在導航欄 點選資料 選擇 資料格式驗證

設定 選擇序列 來源中選擇 需要的資料

右鍵BZJGJ選擇檢視程式碼 複製程式碼儲存

Option Explicit

Sub Worksheet_Change(ByVal Target As Range)
'讓資料有效性選擇 可以多選,重複選
Dim rngDV As Range
Dim oldVal As String
Dim newVal As String
If Target.Count > 1 Then GoTo exitHandler

On Error Resume Next
Set rngDV = Cells.SpecialCells(xlCellTypeAllValidation)
On Error GoTo exitHandler

If rngDV Is Nothing Then GoTo exitHandler

If Intersect(Target, rngDV) Is Nothing Then
   
 
'do nothing
Else
  Application.EnableEvents = False
  newVal = Target.Value
  Application.Undo
  oldVal = Target.Value
  Target.Value = newVal
  If Target.Column = 11 Then '這裡規定好哪一列的資料有效性是多選的，A列是第1列，依次類推，如3就是C列，7就是G列
    If oldVal = "" Then
      'do nothing
      Else
      If newVal = "" Then
      
 
'do nothing
      Else
        If InStr(1, oldVal, newVal) <> 0 Then  '重複選擇視同刪除
          If InStr(1, oldVal, newVal) + Len(newVal) - 1 = Len(oldVal) Then '最後一個選項重複
            Target.Value = Left(oldVal, Len(oldVal) - Len(newVal) - 1)
          Else
            Target.Value = Replace(oldVal, newVal & "
 
,", "") '不是最後一個選項重複的時候處理逗號
          End If
        Else '不是重複選項就視同增加選項
        Target.Value = oldVal & "," & newVal
'      NOTE: you can use a line break,
'      instead of a comma
'      Target.Value = oldVal _
'        & Chr(10) & newVal
        End If
      End If
    End If
  End If
End If

exitHandler:
Application.EnableEvents = True
End Sub

結果