Excel中ActiveX控件智能下拉因保护失效，求VBA自动解锁方案

Hey there, let's get your auto-unlock functionality sorted out properly!

First, let's break down the issues in your current code and fix them step by step:

1. Fix the Workbook_Open Event Code #

Your existing code in ThisWorkbook has two key problems:

• Syntax error: UnProtect Password = "password" is incorrect — it should use Password:="your-password" (colon equals instead of just equals).
• You're targeting the workbook structure protection, but the actual issue is with the worksheet protection on "tab0".

Here's the corrected code for ThisWorkbook:

Private Sub Workbook_Open()
    ' Replace "xxx" with your actual worksheet protection password
    Worksheets("tab0").Unprotect Password:="xxx"
End Sub

2. Even Better: Use UserInterfaceOnly for Smarter Protection #

Since you can't unlock cells (due to template validation failures), a more elegant solution is to protect the worksheet with UserInterfaceOnly:=True. This keeps the worksheet locked for user actions but lets VBA and your ActiveX controls work without needing to repeatedly unlock/lock the sheet.

Update your Workbook_Open event to this:

Private Sub Workbook_Open()
    With Worksheets("tab0")
        ' First unprotect if the sheet is already protected
        If .ProtectContents Then
            .Unprotect Password:="xxx"
        End If
        ' Re-protect with UserInterfaceOnly enabled
        .Protect Password:="xxx", UserInterfaceOnly:=True
    End With
End Sub

This way, your ActiveX dropdown will work normally while the worksheet stays protected for users, and your cell locking remains intact (so template validation won't fail).

3. Clean Up Redundant Code #

Your Worksheet_BeforeDoubleClick code is no longer needed if you're handling the unlock on workbook open — feel free to remove it unless you need double-click to trigger other actions.

Important Notes #

• Save your workbook as an Excel Macro-Enabled Workbook (.xlsm) — otherwise, the macros won't run when you open it.
• Double-check that the password in the code matches exactly what you use to manually unlock the sheet (it's case-sensitive!).
• If you want to re-protect the sheet automatically when closing the workbook, add this to ThisWorkbook:

  Private Sub Workbook_BeforeClose(Cancel As Boolean)
      Worksheets("tab0").Protect Password:="xxx"
  End Sub
  

That should resolve the issue: your ActiveX dropdown will work automatically when you open the workbook, and your cell locking stays intact for template uploads.

内容的提问来源于stack exchange，提问作者Kamini