Question

我正在尝试将一些信息写入excel文件。我可以使用EPPlus在其中写入数据。并下载excel文件。但是当我运行并下载此文件并打开时，我看到了这个错误。

＆＃34; Excel在filename.xls中找到了不可读的内容。你想恢复这个工作簿的内容吗？如果您信任此工作簿的来源，请单击是。＆＃34;

即使我没有写任何文件，我也收到了这个错误。我在Excel类中的代码是：

using MaasRaporlari.Models;
using OfficeOpenXml;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;

namespace MaasRaporlari.Controllers
{
    class AyrintiliHarcamaRapor
    {
        public List<AyrintiliHarcamaProgramiVM2> Ayrintili;

        private static int RaporaEklenebilecekIcerikSayısı = 33;

        public string ExcelTemplatePath { get; set; } // = HostingEnvironment.MapPath(Url.Content("~/Content/Xsl/")); //@"C:\test\OdemeEmriBelgesi.xlsx";
        public string ExcelResultPath { get; set; } // = @"C:\test\OdemeEmriSonuc.xlsx";
        public FileStream Save()
        {
            try
            {
                ExcelTemplatePath = HttpContext.Current.Server.MapPath("~/Images/AyrintiliHarcamaProgrami.xlsx");
                ExcelResultPath = HttpContext.Current.Server.MapPath("~/Images/Harcama.xls");
                var File = new FileInfo(ExcelTemplatePath);
                using (ExcelPackage package = new ExcelPackage(File))
                {
                    package.Load(new FileStream(ExcelTemplatePath, FileMode.Open));
                    int sheetCount = (int)Math.Ceiling((double)Ayrintili.Count / RaporaEklenebilecekIcerikSayısı);
                    ExcelWorksheet workSheet = package.Workbook.Worksheets["Sheet1"];
                    List<ExcelWorksheet> workSheets = new List<ExcelWorksheet>();
                    workSheets.Add(workSheet);
                    package.Stream.Position = 0;
                    if (sheetCount >= 2)
                    {
                        for (int i = 0; i < sheetCount - 1; i++)
                        {
                            ExcelWorksheet tempSheet = package.Workbook.Worksheets.Add(string.Format("Sheet{0}", i + 2), workSheet);
                            workSheets.Add(tempSheet);
                        }
                    }

                    int icerikSayac = 0;
                    foreach (ExcelWorksheet workSheetItem in workSheets)
                    {
                        package.Stream.Position = 0;
                        decimal MiktarToplam1 = 0;
                        decimal MiktarToplam2 = 0;
                        decimal MiktarToplam3 = 0;
                        decimal MiktarToplam4 = 0;
                        decimal MiktarToplam5 = 0;
                        decimal OranToplam1 = 0;
                        decimal OranToplam2 = 0;
                        decimal OranToplam3 = 0;
                        decimal OranToplam4 = 0;
                        decimal OranToplam5 = 0;

                        MiktarToplam Toplam = new MiktarToplam();

                        int rowPointer = 10;

                        for (int i = 0; i < RaporaEklenebilecekIcerikSayısı; i++)
                        {
                            if (icerikSayac < Ayrintili.Count)
                            {
                                var item = Ayrintili[icerikSayac];

                                package.Stream.Position = 0;

                                MiktarToplam5 = item.Miktar1 + item.Miktar2 + item.Miktar3 + item.Miktar4;
                                OranToplam5 = item.Oran1 + item.Oran2 + item.Oran3 + item.Oran4;

                                MiktarToplam1 += item.Miktar1;
                                MiktarToplam2 += item.Miktar2;
                                MiktarToplam3 += item.Miktar3;
                                MiktarToplam4 += item.Miktar4;

                                OranToplam1 += item.Oran1;
                                OranToplam2 += item.Oran2;
                                OranToplam3 += item.Oran3;
                                OranToplam4 += item.Oran4;


                                workSheetItem.Cells["A" + rowPointer.ToString()].Value = item.One;
                                workSheetItem.Cells["B" + rowPointer.ToString()].Value = item.Two;
                                workSheetItem.Cells["C" + rowPointer.ToString()].Value = item.Aciklama;
                                workSheetItem.Cells["D" + rowPointer.ToString()].Value = item.Miktar1;
                                workSheetItem.Cells["F" + rowPointer.ToString()].Value = item.Miktar2;
                                workSheetItem.Cells["H" + rowPointer.ToString()].Value = item.Miktar3;
                                workSheetItem.Cells["J" + rowPointer.ToString()].Value = item.Miktar4;
                                workSheetItem.Cells["E" + rowPointer.ToString()].Value = item.Oran1;
                                workSheetItem.Cells["G" + rowPointer.ToString()].Value = item.Oran2;
                                workSheetItem.Cells["I" + rowPointer.ToString()].Value = item.Oran3;
                                workSheetItem.Cells["K" + rowPointer.ToString()].Value = item.Oran4;
                                workSheetItem.Cells["AC" + rowPointer.ToString()].Value = MiktarToplam5;
                                workSheetItem.Cells["AD" + rowPointer.ToString()].Value = OranToplam5;

                                rowPointer++;
                                icerikSayac++;

                            }
                        }


                        workSheetItem.Cells["D33"].Value = MiktarToplam1;
                        workSheetItem.Cells["E33"].Value = OranToplam1;
                        workSheetItem.Cells["F33"].Value = MiktarToplam2;
                        workSheetItem.Cells["G33"].Value = OranToplam2;
                        workSheetItem.Cells["H33"].Value = MiktarToplam3;
                        workSheetItem.Cells["I33"].Value = OranToplam3;
                        workSheetItem.Cells["J33"].Value = MiktarToplam4;
                        workSheetItem.Cells["K33"].Value = OranToplam4;

                    }
                    using (FileStream outStream = new FileStream(ExcelResultPath, FileMode.OpenOrCreate, FileAccess.ReadWrite))
                    {
                        package.Stream.Position = 0;

                        package.SaveAs(outStream);
                        outStream.Position = 0;
                        package.Stream.Dispose();


                        return (outStream);
                    }

                }

            }


            catch (Exception)
            {
                throw;

            }
        }
        public class MiktarToplam
        {
            public decimal Toplam { get; set; }

            public MiktarToplam()
            {
                Toplam = 0;

            }
        }
    }
}

Answer 1

Epplus是Excel的旧工具。如果你看一点，你可以看到很多更好的工具。你应该仔细研究。此外，您应该查看这些工具的网站。最后一次提交或更新是什么时候？ NPOI和GemBox是最好的工具之一。祝你好运。

Answer 2

只是几个简单的问题：

是否有必要将文件放在ExcelPackage构造函数中然后加载它（package.Load）？

为什么在第34行设置package.Stream.Postision = 0并再次在第69行设置？

我在我的解决方案中这样做（wb是工作簿）：

 var ms = new MemoryStream();
 wb.SaveAs(ms);
 ms.Seek(0, SeekOrigin.Begin);

您是否尝试过保存到文件（只是为了确保一切正常）。

MVC 5 Epplus Excel发现不可读的内容

2 个答案: