使用 OpenXML 导出时文件已损坏且无法打开

Question

我正在使用以下函数导出数据，方法是在内存流中创建 excel sheet，使用从数据库检索的数据。每当导出文件时，它都会显示已损坏。

      private void ExportObjectToExcel(List<ExcelData> excelData, System.Web.HttpResponse Response)//string destination)
        {
            string[] columns = { "Barcode", "Client", "Content_Owner", "IsClientVisible", 
                   "Material_Type", "Client_Barcode", "MaterialId","Standard",
                   "Class", //"Subtitle_Language", "Subtitle_Type", 
                   "Title_Name",
                   "Language", "StartOfMessage", "EndOfMessage", "StartOfRecording",
                   "EndOfRecording", "Audio Channels"};
            MemoryStream memoryStream = new MemoryStream();
            string filename = "ETMetaData.xlsx";
          //  using (var workbook = SpreadsheetDocument.Create(destination, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
            using (var workbook = SpreadsheetDocument.Create(memoryStream, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook,true))
            {
                var workbookPart = workbook.AddWorkbookPart();
                workbook.WorkbookPart.Workbook = new Workbook();
                workbook.WorkbookPart.Workbook.Sheets = new Sheets();


                var sheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>();
                var sheetData = new SheetData();
                sheetPart.Worksheet = new Worksheet(sheetData);

                Sheets sheets = workbook.WorkbookPart.Workbook.GetFirstChild<Sheets>();
                string relationshipId = workbook.WorkbookPart.GetIdOfPart(sheetPart);
                AddStyle(workbookPart, relationshipId);
                uint sheetId = 1;
                if (sheets.Elements<Sheet>().Count() > 0)
                {
            sheetId =
                sheets.Elements<Sheet>().Select(s => s.SheetId.Value).Max() + 1;
                }

                Sheet sheet = new Sheet() { Id = relationshipId, SheetId = sheetId, Name = "Element Profiles" };
                sheets.Append(sheet);

                Row headerRow = new Row();

                foreach (var column in columns)
                {
            Cell cell = new Cell();
            cell.DataType = CellValues.String;
            cell.CellValue = new CellValue(column);
            headerRow.AppendChild(cell);
                }

                sheetData.AppendChild(headerRow);

                foreach (ExcelData data in excelData)
                {
            int i = 0;
            Row newRow = new Row();
            CreateCellForValue(columns[0], data.Barcode, newRow);
            CreateCellForValue(columns[1], data.Client, newRow);
            CreateCellForValue(columns[2], data.Content_Owner, newRow);
            CreateCellForValue(columns[3], data.IsClientVisible.ToString(), newRow);
            CreateCellForValue(columns[4], data.Material_Type, newRow);
            CreateCellForValue(columns[5], data.Client_Barcode, newRow);
            CreateCellForValue(columns[6], data.MaterialId, newRow);
            CreateCellForValue(columns[7], data.Standard, newRow);
            CreateCellForValue(columns[8], data.Class, newRow);
            //CreateCellForValue(columns[9], data.Subtitle_Language, newRow);
            //CreateCellForValue(columns[10], data.Subtitle_Type, newRow);
            CreateCellForValue(columns[9], data.Title_Name, newRow);
            CreateCellForValue(columns[10], data.Language, newRow);
            if (data.TimecodeItem != null)
            {
                CreateCellForValue(columns[11], data.TimecodeItem[i].StartOfMessage, newRow);
                CreateCellForValue(columns[12], data.TimecodeItem[i].EndOfMessage, newRow);
                CreateCellForValue(columns[13], data.TimecodeItem[i].StartOfRecording, newRow);
                CreateCellForValue(columns[14], data.TimecodeItem[i].EndOfRecording, newRow);
            }
            else
            {
                CreateCellForValue(columns[11], string.Empty, newRow);
                CreateCellForValue(columns[12], string.Empty, newRow);
                CreateCellForValue(columns[13], string.Empty, newRow);
                CreateCellForValue(columns[14], string.Empty, newRow);
            }
            CreateCellForValue(columns[15], ((data.AudioChannels != null) ? string.Join("|", data.AudioChannels.Select(x => x.ToString())) : ""), newRow);
            //CreateCellForValue(columns[18], data., newRow);
            //  i++;
            sheetData.AppendChild(newRow);
                }            
            }
            memoryStream.Flush();
            memoryStream.Position = 0;

            Response.ClearContent();
            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "";

            //  NOTE: If you get an "HttpCacheability does not exist" error on the following line, make sure you have
            //  manually added System.Web to this project's References.

            Response.Cache.SetCacheability(System.Web.HttpCacheability.NoCache);
            Response.AddHeader("content-disposition", "attachment; filename=" + filename);
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            byte[] data1 = new byte[memoryStream.Length];
            memoryStream.Read(data1, 0, data1.Length);
            memoryStream.Close();
            Response.BinaryWrite(data1);
            Response.Flush();

            //  Feb2015: Needed to replace "Response.End();" with the following 3 lines, to make sure the Excel was fully written to the Response
            System.Web.HttpContext.Current.Response.Flush();
            System.Web.HttpContext.Current.Response.SuppressContent = true;
            System.Web.HttpContext.Current.ApplicationInstance.CompleteRequest();
        }

     private void CreateCellForValue(string column, string columnValue, Row newRow, bool isLock=false)
            {
                Cell cell = new Cell();
                cell.DataType = CellValues.String;
                cell.CellValue = new CellValue(columnValue);
                if (isLock)
                    cell.StyleIndex = 0;
                newRow.AppendChild(cell);
            }

      private string GetCellValue(SpreadsheetDocument doc, Cell cell)
            {
                if (cell == null || cell.CellValue == null)
                    return null;

                string value = cell.CellValue.InnerText;
                if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
                {
                    return doc.WorkbookPart.SharedStringTablePart.SharedStringTable.ChildElements.GetItem(int.Parse(value)).InnerText;
                }
                return value;
            }

 private void AddStyle(WorkbookPart workbookPart, string id)
        {
            CellFormat lockFormat = new CellFormat() { ApplyProtection = true, Protection = new Protection() { Locked = true } };
            WorkbookStylesPart sp = workbookPart.GetPartsOfType<WorkbookStylesPart>().FirstOrDefault();

            if (sp == null)
                sp = workbookPart.AddNewPart<WorkbookStylesPart>();
            sp.Stylesheet = new Stylesheet();
            sp.Stylesheet.CellFormats = new CellFormats();
            sp.Stylesheet.CellFormats.AppendChild<CellFormat>(lockFormat);
            sp.Stylesheet.CellFormats.Count = UInt32Value.FromUInt32((uint)sp.Stylesheet.CellFormats.ChildElements.Count);
            sp.Stylesheet.Save();
        }

求推荐。

Answer 1

拉胡尔，我使用了您的代码并将 Excel 数据保存到本地 Excel 文件。我已确认该文件已损坏。当我在 Excel2016 中打开文件时，它指向 Styles 部分已损坏 - 参见图片：

我注释掉了您的 AddStyle 方法，并将其替换为由 Open XML Productivity Tool 创建的另一种方法，并且有效。在此处查看文件：

我有saved this code to GitHub and you can inspect it there。有一个包装 WPF 应用程序要求您提供文件名，然后保存该文件。有一些模拟的 ExcelData（2 行）会生成一些丢弃的数据。

如果您没有 Excel 2016，此工具可以帮助您显示打开 XML 文件中的错误。只需打开任何打开 XML 文件并单击验证按钮。

使用 OpenXML 导出时文件已损坏且无法打开

File is corrupt and cannot be opened, when exporting using OpenXML

c#

asp.net

openxml