How to add row in middle of datatable?

Latha

My recuirement is when user clicks checkbox in the row, on button click I want to get the data of selected row and create a new row next to seleted row.
EXample:

1 A B
2 C D
3 E F
4 G H

If user selects row 3, row 4 should be added with same content.

1 A B
2 C D
3 E F
4 E F
5 G H

I can get the content using GetData, but my problem is adding row in the middle.

Anyone Please help me in this issue.

Thanks in advance.

Regards,
Latha