Updating datagrid objects after adding new logics and calculations

I have about 200 lines of objects in a datagrid, now I have added two new columns in this data grid whose values are calculated from other columns. Now the issue is I can only have values for new columns after adding new objects while I need to updated the values for all the previously added 200 objects. By going and click edit and save each object is much time consuming. I want some microflow logic to update all objects with one click action.  Any idea? 
1 answers

Create a microflow that has one parameter - a list of the objects in the datagrid.  This microflow should have one action - commit the list of objects.

Add an action button to your grid that calls the microflow.  Configure the button to send all objects in the grid to the microflow.