问题
Question: What is an alternative to the last three lines of the following code in ASP.NET Core 1.1 and/or what are workarounds? On these last three lines VS2015
is complaining HttpResponse does not contain a definition for OutputStream, Flush(), End()
Background: In my ASP.NET Core 1.1
app I'm using 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), but VS2015
is not recognizing the last 3 lines
of this code.
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();
}
}
回答1:
You can return one of FileStreamResult in Controller action.
It returns a file in the specified fileStream with the specified contentType as the Content-Type and the specified fileDownloadName as the suggested file name.
public virtual FileStreamResult File(Stream fileStream, string contentType, string fileDownloadName)
EDIT:
Sample action method-
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");
Generated Excel screenshot-
来源:https://stackoverflow.com/questions/44345788/creating-an-excel-file-on-the-fly-and-have-it-download-save-on-the-client