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我的代码生成一个 OpenXML 电子表格,我想防止修改和删除操作。我的解决方案似乎有效,但我发现在 Excel 中打开它,在“审阅”面板中,我可以按下“取消保护”按钮,并且 Excel 无需询问任何密码即可取消保护选定的工作表。我怎样才能避免这种情况?

String password = Guid.NewGuid().ToString().Replace("-", string.Empty).Substring(0, 16);

using (SpreadsheetDocument excelDoc = SpreadsheetDocument.Open(input, true))
{
    foreach (WorksheetPart worksheetPart in excelDoc.WorkbookPart.WorksheetParts)
    {
        SheetProtection sp = new SheetProtection()
        {
            Sheet = true,
            SelectLockedCells = false,
            SelectUnlockedCells = false,
            Password = password,
            Objects = true,
            Scenarios = true,
            // AlgorithmName = "SHA-256"
        };
        foreach (OpenXmlElement currentChildElement in worksheetPart.Worksheet.ChildElements)
        {
            if (currentChildElement is SheetData)
            {
                worksheetPart.Worksheet.InsertAfter(sp, currentChildElement);
                worksheetPart.Worksheet.Save();
            }
        }
    }
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