Hi Sai,
Thank you for your interest in Syncfusion products.
To achieve the required behavior the datasource of the grid must support the inserting/removing of rows. Please refer to the following sample for implementation,
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=CS-1311759212.zipPlease let me know if this helps.
Regards,
Jisha