下载Excel文件

Question

我之前曾问过这个问题，但在启动文件下载时仍然遇到困难。

var fileName = "ExcelData.xlsx";
var file = new FileInfo(fileName);
using (var package = new OfficeOpenXml.ExcelPackage(file))
{
   var worksheet = package.Workbook.Worksheets.FirstOrDefault(x => x.Name == "Employee Data");
   if (package.Workbook.Worksheets.FirstOrDefault(x => x.Name == "Employee Data") == null)
   {
       worksheet = package.Workbook.Worksheets.Add("Employee Data");
   }
   else
   {
       package.Workbook.Worksheets.Delete(1);
       worksheet = package.Workbook.Worksheets.Add("Employee Data");
    }
     worksheet.Cells[1, 1].Value = "Date start";
     worksheet.Cells[1, 2].Value = "Name";

     var rowCounter = 2;
      foreach (var v in users)
      {
         string dt = v.DateAdded.ToString();
         worksheet.Cells[rowCounter, 1].Value = dt;
         worksheet.Cells[rowCounter, 2].Value = v.Name;
         rowCounter++;
      }
      package.Workbook.Properties.Title = "Employee Data";

      System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
      response.Clear();
      response.Buffer = true;
      response.Charset = "";
      response.ContentType = "application/vnd.openxmlformats-     officedocument.spreadsheetml.sheet";
      response.AddHeader("content-disposition", "attachment;filename=ExcelData.xlsx");
      response.BinaryWrite(package.GetAsByteArray());
}

目前，没有错误发生，但下载也未触发。如何触发下载，以便将生成的文件保存到默认下载文件夹

Answer 1

你为什么不退还FileContentResult？

由于您使用的Excel库可以将工作表作为字节数组返回，因此这可能对您有用。

在您的控制器中，您可以这样返回FileContentResult：

return File(package.GetAsByteArray(), "application/xlsx", "YourReportName.xlsx");

因此，您可以从代码中删除此代码块：

System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
  response.Clear();
  response.Buffer = true;
  response.Charset = "";
  response.ContentType = "application/vnd.openxmlformats-     officedocument.spreadsheetml.sheet";
  response.AddHeader("content-disposition", "attachment;filename=ExcelData.xlsx");
  response.BinaryWrite(package.GetAsByteArray());

并如上所示返回文件。

请注意，您必须在的控制器中添加using语句System.Web.Mvc。