将对象导出到.xlsx到客户机asp.net核心

Question

我目前正在将对象导出到.xlsx文件中。这是我所需要的，Export xlsx in ASP.NET Core，但问题是 - 这是导出到本地项目文件夹wwwroot，我想导出到客户端机器。

我试过这个。

   private readonly IHostingEnvironment _hostingEnvironment;

    public ImportExportController(IHostingEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    [HttpGet]
    [Route("Export")]
    public FileStreamResult Export()
    {
        string sWebRootFolder = _hostingEnvironment.WebRootPath;
        string sFileName = @"demo.xlsx";
        string URL = string.Format("{0}://{1}/{2}", Request.Scheme, Request.Host, sFileName);
        FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
        if (file.Exists)
        {
            file.Delete();
            file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));
        }
        using (ExcelPackage package = new ExcelPackage(file))
        {
            // add a new worksheet to the empty workbook
            ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Employee");
            //First add the headers
            worksheet.Cells[1, 1].Value = "ID";
            worksheet.Cells[1, 2].Value = "Name";
            worksheet.Cells[1, 3].Value = "Gender";
            worksheet.Cells[1, 4].Value = "Salary (in $)";

            //Add values
            worksheet.Cells["A2"].Value = 1000;
            worksheet.Cells["B2"].Value = "Jon";
            worksheet.Cells["C2"].Value = "M";
            worksheet.Cells["D2"].Value = 5000;

            worksheet.Cells["A3"].Value = 1001;
            worksheet.Cells["B3"].Value = "Graham";
            worksheet.Cells["C3"].Value = "M";
            worksheet.Cells["D3"].Value = 10000;

            worksheet.Cells["A4"].Value = 1002;
            worksheet.Cells["B4"].Value = "Jenny";
            worksheet.Cells["C4"].Value = "F";
            worksheet.Cells["D4"].Value = 5000;

            package.Save(); //Save the workbook.
        }


        FileStream RptStream = new FileStream(Path.Combine(sWebRootFolder, sFileName), FileMode.Open, FileAccess.Read);
        return new FileStreamResult(RptStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    }

但似乎我需要将工作表导出到wwwroot文件夹，然后再使用工作表URL返回filestreamresult。我不知道如何获取工作表的url传递filestreamresult函数。

有人可以帮帮我吗？我想在客户端计算机上导出此.xlsx而不是wwwroot。

Answer 1

尝试将文件写入内存流并让您的方法返回FileContentResult对象（通过Controller.File方法）：

var stream = new MemoryStream(package.GetAsByteArray());
return File(stream.ToArray(), "application/vnd.ms-excel", sFileName);