在不打开工作簿的情况下检查工作表密码是否受保护

Question

我一直在检查工作簿是否存在工作表或单元格中的内容，而无需使用此命令打开工作簿

f = "'" & strFilePath1 & "[" & strFileType & "]" & strSheetName & "'!" & Range(strCell).Address(True, True, -4150)

CheckCell = Application.ExecuteExcel4Macro(f)

，它一直运行良好，但是现在我想检查一下工作表是否未打开就受到密码保护，但是没有成功。有人知道这是否可能吗？

谢谢您的帮助

Answer 1

是的！是可能的。我很久以前就发现了如何做。我怀疑这在网络上的任何地方都被提及...

基本介绍：众所周知，直到2007版本的Microsoft Excel都使用一种称为Excel Binary File Format（.XLS）的专有二进制文件格式作为其主要格式。 Excel 2007及更高版本使用 Office Open XML 作为其主要文件格式，这是一种基于XML的格式，此格式是在Excel 2002中首次引入的基于XML的先前格式“ XML Spreadsheet”（“ XMLSS”）之后的一种。

逻辑：要了解其工作原理，请执行以下操作

1. 创建一个新的Excel文件
2. 确保至少有3张纸
3. 使用package main import "fmt" func allLongestStrings(inputArray []string) []string { maxLength := len(inputArray[0]) outputArray := []string{} for _, value := range inputArray { if len(value) > maxLength { maxLength = len(value) } } for _, val := range inputArray { if len(val) == maxLength { outputArray = append(outputArray, val) } } return outputArray } func main() { xs := []string{"aa", "aab", "bcd", "a", "cdf", "bb"} fmt.Println(allLongestStrings(xs)) } 密码保护第一张纸
4. 让第二张纸不受保护
5. 使用blank密码保护第三张纸
6. 将文件另存为any，然后关闭文件
7. 将文件重命名为Book1.xlsx
8. 提取zip的内容
9. 转到文件夹Book1.Zip

10. 您将看到工作簿中的所有工作表都保存为\xl\worksheets，Sheet1.xml和Sheet2.xml

    printf(1)

11. 右键单击工作表，然后在记事本/ notepad ++中打开

12. 您会注意到，所有受保护的工作表都有一个单词Sheet3.xml，如下所示

    

因此，如果我们能够以某种方式检查相关表格中是否包含该单词，那么我们可以确定该表格是否受到保护。

代码：

这是可以帮助您实现目标的功能

<sheetProtection

注意：已针对'~~> API to get the user temp path Private Declare Function GetTempPath Lib "kernel32" Alias "GetTempPathA" _ (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long Private Const MAX_PATH As Long = 260 Sub Sample() '~~> Change as applicable MsgBox IsSheetProtected("Sheet2", "C:\Users\routs\Desktop\Book1.xlsx") End Sub Private Function IsSheetProtected(sheetToCheck As Variant, FileTocheck As Variant) As Boolean '~~> Temp Zip file name Dim tmpFile As Variant tmpFile = TempPath & "DeleteMeLater.zip" '~~> Copy the excel file to temp directory and rename it to .zip FileCopy FileTocheck, tmpFile '~~> Create a temp directory Dim tmpFolder As Variant tmpFolder = TempPath & "DeleteMeLater" '~~> Folder inside temp directory which needs to be checked Dim SheetsFolder As String SheetsFolder = tmpFolder & "\xl\worksheets\" '~~> Create the temp folder Dim FSO As Object Set FSO = CreateObject("scripting.filesystemobject") If FSO.FolderExists(tmpFolder) = False Then MkDir tmpFolder End If '~~> Extract zip file in that temp folder Dim oApp As Object Set oApp = CreateObject("Shell.Application") oApp.Namespace(tmpFolder).CopyHere oApp.Namespace(tmpFile).items '~~> Loop through that folder to work with the relevant sheet (file) Dim StrFile As String StrFile = Dir(SheetsFolder & sheetToCheck & ".xml") Dim MyData As String, strData() As String Dim i As Long Do While Len(StrFile) > 0 '~~> Read the xml file in 1 go Open SheetsFolder & StrFile For Binary As #1 MyData = Space$(LOF(1)) Get #1, , MyData Close #1 strData() = Split(MyData, vbCrLf) For i = LBound(strData) To UBound(strData) '~~> Check if the file has the text "<sheetProtection" If InStr(1, strData(i), "<sheetProtection", vbTextCompare) Then IsSheetProtected = True Exit For End If Next i StrFile = Dir Loop '~~> Delete temp file On Error Resume Next Kill tmpFile On Error GoTo 0 '~~> Delete temp folder. FSO.deletefolder tmpFolder End Function '~~> Get User temp directory Function TempPath() As String TempPath = String$(MAX_PATH, Chr$(0)) GetTempPath MAX_PATH, TempPath TempPath = Replace(TempPath, Chr$(0), "") End Function 和.xlsx文件进行了测试。