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

您可以使用package.Save()而不是使用package.GetAsByteArray()，它将返回一个字节数组，然后您可以使用FileResult或FileContentResult从MVC操作中流式传输以触发文件下载。此方法允许您先下载文件而不将其保存到服务器。

Answer 3

以下是下载文件的示例操作。您可以根据自己的要求随意修改。

public FileActionResult DownloadMyFile()
{
    var filePath = "C:\ExcelDataTest\ExcellData.xlsx";
    var fileName = "ExcellData.xlsx";
    var mimeType = "application/vnd.ms-excel";
    return File(new FileStream(filePath, FileMode.Open),mimeType, fileName);
}

Answer 4

您可以这样做：

excel.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(excel.GetAsByteArray());

有关详细博客：http://sforsuresh.in/generating-and-formatting-excelsheet-in-c-using-epplus/

使用EPPlus创建后下载Excel文件

4 个答案: