlist that has 2000 items in it before.

what you might want to do is categorizing the items into group(s) and use 2 or more dropdownlist(s). definitely will increase your performance.

Thanks 4 the reply. But its not just about 2000 items, even if you make them 1000 (unfortunately, this is the business logic, that i have to display all the items). Why does FireFox is so much faster, is there something i can do to optimize it.

Thanks