Adding a new row in a grid(interface)

Also, I would like to comment on the few approaches as mentioned in the above comments:
1. Using a separate variable to retain id or depending on the database may not be wise. The value in the database may change at any time and this change in values confuses the User. Keep it simple, assign temporary ids and let the user know that they are temporary and going to change when persisted to the database. The much simpler thing would be to show the row id which keeps the implementation simple and also makes one easily understandable about it.
2. I am not really sure why the suggestion is being made to show/display values rather than assigning them to a field in the CDT. Again it's not a wise idea to evaluate such a rule for each and every row when you have a possibility of assigning and refreshing them by making use of add/delete dynamic links. Even from the interface performance standpoint, it's not great because the value which is assigned to a text field looks simple but it will be evaluated for each and every row as and when you interact with each component on the interface(whereas refreshing the assigned values can be done only when interacted with grid).

Also, I would like to comment on the few approaches as mentioned in the above comments:
1. Using a separate variable to retain id or depending on the database may not be wise. The value in the database may change at any time and this change in values confuses the User. Keep it simple, assign temporary ids and let the user know that they are temporary and going to change when persisted to the database. The much simpler thing would be to show the row id which keeps the implementation simple and also makes one easily understandable about it.
2. I am not really sure why the suggestion is being made to show/display values rather than assigning them to a field in the CDT. Again it's not a wise idea to evaluate such a rule for each and every row when you have a possibility of assigning and refreshing them by making use of add/delete dynamic links. Even from the interface performance standpoint, it's not great because the value which is assigned to a text field looks simple but it will be evaluated for each and every row as and when you interact with each component on the interface(whereas refreshing the assigned values can be done only when interacted with grid).