Question

I’m trying to write an app that will open an excel spreadsheet find the worksheet with the correct name and iterate through the rows until I find the cell at column 0 that contains the text “Cont Date” and then read through until I find the first blank cell (column 0 as well). I’m getting hung up on how to iterate through the rows.

Here’s what I have so far:

public static void LoadFromFile(FileInfo fi)
{
    Application ExcelObj = new Application();

    if (ExcelObj != null)
    {
        Workbook wb = ExcelObj.Workbooks.Open(fi.FullName,
             Type.Missing, true, Type.Missing, Type.Missing,
             Type.Missing, Type.Missing, Type.Missing, Type.Missing,
             Type.Missing, Type.Missing, Type.Missing, Type.Missing,
             Type.Missing, Type.Missing);

        Sheets sheets = wb.Worksheets;

        foreach (Worksheet ws in sheets)
        {
            if (ws.Name == "Raw Data")
                LoadFromWorkSheet(ws);
        }

        wb.Close(false, Type.Missing, Type.Missing);
    }
}

public static void LoadFromWorkSheet(Worksheet ws)
{
    int start = 0;
    int end = 0;

    // Iterate through all rows at column 0 and find the cell with "Cont Date"
}

Apparently you can’t

foreach(Row row in worksheet.Rows)
{

}

EDIT::

What I did was this:

for (int r = 0; r < 65536; r++)
{
    string value = ws.Cells[r, 0].Value;
}

Which gives me the following exception when trying to read the value of the cell:

Exception from HRESULT: 0x800A03EC

Answer 1

You can use the Cells property and since columns start with 1, I think you meant column 1:

int contDateRow=0;
int firstBlankRowAfterContDate=0;

for (int row=1;row<=woksheet.Rows.Count;++row)
  if (worksheet.Cells[row,1].Value=="Cont Date")
  {
    contDateRow=row; 
    break;
  }

if (contDateRow!=0)
{
  for (int row=contDateRow;row<=woksheet.Rows.Count;++row)
    if (worksheet.Cells[row,1].Value=="")
    {
      firstBlankRowAfterContDate=row; 
      break;
    }
}

// Do something with contDateRow and firstBlankRowAfterContDate...