Hi Ali,
Sorry for the delay in response.
You can change the backcolor of a particular column by using the GridDataBoundGrid.Model.ColStyles[index].BackColor property. Setting the back color property for by specifying its row index and column index value will work only for the grid control. And as for the GridDataBoundGrid you need to use ColStyles property in order to change the back color for a specific column.
this.gridDataBoundGrid1.Model.ColStyles[1].BackColor = Color.Red;
this.gridDataBoundGrid1.Model.ColStyles[2].BackColor = Color.Red;
this.gridDataBoundGrid1.Model.ColStyles[3].BackColor = Color.Green;
this.gridDataBoundGrid1.Model.ColStyles[4].BackColor = Color.Green;
Please refer the sample which implements the above:
http://websamples.syncfusion.com/samples/Grid.Windows/F67598/main.htmKindly let us know if you need any further assistance.
Thank you for using Syncfusion Products.
Best Regards,
Jeba.