RowDataBound function of GridView

I have a DataTable that contains 3 fields: ACount, BCount and DCount. If ACount < 0 then I need to display ‘S’ in one of the columns of the GridView. If ACount > 0 then I have to display ‘D’ in that column(in label). Same thing with BCount and DCount. How can I do this conditional check in the RowDataBound function?