Excel VBA；更新连接字符串

Question

我只是想让 VBA 更新 OLEDB 连接字符串。当我单步执行代码时，我没有收到任何错误，但连接刷新失败，当我检查 UI 中的连接字符串时，很明显我的代码根本没有更改它（因此刷新失败）。我错过了什么？

代码如下：

Sub UpdateQueryConnectionString(ConnectionString As String)

  With ActiveWorkbook.Connections("Connection Name"). _
      OLEDBConnection
      .Connection = StringToArray(ConnectionString)
  End With
  ActiveWorkbook.Connections("Connection Name").Refresh
End Sub

输入的 ConnectionString 是：

ConnectionString = = "Provider=SLXOLEDB.1;Data Source=SERVER;Initial Catalog=DATABASE" _
& ";User ID=" & Username & ";Password=" & Password & _
";Persist Security Info=True;Extended Properties=" _
& Chr(34) & "PORT=1706;LOG=ON;CASEINSENSITIVEFIND=ON;INCLUDECALCFIELDS=ON;" & Chr(34)

函数 StringToArray 直接从 http://support.microsoft.com/kb/105416 上的示例 4 中复制

Answer 1

知道了。以下代码有效。

Sub UpdateQueryConnectionString(ConnectionString As String)

  Dim cn As WorkbookConnection
  Dim oledbCn As OLEDBConnection
  Set cn = ThisWorkbook.Connections("Connection Name")
  Set oledbCn = cn.OLEDBConnection
  oledbCn.Connection = ConnectionString

End Sub

只需将 ConnectionString 作为字符串输入，就像我在最初的问题中说明的那样。

Answer 2

这一行适用于我刷新使用 OLEDB 的代码：

ActiveWorkbook.Connections("Connection Name").OLEDBConnection.Refresh

原因似乎是 excel 要求您指明类型，即使您引用的是特定的命名连接。

Answer 3

我们甚至可以刷新特定的连接，然后它会刷新所有链接到它的枢轴。

对于这段代码，我从 Excel 中的表格创建了切片器：

Sub UpdateConnection()
    Dim ServerName As String
    Dim ServerNameRaw As String
    Dim CubeName As String
    Dim CubeNameRaw As String
    Dim ConnectionString As String

    ServerNameRaw = ActiveWorkbook.SlicerCaches("Slicer_ServerName").VisibleSlicerItemsList(1)
    ServerName = Replace(Split(ServerNameRaw, "[")(3), "]", "")

    CubeNameRaw = ActiveWorkbook.SlicerCaches("Slicer_CubeName").VisibleSlicerItemsList(1)
    CubeName = Replace(Split(CubeNameRaw, "[")(3), "]", "")

    If CubeName = "All" Or ServerName = "All" Then
        MsgBox "Please Select One Cube and Server Name", vbOKOnly, "Slicer Info"
    Else
        ConnectionString = GetConnectionString(ServerName, CubeName)
        UpdateAllQueryTableConnections ConnectionString, CubeName
    End If
End Sub

Function GetConnectionString(ServerName As String, CubeName As String)
    Dim result As String
    result = "OLEDB;Provider=MSOLAP.5;Integrated Security=SSPI;Persist Security Info=True;Initial Catalog=" & CubeName & ";Data Source=" & ServerName & ";MDX Compatibility=1;Safety Options=2;MDX Missing Member Mode=Error;Update Isolation Level=2"
    '"OLEDB;Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=True;Initial Catalog=" & CubeName & ";Data Source=" & ServerName & ";Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Use Encryption for Data=False;Tag with column collation when possible=False"
    GetConnectionString = result
End Function

Sub UpdateAllQueryTableConnections(ConnectionString As String, CubeName As String)
    Dim cn As WorkbookConnection
    Dim oledbCn As OLEDBConnection
    Dim Count As Integer, i As Integer
    Dim DBName As String
    DBName = "Initial Catalog=" + CubeName

    Count = 0
    For Each cn In ThisWorkbook.Connections
        If cn.Name = "ThisWorkbookDataModel" Then
            Exit For
        End If

        oTmp = Split(cn.OLEDBConnection.Connection, ";")
        For i = 0 To UBound(oTmp) - 1
            If InStr(1, oTmp(i), DBName, vbTextCompare) = 1 Then
                Set oledbCn = cn.OLEDBConnection
                oledbCn.SavePassword = True
                oledbCn.Connection = ConnectionString
                Count = Count + 1
            End If
        Next
    Next

    If Count = 0 Then
         MsgBox "Nothing to update", vbOKOnly, "Update Connection"
    ElseIf Count > 0 Then
        MsgBox "Connection Updated Successfully", vbOKOnly, "Update Connection"
    End If
End Sub