Writing to Excel Named Ranges using OLEDB and VB.NET 2005

Hi Experts,
I'm trying to write some code in VB.NET 2005 to write data to Excel using OLEDB, and VB.NET 2005.  Specifically I need to be able to:
a) Write data to an Excel spreadsheet to a single cell defined named range (i.e. the named range called "CustomerName")
b) Write data to a specific cell within a named range (i.e. Row(0).Column(4) within named range "Orders")
c) To be able to defined a range within Excel (ie. Sheet1 A1:F100 = "Orders")

There is some urgency so I'm generous with the points.  Good luck!

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Sub macro1()
    ActiveWorkbook.Names.Add Name:="CustomerName", RefersToR1C1:="=Sheet1!R1C1:R1C1" 'Names cell A1 'CustomerName'
    [CustomerName] = 12 'Puts 12 into 'CustomerName'
    ActiveWorkbook.Names.Add Name:="Orders", RefersToR1C1:="=Sheet1!R1C1:R4C6" 'Names range A1:F4 'Orders'
    [Orders].Cells(1, 4) = 13 'Places 13 in row 1, column 4 of the range named 'Orders'
End Sub

Hope that helps

darcher23Author Commented:
Hi Patrick,

I need to use OLEDB as I don't want instantiate Excel.  I need code that looks a little like the snippet below (only it needs to work!).

Dim m_sConn1 As String
            m_sConn1 = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
                              "Data Source=" & strPath.ToString & ";" & _
                              "Extended Properties=""Excel 8.0;HDR=NO"""

            Dim conn1 As New System.Data.OleDb.OleDbConnection(m_sConn1)

            Dim cmd As New System.Data.OleDb.OleDbCommand
            cmd.Connection = conn1
            cmd.CommandText = "UPDATE [Sheet1$] SET [CompanyName] = '99999'"


That's not my area of knowledge.


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Rory ArchibaldCommented:
If you use a recordset you can do it (this is VBA code but hopefully the gist is clear:

Sub UpdateNameData()
    ' Sample demonstrating how to return a recordset from an open workbook
    Dim cn As ADODB.Connection, strQuery As String, rst As ADODB.Recordset
    Set cn = New ADODB.Connection
    With cn
        .Provider = "Microsoft.Jet.OLEDB.4.0"
        .ConnectionString = "Data Source=C:\Database\export_test.xls;" & _
            "Extended Properties=""Excel 8.0;HDR=NO"""
    End With
    Set rst = New ADODB.Recordset
    With rst
        .ActiveConnection = cn
        .CursorType = 3                    'Static cursor.
        .LockType = 2                      'Pessimistic Lock.
        .Source = "Select * from [CompanyName]"
        .Fields(0).value = "99999"
    End With
    Set cn = Nothing
End Sub

darcher23Author Commented:
Hi All,

Just to wrap this up, I ended getting a series of strange errors using OLEDB together with large spreadsheets with defined named ranges.  I ended up using a 3rd party component called GemBox Professional.

I suggest PAQ and points refunded as the questionner solved his own problem and has now reported the solution.

PAQed with points refunded (500)

EE Admin

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