创建2007/2010 Excel文件并保存到服务器

Question

我使用EPPlus包从数据表导出Excel 2007文件，但我想保存我在服务器上创建的Excel文件。我正在使用这种方法：

private string SaveExcelFile(DataTable dt)
        {
            string reportName = DateTime.Now.ToString("dd-MM-yyyy-HH-mm-ss-fff") + ".xlsx";

           Response.Clear();
           Response.Charset = "";
           Response.ContentEncoding = System.Text.Encoding.UTF8;
           Response.Cache.SetCacheability(HttpCacheability.NoCache);
           Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
           Response.AddHeader("content-disposition", "attachment;filename=\"" + reportName + "\"");

           using(ExcelPackage pck = new ExcelPackage())
           {
             ExcelWorksheet wsDt = pck.Workbook.Worksheets.Add("Sheet1");
             wsDt.Cells["A1"].LoadFromDataTable(dt, true, TableStyles.None);
             wsDt.Cells[wsDt.Dimension.Address].AutoFitColumns();

             //Response.BinaryWrite(pck.GetAsByteArray());
             string filePhysicalPath = Server.MapPath("~/Uploads/PeriodsReports/" + reportName);
             System.IO.File.WriteAllBytes(filePhysicalPath, pck.GetAsByteArray());
           }

           Response.Flush();
           Response.End();

           return reportName;
        }

Excel保存后，我收到此错误：

Excel无法打开文件，因为文件格式或文件扩展名无效

Answer 1

你不能使用WriteAllText作为二进制文件。（和excel是二进制文件）试试这个

System.IO.File.WriteAllBytes(filePhysicalPath, pck.GetAsByteArray());