Dev单元格颜色设置

private void gridView_CustomDrawCell(object sender, DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs e)
        {
            if (e.Column.FieldName == "Num")
            {
                try
                {
                    if (Convert.ToDouble(gridView.GetRowCellValue(e.RowHandle,"Num")) > 10)
                    {
                        e.Appearance.BackColor = Color.Gray;
                    }
                    else
                    {
                        e.Appearance.BackColor = Color.Blue;
                    }
                }
                catch(Exception ex)
                {
                    e.Appearance.BackColor = Color.Blue;
                }
            }
        }