当应用保护时，EPPlus会剥离Workbook.Properties

如何解决当应用保护时，EPPlus会剥离Workbook.Properties

当我们不保护工作簿时，将按预期方式应用我们设置的属性（例如标题或主题）。

一旦我们将保护应用到工作簿中的所有工作表，属性就会被删除。

我们仍在使用4.x。

这是我们拥有的代码，使用它们会导致剥夺属性。我们尝试在调用此代码之前和之后应用属性，而不会改变结果。

           // protection
           foreach (ExcelWorksheet worksheet in excelPackage.Workbook.Worksheets)
            {
                worksheet.Protection.IsProtected = true;
                worksheet.Workbook.CalcMode = ExcelCalcMode.Automatic;
                worksheet.Protection.AllowAutoFilter = false;
                worksheet.Protection.AllowDeleteColumns = false;
                worksheet.Protection.AllowAutoFilter = false;
                worksheet.Protection.AllowDeleteRows = false;
                worksheet.Protection.AllowEditObject = false;
                worksheet.Protection.AllowEditScenarios = false;
                worksheet.Protection.AllowFormatCells = false;
                worksheet.Protection.AllowFormatColumns = false;
                worksheet.Protection.AllowFormatRows = false;
                worksheet.Protection.AllowInsertColumns = false;
                worksheet.Protection.AllowInsertHyperlinks = false;
                worksheet.Protection.AllowInsertRows = false;
                worksheet.Protection.AllowPivottables = false;
                worksheet.Protection.AllowSelectLockedCells = false;
                worksheet.Protection.AllowSelectUnlockedCells = true;
                worksheet.Protection.AllowSort = false;
                worksheet.Protection.SetPassword("blahblah");
            }

            // Encrypt the file so the end user cannot see private information.
            excelPackage.Encryption.Algorithm = EncryptionAlgorithm.AES256;
            excelPackage.Encryption.IsEncrypted = true;
            excelPackage.Workbook.Protection.LockStructure = true;
            excelPackage.Workbook.Protection.LockWindows = true;
            excelPackage.Workbook.Protection.SetPassword("blahblah");

更新：

进一步审查后，剥夺属性的不是保护而是加密。

注释这两行将生成具有我们设置的属性的Excel文件。

            //excelPackage.Encryption.Algorithm = EncryptionAlgorithm.AES256;
            //excelPackage.Encryption.IsEncrypted = true;