Oledb query returns no records

Hi

I am using a sample Oledb to query an excel file. The file exists the code runs with no errors but returns no data, can anyone spot an error in the code.

Rgards
JoeBo

Private Const connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:\Documents and Settings\joe\My Documents\driver quals-input.xls;Extended Properties=""Excel 8.0;HDR=YES;"""
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Try
 
            Dim conn As New OleDbConnection(connstring)
            Dim da As New OleDbDataAdapter("Select * From [Sheet1$]", conn)
            Dim ds As DataSet = New DataSet()
            da.Fill(ds)
            Debug.WriteLine(vbCrLf & "ContactData:" & vbCrLf & "==============")
            Dim dr As DataRow
            For Each dr In ds.Tables(0).Rows
                Debug.WriteLine(dr("Name") & " - " & dr("Mobile No") & " - " & dr("Home No"))
            Next
            conn.Close()
 
        Catch ex As Exception
            MsgBox(Err.Description)
        End Try
    End Sub

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JoeBo747Asked:
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oobaylyCommented:
I can't see anything wrong with the code. I've just tested the following code (it's in C#, but you can get the gist of it) with the attached XLS file, and the Rows array returned contains the correct data.


      string connString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
      @"Data Source=c:\foo.xls;Extended Properties=""Excel 8.0;HDR=YES;""";
 
      OleDbConnection conn = new OleDbConnection(connString);
      OleDbDataAdapter adapter = new OleDbDataAdapter(
        "SELECT * FROM [Sheet1$]", conn);
 
      DataSet ds = new DataSet();
      adapter.Fill(ds);
 
      DataRow[] rows = ds.Tables[0].Select();

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foo.xls
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JoeBo747Author Commented:
Hi oobaly
Thanks for your response, I have converted the code supplied to vb.net and attempted to query the file using the code below, I get no rows returned. I am using Excel 2007! Is this an issue(I have saved the workbook as an 2003 style workbook).
Regards
Joe  

 Dim conn As OleDbConnection = New OleDbConnection(connstring)
            Dim adapter = New OleDbDataAdapter("SELECT * FROM [Sheet1$]", conn)
 
            Dim ds As DataSet = New DataSet()
            adapter.Fill(ds)
 
            If ds.Tables(0).Rows.Count > 0 Then
                Dim rows() As DataRow = ds.Tables(0).Select()
 
                MsgBox(rows(0).Item(0).ToString)
            End If

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jinalCommented:
can you please attach some part of your excel file over here ?
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oobaylyCommented:
Well, I don't even have Excel installed on my machine, I created the xls file using OpenOffice which allows me to save in "MS Excel 97/2000/XP", and I can't save in a newer versions to test.

I'm not convinced the version of Excel installed on the system should make a difference as you're using the MS Jet DB driver to access an Excel file.

You said "and attempted to query the file using the code below". Do you mean the sample Excel file that I provided, or your own Excel file? If it was the file I provided, I really can't see why nothing is being returned.

If you go to Control Panel -> Administrative Tools -> Data Sources (ODBC) -> Drivers, can you tell me what version of ODBCJT32.dll you're using, not that I'm entirely convinced that's the issue either.
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JoeBo747Author Commented:
Hi oobaly
I am using  4.00.6305.00 dll the file I am trying to query is  both the file you supplied (foo.xls)and my own file!
Regards
Joebo
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JoeBo747Author Commented:
Hi
I believe I may have fallen for excels positive indexing style because when I look at the table using

Dim rows() As DataRow = ds.Tables(1).Select()

Rather than

Dim rows() As DataRow = ds.Tables(0).Select()


I return a value as expected!

Thanks for your time
Joebo
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