Hi Shashi,
We kindly inform you that there is no such API in our current implementation of OLAP Grid and we don’t have any immediate plan to implement this feature.
And we kindly request you to could report the same through Direct-Trac Developer Support System(
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents ), because you can take the advantage of the expertise of a dedicated support engineer and a guaranteed response time and we hope you will take advantage of this system as well. If you have already reported, please ignore this.
Thanks,
Suriya