Hi Lakshmi,
Thank you for using Syncfusion products.
Here I have attached the sample, that fulfills below of the requirements.
1)How to add the Control in runtime to GridGrroupingControl.
2)How to fetch the value from one record and set to another column.
Please refer the sample for Implementation.
http://websamples.syncfusion.com/Samples/Grid.Web/6.1.0.34/I44025/main.htm
Please let me know if you need further assistance.
Best regards,
Johnson