Visual Basic Programming Code Examples

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Cloning or copying an ADO recordset



Cloning or copying an ADO recordset

The code below shows how to copy/clone an existing ADO recordset. This functionality can be useful if you want to keep an copy of the data before the user makes any changes (note, you can also use the oRs.Fields(x).OriginalValue property for this).


'Purpose   :    Creates a copy an existing client side ADO recordset
'Inputs    :    oRs                 The recordset to copy
'Outputs   :    Returns a copy of the recordset on success, or nothing on failure.
'Notes     :

Function RsClone(oRs As ADODB.Recordset) As Recordset
    Dim oStream As ADODB.Stream, oRsClone As ADODB.Recordset
    
    On Error GoTo ErrFailed
    If oRs.CursorLocation = adUseClient Then
        Set oStream = New ADODB.Stream
        oRs.Save oStream, adPersistXML
        Set oRsClone = New ADODB.Recordset
        oRsClone.Open oStream
        Set oStream = Nothing
        Set RsClone = oRsClone
        Set oRsClone = Nothing
    Else
        Debug.Print "Must use client side recordsets..."
        Debug.Assert False
    End If

    Exit Function

ErrFailed:
    Debug.Print Err.Description
    Debug.Assert False
    Set RsClone = Nothing
End Function