Hi Kishor,
Thank you for your interest in Syncfusion Products.
To rebind the datasource of the GridGrouping control, we need to reset the TableDescriptor and also datasource should be set to null. The following code snippet illustrates this:
this.gridGroupingControl1.SuspendLayout();
this.gridGroupingControl1.ResetTableDescriptor();
this.gridGroupingControl1.TableDescriptor.Relations.Reset();
this.gridGroupingControl1.DataSource = null;
this.gridGroupingControl1.DataMember = null;
this.gridGroupingControl1.DataSource = newdatasource;
this.gridGroupingControl1.ResumeLayout(true);
Please find the simple sample in the following link:
http://websamples.syncfusion.com/samples/Grid.Windows/F71892/main.htmPlease let me if this helps.
Regards,
Srirajan