NPOI Excel文件下载损坏

我正在尝试使用NPOI，angular2和web API将数据从数据表导出为ex​​cel。 我所遵循的步骤是：1.将数据表中的数据写入XLSX，并将该文件临时存储在服务器上。2.将其读取并写入内存stream并返回。 我看到浏览器提示用户下载文件，一旦文件正在下载，我得到一个错误，说该文件已损坏。 但是当第一步打开服务器上的文件时，文件打开完全正常，通过文件浏览器下载后打开文件也可以正常工作。 你能帮我理解为什么这是在下载后从浏览器打开文件时发生的吗？

web api代码：

public HttpResponseMessage ExportReport(ReportPostModel ReportModel) { try { var dt = _IReportRepositoryObj.ExportToExcel(ReportModel.CommentsToExport, ReportModel.SelectedColumns); var headers = dt.Columns.Cast<DataColumn>().Select(x => x.ColumnName).ToArray(); ICellStyle cellStyle; XSSFWorkbook workbook = new XSSFWorkbook(); cellStyle = workbook.CreateCellStyle(); XSSFFont hFont = (XSSFFont)workbook.CreateFont(); hFont.FontHeightInPoints = 12; hFont.FontName = "Arial"; hFont.Boldweight = (short)NPOI.SS.UserModel.FontBoldWeight.Bold; cellStyle.SetFont(hFont); var sheet = workbook.CreateSheet("sheet1"); var headerRow = sheet.CreateRow(0); //Create header row for (int i = 0; i < headers.Length; i++) { ICell cell = headerRow.CreateCell(i); cell.SetCellValue(headers[i].ToString()); } //dump data into the excel for (int i = 0; i < dt.Rows.Count; i++) { IRow row = sheet.CreateRow(i + 1); for (int j = 0; j < dt.Columns.Count; j++) { ICell cell = row.CreateCell(j); cell.SetCellValue(dt.Rows[i][headers[j]].ToString()); } } string fileName = "temp" + DateTime.Now.ToString("yyyyMMddHHmmssfff")+ ".xlsx"; string filePath = System.Web.HttpContext.Current.Server.MapPath("~/Temp/"); filePath += fileName; using (FileStream FWriteStream = new FileStream(filePath, FileMode.Create, FileAccess.Write)) { workbook.Write(FWriteStream); } //write excel into memory stream using (var exportData = new MemoryStream()) { using (FileStream FreadStream = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { byte[] bytes = new byte[FreadStream.Length]; FreadStream.Read(bytes, 0, (int)FreadStream.Length); FreadStream.Seek(0, SeekOrigin.Begin); exportData.Write(bytes, 0, (int)FreadStream.Length); HttpResponseMessage message = new HttpResponseMessage(); message.Content = new ByteArrayContent(bytes.ToArray()); message.Content.Headers.Add("x-filename", "temp.xlsx"); message.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); message.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment"); message.Content.Headers.ContentDisposition.FileName = "temp.xlsx"; message.StatusCode = HttpStatusCode.OK; return message; } } } catch (Exception ex) { throw ex; } } angular service code: ExportReport(CommentSpecificationModel: any, SelectedColumns: any) { return Observable.create((observer: any) => { debugger; let req = new XMLHttpRequest(); req.open('POST', apiBaseUrl ; let ReportModel = { "CommentsToExport" : CommentSpecificationModel, "SelectedColumns" : SelectedColumns } req.setRequestHeader("Content-Type", "application/json"); req.withCredentials = true; req.responseType = "blob"; req.onreadystatechange = function () { if (req.readyState == 4 && req.status == 200) { debugger; var contentType = req.getResponseHeader("content-type"); var blob = new Blob([req.response], { type: contentType }); observer.next(blob); observer.complete(); } }; req.send(JSON.stringify(ReportModel)); }); } 

angular度组件代码：

 ExportDatatoExcel() { debugger; this.reportService.ExportSpecificationCommentReport(this.SpecificationCommentsModel, this.SelectedColumns). subscribe((data: any) => { debugger; var link = document.createElement('a'); link.href = window.URL.createObjectURL(data); link.download = "Export.xlsx"; link.click(); } ); } 

编辑：

我发现在我使用的代码中没有任何错误，问题是在chrome上安装了mcAfee端点安全性。 我怎样才能使我的下载与安全软件兼容？

Answer 1

好了之后，我可以通过在Chrome上禁用Mcaffee插件来获得excel下载的工作。