How to find checked RadioButton inside Repeater Item?

Question

I have a Repeater control on ASPX-page defined like this:

Answer 1

You could always use Request.Form to get the submitted radio button:

var value = Request.Form["answerVariants"];

I think the submitted value defaults to the id of the that was selected, but you can always add a value attribute - even though it's not officially an property - and this will then be the submitted value: