I have a data like that in the Gridview

ID, Name, Amount

1     ABC     10000

2     SKY     1570000

3     MNO   12537409600

i want to display amount data with commas like that in the Gridview

ID, Name, Amount

1     ABC     10,000

2     SKY     15,70,000

3     MNO   1,25,37,40,9,600

how to get solution plz?