Turn off dropdownlist repainting when it changes within an update panel

I have several dropdopwnlists within an ajax update panel.
When I change the values within any of the lists, all controls within the update panel reload data as expected such as textboxes and grids
However, I did notice that the dropdownlists themselves seem to repaint instead of just reload the data within them. Is there a way to not have this happen?

Regards to All
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Try placing each one inside its own update panel.
CSUGDENAuthor Commented:
Same behavior.
Ok, in your scriptmanager tag, is the PartialPageRendering property set to true?

If it is not, try adding that property and setting it to true.
Cloud Class® Course: SQL Server Core 2016

This course will introduce you to SQL Server Core 2016, as well as teach you about SSMS, data tools, installation, server configuration, using Management Studio, and writing and executing queries.

CSUGDENAuthor Commented:
Yes I have enabled partialpage rendering

try place the dropdownlist binding code inside !IsPostBack snip as shown below

if (!Page.IsPostBack)
//ddl binding

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
CSUGDENAuthor Commented:
Thanks. I should have caught that one.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.