Generate a flat list of all excel cell formulas

Question

I have a massive program written with VBA and cell formulas. I am tasked to reverse engineer it into C# winforms. I figured for a start, I need to see all the cell formulas

Answer 1

Here is some code that I used to get a list of cells on a worksheet with formulas in them. It seems pretty fast.

try
{
    Excel.Worksheet excelWorksheet = workbook.ActiveSheet as Excel.Worksheet;
    Excel.Range formulaCell = excelWorksheet.Cells.SpecialCells(
        Excel.XlCellType.xlCellTypeFormulas, Type.Missing);

    Excel.Range cell;
    foreach (var fc in formulaCell)
    {
        cell = fc as Excel.Range;
        string s1 = cell.Formula as string;
        int c = cell.Column;
        int r = cell.Row;

        // Gives formula text and location of formula.
    }
}
catch (Exception)
{
    ; // Throws an exception if there are no results.
      // Probably should ignore that exception only
}