从范围中获取Excel中的单元格值

Question

How can I extract the value of a cell from a range object? It seems like it should be simple. This Stackoverflow question and answers did not really help. Here is what I want to do but it fails every time with an exception on row.columns(0,0).

Dim rdr = oFindings.Range
For Each row As Excel.Range In rdr.Rows
   Dim Account = row.Columns(0,0).value2.tostring
   ' Do other stuff
Next

To make it work I had to implement this code:

For Each row As Excel.Range In rdr.Rows
    ndx = 0
    For Each cell As Excel.Range In row.Columns
        If ndx = 0 Then Account = NS(cell.Value2)
        ' Do other stuff
        ndx += 1
    next
Next

That seems like such a kludge. What is the secret?

Answer 1

Most of the problems have already been alluded to, but here is the answer with code.

    Dim rdr As Excel.Range = oFindings.Range
    For Each row As Excel.Range In rdr.Rows

        'explicitly get the first cell as a range 
        Dim aCell As Excel.Range = row.Cells(1, 1)

        'explicity convert the value to String but don't use .String
        Dim Account as string = CStr(aCell.Value2)

        If Not String.IsNullOrEmpty(Account) Then

            ' Do other stuff

        End If

    Next

Using aCell.Value2.toString will fail if the cell is empty because Value2 will be Nothing . Instead use CStr(aCell.Value2) which won't fail. But then you need to test if the string is null or empty before using the value.