Open XML SDK 2.0 - how to update a cell in a spreadsheet?

Question

I want to update a cell in a spreadsheet that is used by a chart, using the Open XML SDK 2.0 (CTP). All the code samples I have found insert new cells. I am struggling with

Answer 1

I made some changes on @AZ code.

First, on GetCell function there is a problem on selecting the current row. Just change:

if (worksheet.GetFirstChild().Elements().Where(r => r.RowIndex == rowIndex).Count() != 0)

instead of:

if (worksheet.Elements().Where(r => r.RowIndex == rowIndex).Count() != 0)

And in the section:

if (string.Compare(cell.CellReference.Value, cellReference, true) > 0)

If you are using Columns above Z Column (as AA column, for example) will not work properly. To some this, I'm using the column numbers to determinate where insert the Cell.

For this, I created a function ColumnIndex, with convert the column letters to numbers:

private static int ColumnIndex(string reference)
    {
        int ci = 0;
        reference = reference.ToUpper();
        for (int ix = 0; ix < reference.Length && reference[ix] >= 'A'; ix++)
            ci = (ci * 26) + ((int)reference[ix] - 64);
        return ci;
    }

So I changed the string compare function for this:

string columnNew = new String(cellReference.Where(c => c != '-' && (c < '0' || c > '9')).ToArray());
            foreach (Cell cell in row.Elements())
            {
                string columnBase = new String(cell.CellReference.Value.Where(c => c != '-' && (c < '0' || c > '9')).ToArray());

                if (ColumnIndex(columnBase) > ColumnIndex(columnNew))
                {
                    refCell = cell;
                    break;
                }
            }

Best Regards.