I have a matrix with say 3 Columns - Col_A,Col_B,Col_C.
Col_A & Col_B are databound to DBDatasource. I need to calculate the difference(Col_A-Col_B) for every row & put that value into Col_C. How do I achieve this ? I don't want to save any data from Col_C, I just need to display the difference in the third column for every row.