使用EPPlus创建后下载Excel文件

Question

我正在使用EPPlus库生成一个excel文件,我成功保存在服务器上的文件夹中.

如何将此文件下载到我的本地计算机？

这是我的代码

public void CreateExcelFirstTemplate()
{   
   var fileName = "C:\ExcelDataTest\ExcellData.xlsx";
   var file = new FileInfo(fileName);
   using (var package = new OfficeOpenXml.ExcelPackage(file))
   {
      var worksheet = package.Workbook.Worksheets.FirstOrDefault(x => x.Name == "Attempts");
      worksheet = package.Workbook.Worksheets.Add("Assessment Attempts");
      worksheet.Row(1).Height = 20;

      worksheet.TabColor = Color.Gold;
      worksheet.DefaultRowHeight = 12;
      worksheet.Row(1).Height = 20;

      worksheet.Cells[1, 1].Value = "Employee Number";
      worksheet.Cells[1, 2].Value = "Course Code";

      var cells = worksheet.Cells["A1:J1"];
      var rowCounter = 2;
      foreach (var v in userAssessmentsData)
      {
        worksheet.Cells[rowCounter, 1].Value = v.CompanyNumber;
        worksheet.Cells[rowCounter, 2].Value = v.CourseCode;

        rowCounter++;
      }
      worksheet.Column(1).AutoFit();
      worksheet.Column(2).AutoFit();


      package.Workbook.Properties.Title = "Attempts";
      package.Save();
  }
}

Answer 1

如果要在每个请求上生成此文件,则无需将其保存在服务器上:

public void CreateExcelFirstTemplate()
{
       var fileName = "ExcellData.xlsx";
       using (var package = new OfficeOpenXml.ExcelPackage(fileName))
       {
          var worksheet = package.Workbook.Worksheets.FirstOrDefault(x => x.Name == "Attempts");
          worksheet = package.Workbook.Worksheets.Add("Assessment Attempts");
          worksheet.Row(1).Height = 20;

          worksheet.TabColor = Color.Gold;
          worksheet.DefaultRowHeight = 12;
          worksheet.Row(1).Height = 20;

          worksheet.Cells[1, 1].Value = "Employee Number";
          worksheet.Cells[1, 2].Value = "Course Code";

          var cells = worksheet.Cells["A1:J1"];
          var rowCounter = 2;
          foreach (var v in userAssessmentsData)
          {
            worksheet.Cells[rowCounter, 1].Value = v.CompanyNumber;
            worksheet.Cells[rowCounter, 2].Value = v.CourseCode;

            rowCounter++;
          }
          worksheet.Column(1).AutoFit();
          worksheet.Column(2).AutoFit();


          package.Workbook.Properties.Title = "Attempts";
          this.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
          this.Response.AddHeader(
                    "content-disposition",
                    string.Format("attachment;  filename={0}", "ExcellData.xlsx"));
          this.Response.BinaryWrite(package.GetAsByteArray());
      }
}         

Answer 2

而不是使用package.Save()你可以使用package.GetAsByteArray()哪个将返回一个字节数组,然后您可以使用FileResult或FileContentResult从MVC操作流来触发文件下载.此方法允许您先下载文件而不将其保存到服务器.