"Rebind" or page_load a usercontrol on a page when a property of the usercontrol is changed in the parent page

i have a usercontrol.. and i'd like to set one of it's property's from the parent page and at the same time "reload" the usercontrol so it's updated.

formally the usercontrol was picking up a querystring parameter and setting itself up with the querystring parameter.. now i'd like to set this from within the parent page..

open to any suggestions. 开发者_Python百科thanks!