Checkboxes and Data Grids
I'm trying to simulate adding email addresses from a Contact List (datagrid) to an "Recipient List" input field. (see image)
I followed this tutorial on radio buttons in data rows,
but it REPLACES the the value in the target input field with the selected value from the datagrid.
How can I DISPLAY ADDITIONAL VALUES from a datagrid value to an existing value in a target input field?