SRSivakumar R Syncfusion Team April 19, 2017 05:11 PM UTC
Hi Amit Saraf,
Thank you for contacting Syncfusion support.
We have analyzed your provided sample. You have subscribed to QueryUnBoundRow whenever you click the button, so handler triggered multiple time. You can achieve your requirement by unsubscribing the QueryUnBoundRow event before subscribing again as in the below code.,