Question

I have a DataGridView with unbound data that contains three different DataColumns. The rows can be sorted by each column, but other than that no manipulation of the displayed data is allowed.

When I query the SelectedRows property the rows are sorted in the order I initially inserted them, and not like I expected in the currently displayed or selected order. Is there a way to change this behavior?

Answer 1

I don’t think there’s a one-line way to do this. You will need to redo the sort into your own list, then use IndexOf with the SelectedItems to find out the visual position.

List<DataGridViewRow> l = new List<DataGridViewRow>();
foreach (DataGridViewRow r in dgv.Rows)
{
    l.Add(r);
}

l.Sort((x, y) =>
    {
        IComparable yComparable = (IComparable)x.Cells[dgv.SortedColumn.Index].Value;
        IComparable yc = (IComparable)x.Cells[dgv.SortedColumn.Index].Value;

        if (dgv.SortOrder == SortOrder.Ascending)
            return yc.CompareTo(yComparable);
        else
            return yComparable.CompareTo(yc);
    }
    );

foreach(DataGridViewRow r in dgv.SelectedRows)
{
    int selectedIndex = l.IndexOf(r);
}

Note the above has not been compile tested and might need some tweaking.