Manipulate Repeater from a class

My first post.

I have a repeater on my default.aspx page. I wanted to have a class (FillRepeater) that has the db connection and also populates the repeater on the page. I can't seem to wrap my mind around this. Anyone with tips on how I can manipulate controls like the Repeater from a class??

I just want to call the class methods on page load instead of having multiple fill repeater methods for the different repeaters I have on my page.

Thanks