how to display Datalist checked items in repeaters?

How to Show selected checked data from datalist into repeater on submit button?

 

I have one datalist control which has some records, It also has child control checkbox named checkbox1 in the itemtemplate of datalist.

 

All I want to do is on the click of a submit button on page, all the checkboxed records should show up in the repeater down below. I managed to get the item.index value of the checked records into a array. But I don't know how to show the selected data into the repeater.