for (int i = 0; i < gridView1.RowCount; i++)
            {
                int rowHandle = gridView1.GetVisibleRowHandle(i);
                if (gridView1.IsGroupRow(rowHandle))
                {
                    string text = gridView1.GetGroupRowDisplayText(rowHandle);
                    //...
                }
                if (gridView1.IsDataRow(rowHandle))
                {
                    for (int c = 0; c < gridView1.VisibleColumns.Count; c++)
                    {
                        object v = gridView1.GetRowCellValue(rowHandle, gridView1.VisibleColumns[c]);
                        //...
                    }
                }
            }