使用EPPlus创建后下载Excel文件

I am using the EPPlus library to generate an excel file which I successfully save in a folder on the server.

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一个文件夹中。

How can download this file to my local machine?

如何将此文件下载到我的本地计算机?

This is my code

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();
  }
}

3 个解决方案

#1

If you are generating this file on each request you don't need to save it on the server:

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());
      }
}

#2

Instead of using package.Save() you can use package.GetAsByteArray() which will return a byte array which you can then stream using FileResult or FileContentResult from the MVC action to trigger a file download. This method will allow you to download the file without saving it to the server first.

您可以使用package.GetAsByteArray()来返回一个字节数组,然后使用FileResult或来自MVC操作的FileContentResult来触发文件下载,而不是使用package.Save()。此方法允许您先下载文件而不将其保存到服务器。

#3

Here is sample action to download file. Feel free to modify it as per your requirement.

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);
}

#1