ms-access - 将DAO记录集转换为断开连接的ADO记录集dbDecimal问题

Question

在MS Access VBA(2007)中，我编写了以下函数，以将DAO记录集转换为断开连接的内存中ADO记录集。问题是我在DAO dbDecimal字段上遇到数据类型转换问题。当我尝试将数据从DAO记录集插入到新创建的ADO记录集中时，就会出现问题。当我到达DAO dbDecimal(ADO adNumeric)类型的列时，出现以下错误:

Error -2147217887 (80040e21): 
Multiple-step operation generated errors. Check each status value.

我已经看过了，每次到达此列时都会发生错误。此列中的数据是简单数字，例如25、44、60等。

正如您在下面看到的，我已经硬编码了NumericScale和Precision，但这似乎无济于事。

Public Function ConvertDAORStoADORS(ByRef r1 As DAO.Recordset) As ADODb.Recordset

    If Not r1 Is Nothing Then

        Dim ra As ADODb.Recordset
        Set ra = New ADODb.Recordset

        Dim f1 As DAO.Field, fa As ADODb.Field

        For Each f1 In r1.Fields
            Select Case f1.Type
                Case dbText
                    ra.Fields.Append f1.Name, adVarWChar, f1.Size, adFldIsNullable
                Case dbMemo
                    ra.Fields.Append f1.Name, adLongVarWChar, 10000, adFldIsNullable

                'Here's the problematic one
                Case dbDecimal
                    ra.Fields.Append f1.Name, adNumeric, , adFldIsNullable
                    Set fa = ra.Fields(f1.Name)
                    fa.NumericScale = 19
                    fa.Precision = 4

                Case 9, dbLongBinary, dbAttachment, dbComplexByte, dbComplexInteger, dbComplexLong, dbComplexText, dbComplexSingle, dbComplexDouble, dbComplexGUID, dbComplexDecimal
                    'Unsupported types
                Case Else
                    Debug.Print f1.Name & " " & f1.Type
                    ra.Fields.Append f1.Name, GetADOFieldType(f1.Type), , adFldIsNullable

            End Select
        Next f1
        ra.LockType = adLockPessimistic
        ra.Open
        'On Error Resume Next
        If Not (r1.EOF And r1.BOF) Then
            r1.MoveFirst
            Do Until r1.EOF = True
                ra.AddNew
                For Each f1 In r1.Fields
                    'Error -2147217887 (80040e21) Multiple-step operation generated errors. Check each status value.
                    'Error only occurs on dbDecimal/adNumeric fields
                    ra(f1.Name).value = r1(f1.Name).value
                Next f1
                ra.Update
                r1.MoveNext
            Loop
        End If

        Set ConvertDAORStoADORS = ra
    End If

End Function

Private Function GetADOFieldType(daofieldtype As Integer) As Long
    Select Case daofieldtype
        'Fixed width adWChar does not exist
        Case dbText: GetADOFieldType = adVarWChar
        Case dbMemo: GetADOFieldType = adLongVarWChar
        Case dbByte: GetADOFieldType = adUnsignedTinyInt
        Case dbInteger: GetADOFieldType = adSmallInt
        Case dbLong: GetADOFieldType = adInteger
        Case dbSingle: GetADOFieldType = adSingle
        Case dbDouble: GetADOFieldType = adDouble
        Case dbGUID: GetADOFieldType = adGUID
        Case dbDecimal: GetADOFieldType = adNumeric
        Case dbDate: GetADOFieldType = adDate
        Case dbCurrency: GetADOFieldType = adCurrency
        Case dbBoolean: GetADOFieldType = adBoolean
        Case dbLongBinary: GetADOFieldType = adLongVarBinary
        Case dbBinary: GetADOFieldType = adVarBinary
        Case Else: GetADOFieldType = adVarWChar
    End Select
End Function

我从链接到MS SQL Server 2008的ODBC链接表派生DAO记录集。该字段实际上是SQL Server Decimal(19,4)数据类型。

任何想法如何解决这个问题？

Answer 1

这对我有用，但是我不确定为什么不只是从表中创建ADODB记录集并断开连接。

  Case dbDecimal
      ra.Fields.Append f1.Name, adDecimal, , adFldIsNullable
      Set fa = ra.Fields(f1.Name)
      fa.NumericScale = 19
      fa.Precision = 4

还有，为什么不

    Dim ra As New ADODb.Recordset
    ''Set ra = New ADODb.Recordset