VB6从XLS导入数据 - 返回为NULL的值

Question

我试图从XLS文件导入VB6数据，并且当单元格上有数据时，一些数据返回为null

我必须将XLS文件中的数据记录为文本，因为我需要在左边有零

我的XLS文件如下所示：

某些单元格有错误： 数字格式化为文本或由撇号处理 这是VB6中为null的单元格

Private Sub Command1_Click()
Dim oRs As ADODB.Recordset
Dim oConn As ADODB.Connection
Dim sConString As String
Dim sXLFile As String
Dim vValue As Variant

sXLFile = "T:\BC\dev\howto_read_excel\ArtigosCampanha\Promoção Mês Criança_1_2015_2015 05 25_2015 06 28_CM.xls"
sConString = "Provider= Microsoft.Jet.OLEDB.4.0;" & " Data Source=" & sXLFile & ";Extended Properties=Excel 8.0;"
Set oConn = New ADODB.Connection

With oConn
    .CursorLocation = adUseClient
    .Open sConString
End With

Set oRs = New ADODB.Recordset

With oRs
    .CursorType = adOpenStatic
    .CursorLocation = adUseClient
    .LockType = adLockPessimistic
    .Source = "SELECT * FROM [Sheet1$]"
    .ActiveConnection = oConn
    .Open
    .MoveFirst
End With

Dim refer As String
Dim cb As String

Do While Not oRs.EOF
'   oRS ("CodBarras")
   refer = IIf(IsNull(oRs.Fields.item("Referencia").value), "NULL", oRs.Fields.item("Referencia").value)
   cb = IIf(IsNull(oRs.Fields.item("CodBarras").value), "NULL", oRs.Fields.item("CodBarras").value)

   'use refer and cb where with some  function
oRs.MoveNext
Loop

oRs.Close
oConn.Close

Set oRs = Nothing
Set oConn = Nothing

End Sub

有人可以帮助我吗？

Answer 1

如果流氓值始终可以转换为真实数字，您可以将所有CodBarras字段项目作为文本引入或将所有这些项目作为数字引入。正在尝试避免崩溃的开销会丢弃看起来像文本的文本。

'as text
.Source = "SELECT [Referencia], CStr([CodBarras]) FROM [Sheet1$]"
'as numbers
.Source = "SELECT [Referencia], CLng([CodBarras]) FROM [Sheet1$]"

这些是VBA / MS Access转换代码。 T-SQL将接近，

'as text
.Source = "SELECT [Referencia], CONVERT(varchar(16), [CodBarras]) FROM [Sheet1$]"
'as numbers
.Source = "SELECT [Referencia], CONVERT(int, [CodBarras]) FROM [Sheet1$]"