Playing with TIME and DataGrid

So today i started working on something new and couldn't get any result yet.

I'm basically trying to run some multiple countdown in a Datagrid , What i am trying to do is to run countdown in this format "0:01:53" to "0:00:00" in a particular field of the Datagrid and also trying to make it on a progress bar within the Datagrid so i can see the progress of countdown.

How is it possible to begin several countdowns fetched from couple Text Boxes and show them in the Datagrid on a progress bar , Please show me some example either of just handling a single countdown or multiple , I'll then try to understand and work on it.

Thanks