Hi Dave,
Thank you for using Syncfusion products.
In a GridGroupingControl, QueryCellStyleInfo event or TableControlPrepareViewStyleInfo event should be used to set cell styles. In a GridGroupingControl, we cannot use indexers to set style properties (other than the Text) for individual cells. The reason is that in a GridGrouping Control, there are no individual cell styles stored. See the following sample in which required behavior is implemented by using the QueryCellStyleInfo event:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=GGCQuery1364870035.zipIf you want to apply row styles depending on the cellvalues, you could use GridConditionalFormatDescriptor. See the following sample from the sample browser:
..\Windows\Grid.Grouping.Windows\Samples\2.0\Appearance\Conditional Formatting Demo
Please let me know if you have any questions.
Regards,
Jisha