Force User Control (specifically ListView) to Refresh Every Time Page Posts Back

Force User Control (specifically ListView) to Refresh Every Time Page
Posts Back

I have 2 user controls in a page, and when 1 posts back and does work
(uploading a file), I'd like the other (a list of all the files uploaded)
to refresh properly.
The user control that needs to refresh pretty much only contains a
ListView with a custom datasource populated through a LINQ to Entities
query.
There are no UpdatePanels and no AJAX involved. (AJAX is out of the
question at this point, because learning every other little thing in .NET
is already time-consuming enough; I'd like to not open the AJAX can of
worms yet, no matter how much I'd like to learn it in general.)
So basically I want to know how to make the darn ListView update itself
anytime anything on the page posts back - whether it's in a user control
or not, whether it's another user control, the page, or whatever else
posting back, and without utterly reloading the page through a
redirection.
Possible?