MS Access 多选列表移动器 v2

Question

作为对下面列出的上一篇文章的扩展：

Ms Access multi-select listbox mover

关于我在编写多选列表移动程序时遇到的问题，我从这里的一些社区成员那里得到了很大的帮助（感谢 @Parfait 的持续帮助和 @Erik Von Asmuth）。

第一个问题已经解决，但是，我在执行 cmdRemove_Click() 按钮时遇到了一个新问题。问题如下：

我有两个列表框（lfmVocabulary 和 lfmVocabularyAssign）。第一个列表框（lfmVocabulary）具有多选功能，可以选择要分配给一个单元的词汇，从而转移到lfmVocabularyAssign列表框中。我可以毫无问题地选择和传输 .selected（感谢社区），现在我将它们从 lfmVocabularyAssign 列表框发送回 lfmVocabulary 时遇到问题。

假设我有词汇 A、B 和 C。我选择要转移的 A 和 B，点击 cmdAdd 没有问题。但是如果我选择 A & B 并点击 cmdRemove 将它们转移回第一个列表框，C 会在第二个列表框中代替 A & B！

这是我的代码：

Option Compare Database


Private Sub cmdAdd_Click()

Dim in_clause As String: in_clause = ""
Dim strSQL As String, i As Integer

' ITERATE TO BUILD COMMA-SEPARATED LIST FOR SQL IN() CLAUSE
With Me.lfmVocabulary
    For n = 0 To .ListCount - 1
       If .Selected(n) = True Then
           in_clause = in_clause & .ItemData(n) & ", "
       End If
    Next n
End With

' REMOVE LAST COMMA AND SPACE
in_clause = Left(in_clause, Len(in_clause) - 2)

strSQL = "SELECT * FROM qryVocabularyDefinitions" _
           & " WHERE VocabSpeechDefID IN (" & in_clause & ")"

Me.lfmVocabularyAssign.RowSource = strSQL
Me.lfmVocabularyAssign.RowSourceType = "Table/Query"
Me.lfmVocabularyAssign.Requery

End Sub

Private Sub cmdClearAll1_Click()

 Dim n As Integer

    With Me.lfmVocabulary
        For n = 0 To .ListCount - 1
            .Selected(n) = False
        Next n
    End With

End Sub

Private Sub cmdClearAll2_Click()

 Dim n As Integer

    With Me.lfmVocabularyAssign
        For n = 0 To .ListCount - 1
            .Selected(n) = False
        Next n
    End With

End Sub

Private Sub cmdRemove_Click()

Dim in_clause As String: in_clause = ""
Dim strSQL As String, i As Integer

' ITERATE TO BUILD COMMA-SEPARATED LIST FOR SQL IN() CLAUSE
With Me.lfmVocabularyAssign
    For n = 0 To .ListCount - 1
       If .Selected(n) = True Then
           in_clause = in_clause & .ItemData(n) & ", "
       End If
    Next n
End With

' REMOVE LAST COMMA AND SPACE
in_clause = Left(in_clause, Len(in_clause) - 2)

strSQL = "SELECT * FROM qryVocabularyDefinitions" _
           & " WHERE VocabSpeechDefID NOT IN (" & in_clause & ")"

Me.lfmVocabularyAssign.RowSource = strSQL
Me.lfmVocabularyAssign.RowSourceType = "Table/Query"
Me.lfmVocabularyAssign.Requery

End Sub

Private Sub cmdSelectAll1_Click()

 Dim n As Integer

    With Me.lfmVocabulary
        For n = 0 To .ListCount - 1
            .Selected(n) = True
        Next n
    End With

End Sub


Private Sub cmdSelectAll2_Click()
 Dim n As Integer

    With Me.lfmVocabularyAssign
        For n = 0 To .ListCount - 1
            .Selected(n) = True
        Next n
    End With
End Sub

Private Sub cmdAssign_Click()

:(

End Sub

Private Sub Form_Load()

    Me.lfmVocabulary.RowSource = "qryVocabularyDefinitions"
    Me.lfmVocabulary.RowSourceType = "Table/Query"
    Me.lfmVocabulary.Requery

End Sub 

Answer 1

好吧，您在这里遇到了一个明显的问题，因为@Parfait 他对您最初问题的解决方案使得来回移动项目变得更加困难，因为它们是使用查询拉入的。我假设他的解决方案项目没有从第一个列表中删除，只添加到第二个列表中。如果是这样，这应该工作：

Private Sub cmdRemove_Click()

Dim in_clause As String: in_clause = ""
Dim strSQL As String, n As Integer
'Set the SQL to the current SQL
strSQL = Me.lfmVocabularyAssign.RowSource


' ITERATE TO REMOVE ITEMS FROM COMMA-SEPARATED LIST FOR SQL IN() CLAUSE
With Me.lfmVocabularyAssign
    For n = 0 To .ListCount - 1
       If .Selected(n) = True Then
           If InStr(1, strSQL, ", " & .ItemData(n) ) <> 0 Then
                'Not the first item, nor the only item
                strSQL = Replace(strSQL, ", " & .ItemData(n), "")
           ElseIf InStr(1, strSQL, .ItemData(n) & ", " ) <> 0 Then
                'It's the first item
                strSQL = Replace(strSQL, .ItemData(n) & ", ", "")
            Else
                'It's the only item
                strSQL = Replace(strSQL, .ItemData(n), "")
            End If
       End If
    Next n
End With


Me.lfmVocabularyAssign.RowSource = strSQL
Me.lfmVocabularyAssign.RowSourceType = "Table/Query"
Me.lfmVocabularyAssign.Requery

End Sub