Hi,
I am not sure about the condition that you are checking to set a back color of a row. To use the TableModel for a nested table in a GridGroupingControl this.gridGroupingControl1.GetTableModel(tableName)[e.Inner.RowIndex, e.Inner.RowIndex]must be used. But to set the styles for rows dynamically the QueryCellStyleInfo event would be the best. Please refer to the attached sample.
Regards,
Calvin.
421810.zip