即时创建 Excel 文件并在客户端上拥有它 download/save

Question

问题：ASP.NET Core 1.1 and/or 中以下代码的最后三行的替代方法是什么 and/or 解决方法是什么？在最后三行中 VS2015 抱怨 HttpResponse does not contain a definition for OutputStream, Flush(), End()

背景：在我的 ASP.NET Core 1.1 应用程序中，我正在使用 EPPlus.Core to export data on the fly to Excel and have it downloaded/save on the client side. As a starter, I'm trying to mimic the following example (taken from here)，但 VS2015 无法识别 last 3 lines 这段代码。

public void ExportListUsingEPPlus()
{
    var data = new[]{
                        new{ Name="Ram", Email="ram@techbrij.com", Phone="111-222-3333" },
                        new{ Name="Shyam", Email="shyam@techbrij.com", Phone="159-222-1596" },
                        new{ Name="Mohan", Email="mohan@techbrij.com", Phone="456-222-4569" },
                        new{ Name="Sohan", Email="sohan@techbrij.com", Phone="789-456-3333" },
                        new{ Name="Karan", Email="karan@techbrij.com", Phone="111-222-1234" },
                        new{ Name="Brij", Email="brij@techbrij.com", Phone="111-222-3333" }
                };

    ExcelPackage excel = new ExcelPackage();
    var workSheet = excel.Workbook.Worksheets.Add("Sheet1");
    workSheet.Cells[1, 1].LoadFromCollection(data, true);
    using (var memoryStream = new MemoryStream())
    {
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.Headers.Add("content-disposition", "attachment;  filename=Contact.xlsx");
        excel.SaveAs(memoryStream);
        memoryStream.WriteTo(Response.OutputStream);
        Response.Flush();
        Response.End();
    }
}

Answer 1

您可以在控制器操作中 return FileStreamResult 之一。

它return是指定 fileStream 中的一个文件，指定的 contentType 作为 Content-Type，指定的 fileDownloadName 作为建议的文件名。

public virtual FileStreamResult File(Stream fileStream, string contentType, string fileDownloadName)

编辑：

示例操作方法-

var data = new[]{
                        new{ Name="Ram", Email="ram@techbrij.com", Phone="111-222-3333" },
                        new{ Name="Shyam", Email="shyam@techbrij.com", Phone="159-222-1596" },
                        new{ Name="Mohan", Email="mohan@techbrij.com", Phone="456-222-4569" },
                        new{ Name="Sohan", Email="sohan@techbrij.com", Phone="789-456-3333" },
                        new{ Name="Karan", Email="karan@techbrij.com", Phone="111-222-1234" },
                        new{ Name="Brij", Email="brij@techbrij.com", Phone="111-222-3333" }
                };

            ExcelPackage excel = new ExcelPackage();
            var workSheet = excel.Workbook.Worksheets.Add("Sheet1");
            workSheet.Cells[1, 1].LoadFromCollection(data, true);

            //var memoryStream = new MemoryStream(excel.GetAsByteArray());

            //Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            //Response.Headers.Add("content-disposition", "attachment;  filename=Contact.xlsx");
            //excel.SaveAs(memoryStream);
            //memoryStream.WriteTo(Response.OutputStream);
            //Response.Flush();
            //Response.End();

            return File(excel.GetAsByteArray(), "application/vnd.ms-excel", "Contact.xlsx");

已生成 Excel 屏幕截图-

即时创建 Excel 文件并在客户端上拥有它 download/save

Creating an Excel file on the fly and have it download/save on the client

c#

export-to-excel

epplus

asp.net-core