打開Exlce，
確定，然后
右擊查看代碼，把這段代碼復制到新建的文件里面
此時Excel會給出提示，選擇否，
，系統會提示保存，在保存的時候選擇啟用宏的工作簿然后保存，此時Excel下拉框多選就搞定了，最后，代碼如下：
Option Explicit Sub Worksheet_Change(ByVal Target As Range) '讓數據有效性選擇 可以多選,重復選 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 oldVal = "" Then Else If newVal = "" Then Else Target.Value = oldVal _ & ", " & newVal End If End If End If exitHandler: Application.EnableEvents = True End Sub
優化后的代碼
Option Explicit
Sub Worksheet_Change(ByVal Target As Range)
'讓數據有效性選擇 可以多選,重復選
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 oldVal = "" Then
Else
If newVal = "" Then
Else
If Target.Column <> 2 And Target.Column <> 3 And Target.Column <> 5 Then
Dim oldValArray
oldValArray = Split(oldVal, ",")
Dim exitVal As Boolean
exitVal = False
Dim i As Integer
Dim resultVal As String
For i = 0 To UBound(oldValArray)
If oldValArray(i) = newVal Then
exitVal = True
Else
If resultVal = "" Then
resultVal = oldValArray(i)
Else
resultVal = resultVal & "," & oldValArray(i)
End If
End If
Next
If exitVal = False Then
If oldVal = newVal Then
Target.Value = resultVal
Else
Target.Value = resultVal & "," & newVal
End If
Else
Target.Value = resultVal
End If
End If
End If
End If
End If
exitHandler:
Application.EnableEvents = True
End Sub
轉載自：https://www.cnblogs.com/boosasliulin/p/5970120.html