private void fg_BeforeDragColumn(object sender, C1.Win.C1FlexGrid.DragRowColEventArgs e)
{
// get range with merged columns
CellRange rg = fg.GetMergedRange(_rowDown, e.Col);
// calculate parameters to move column range
int indexOld = rg.LeftCol;
int indexNew = e.Position;
int count = rg.RightCol - rg.LeftCol + 1;
if (indexOld < indexNew)
{
indexNew = indexNew - count + 1;
}
// move column range
fg.Cols.MoveRange(indexOld, count, indexNew);
// cancel default processing, we're done
e.Cancel = true;
}
