如何在c#中使用openxml啟用對excel中某些指定單元格和工作表的只讀權限

Question

我正在讀取 XML 數據然后我粘貼到數據集和我創建的電子表格並將數據復制到電子表格中的工作表中。所以現在我只想允許一些工作表和單元格為只讀。 為了防止某些工作表中的標題和數據沒有更改，所以我發布了用於使用開放 XML 將 XML 轉換為 excel 的代碼。 所以我需要防止寫一些工作表和單元格一些工作表。

public void ExportDSToExcel(DataSet ds, string dest)
{
    using (var workbook = SpreadsheetDocument.Create(dest, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
    {
        var workbookPart = workbook.AddWorkbookPart();
        workbook.WorkbookPart.Workbook = new DocumentFormat.OpenXml.Spreadsheet.Workbook();
        workbook.WorkbookPart.Workbook.Sheets = new DocumentFormat.OpenXml.Spreadsheet.Sheets();

        uint sheetId = 1;

        foreach (DataTable table in ds.Tables)
        {
            var sheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>();
            var sheetData = new DocumentFormat.OpenXml.Spreadsheet.SheetData();
            sheetPart.Worksheet = new DocumentFormat.OpenXml.Spreadsheet.Worksheet(sheetData);                

            DocumentFormat.OpenXml.Spreadsheet.Sheets sheets = workbook.WorkbookPart.Workbook.GetFirstChild<DocumentFormat.OpenXml.Spreadsheet.Sheets>();
            string relationshipId = workbook.WorkbookPart.GetIdOfPart(sheetPart);

            if (sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Count() > 0)
            {
                sheetId =
                    sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Select(s => s.SheetId.Value).Max() + 1;
            }

            DocumentFormat.OpenXml.Spreadsheet.Sheet sheet = new DocumentFormat.OpenXml.Spreadsheet.Sheet() { Id = relationshipId, SheetId = sheetId, Name = table.TableName };
            sheets.Append(sheet);

            DocumentFormat.OpenXml.Spreadsheet.Row headerRow = new DocumentFormat.OpenXml.Spreadsheet.Row();

            List<String> columns = new List<string>();
            foreach (DataColumn column in table.Columns)
            {
                columns.Add(column.ColumnName);

                DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(column.ColumnName);
                headerRow.AppendChild(cell);
            }

            sheetData.AppendChild(headerRow);

            foreach (DataRow dsrow in table.Rows)
            {
                DocumentFormat.OpenXml.Spreadsheet.Row newRow = new DocumentFormat.OpenXml.Spreadsheet.Row();
                foreach (String col in columns)
                {
                    DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
                    cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
                    cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(dsrow[col].ToString()); //
                    newRow.AppendChild(cell);
                }

                sheetData.AppendChild(newRow);
            }
        }
    }
}
    protected void Button1_Click(object sender, EventArgs e)
    {
        if(txtname.Text != null)
        {
            if (FileUpload1.HasFile == true)
            {
        string myXMLfile = "/uploads/" + FileUpload1.FileName;
        FileUpload1.SaveAs(Server.MapPath(myXMLfile));
        string dest = "D:/uploads/" + txtname.Text+".xlsx";
        DataSet ds = new DataSet();
        try
        {

            ds.ReadXml(myXMLfile);

        }
        catch (Exception ex)
        {
            lblstatus.Text=(ex.ToString());
        }
            ExportDSToExcel(ds, dest);

    }
            else
            {
               lblstatus.Text = "Please Upload the file ";
            }
        }
        else {

            lblstatus.Text = "Please enter the name ";
        }

    }
}

提前致謝，請幫助我在此代碼中找到解決方案。

Answer 1

我們可以通過不同的方式自定義密碼保護。為了使excel工作表指定區域或列或行為只讀或通過密碼保護工作表將整張工作表變為只讀。如果我們想保護整個工作表使用此代碼

 PageMargins pageM = sheetPart.Worksheet.GetFirstChild<PageMargins>();
                   SheetProtection sheetProtection = new SheetProtection();
                   sheetProtection.Password = "admin";
                   sheetProtection.Sheet = true;
                   sheetProtection.Objects = true;
                   sheetProtection.Scenarios = true;
                   ProtectedRanges pRanges = new ProtectedRanges();
                   ProtectedRange pRange = new ProtectedRange();
                   ListValue<StringValue> lValue = new ListValue<StringValue>();
                   lValue.InnerText = ""; //set cell which you want to make it editable
                   pRange.SequenceOfReferences = lValue;
                   pRange.Name = "not allow editing";
                   pRanges.Append(pRange);
                   sheetPart.Worksheet.InsertBefore(sheetProtection, pageM);
                   sheetPart.Worksheet.InsertBefore(pRanges, pageM);

如果我們希望指定頁面為只讀，則首先按名稱給出條件過濾器，然后給出此代碼。在此代碼中 lValue.InnerText = ""; 為空，所以我們沒有提到細胞有權克服這種保護。 如果我們提到單元格，我們可以編輯到該限制。