Get Selected Item text from Multiple Drop Down Lists C#

Question

I am working on a project and have multiple drop down lists, each containing 2 values, either 1 or 0. There are eight drop down boxes total. They all have ID's like this, R_1, R_2, ... R_7, R_8. I am trying to loop through all the drop down lists using their ID's and get the SelectedItem.Text to use later on in the program.

Is there a way to do this?