Iam happy to see some response. Ok let me copy my entire code below. I have dataTable :
summary="This table displays list of users for an accessgroup">
Hi Mallika i am not really clear on what you mean by concatenation. Here is my backing bean code.
I am deliberately setting up keys for all the selected checkboxes in that format ("123-456")because i want to extract the userid later for some other processing. I didn't find any other way to to it. Please advise.