Hi Dev,
You can try these code snippet.
GridConditionalFormatDescriptor Format1 = new GridConditionalFormatDescriptor("Row");
Format1.Expression = "[Col2] Like 'One'";
Format1.Appearance.AnyRecordFieldCell.BackColor = Color.Red;
this.gridGroupingControl1.TableDescriptor.ConditionalFormats.Add(Format1);
Here is a sample for implementating the Conditional format descriptor with the combobox column in a grid
GGC_Foramt.zipBest regards,
Haneef