hi,
i have data which brought from parsing json formate and attached this data to datatable,here my question is after performing drag and drop in ultragrid ,how should the data should save in josn file again,that is when opening the grid ,that changes that i have made previously should remain as it is

example
when i drag the customer id "500" and dropped at some other place after closing and reopening the grid changed id should be present at the changed position.here as im not having database to save the changes ,how should i save the changes to json file .
Any help would be appreciated.Thanks in advance