Download file with ClosedXML

Question

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How can I download a file so the user sees that it is downloading (like with a stream?)

I am currently using ClosedXML, but if I use the SaveAs method, I

Answer 1

The SaveAs() method supports stream, so to get the ClosedXml workbook as a stream I use:

public Stream GetStream(XLWorkbook excelWorkbook)
{
    Stream fs = new MemoryStream();
    excelWorkbook.SaveAs(fs);
    fs.Position = 0;
    return fs;
}

And then for downloading the file:

string myName = Server.UrlEncode(ReportName + "_" + DateTime.Now.ToShortDateString() + ".xlsx");
MemoryStream stream = GetStream(ExcelWorkbook);

Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=" + myName);
Response.ContentType = "application/vnd.ms-excel";
Response.BinaryWrite(stream.ToArray());
Response.End();

Answer 2

public ActionResult SendFile()
{
    // Create the workbook
    XLWorkbook workbook = new XLWorkbook();
    workbook.Worksheets.Add("Sample").Cell(1, 1).SetValue("Hello World");

    // Send the file
    MemoryStream excelStream = new MemoryStream();
    workbook.SaveAs(excelStream);
    excelStream.Position = 0;
    return File(excelStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "MyFileName.xlsx");
}

Answer 3

If you are using MVC just use the File() method as follows:

using (XLWorkbook wb = new XLWorkbook())
 {
  //here you put your data in the WorkBook
  //then create a Memory Stream object
using (MemoryStream stream = new MemoryStream())
  {
   //save the workbook as a MemoryStream
     wb.SaveAs(stream);

   //use the File method to return a File
   return File(stream.ToArray(), "filetype","fileName.extension");
   }
 }

Answer 4

The download can be done somewhat simpler and shorter, so the complete action in your controller could look like this - the download part is just one line instead of seven to ten

public ActionResult XLSX()
{
    System.IO.Stream spreadsheetStream = new System.IO.MemoryStream();
    XLWorkbook workbook = new XLWorkbook();
    IXLWorksheet worksheet = workbook.Worksheets.Add("example");
    worksheet.Cell(1, 1).SetValue("example");
    workbook.SaveAs(spreadsheetStream);
    spreadsheetStream.Position = 0;

    return new FileStreamResult(spreadsheetStream, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet") { FileDownloadName = "example.xlsx" };
}

Answer 5

Old thread, but I couldn't quite get the accepted solution to work right. Some more searching came up with this, which worked just great for me:

        // Create the workbook
        XLWorkbook workbook = new XLWorkbook();
        workbook.Worksheets.Add("Sample").Cell(1, 1).SetValue("Hello World");

        // Prepare the response
        HttpResponse httpResponse = Response;
        httpResponse.Clear();
        httpResponse.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        httpResponse.AddHeader("content-disposition", "attachment;filename=\"HelloWorld.xlsx\"");

        // Flush the workbook to the Response.OutputStream
        using (MemoryStream memoryStream = new MemoryStream())
        {
            workbook.SaveAs(memoryStream);
            memoryStream.WriteTo(httpResponse.OutputStream);
            memoryStream.Close();
        }

        httpResponse.End();

Answer 6

//Method for Export Excel using Closed Xml
public void ExportDataWithClosedXml_Method(DataTable table, string tabName, string fileType)
{
    var workbook = new XLWorkbook();
    var ws = workbook.Worksheets.Add(table, tabName);
    int row = 2 + table.Rows.Count;
    int col = table.Columns.Count;
    var redRow = ws.Row(1);
    //redRow.Style.Fill.BackgroundColor = XLColor.Red;
    redRow.InsertRowsAbove(1);
    ws.Cell(1, 1).Value = "Name of Report Type";
    ws.Cell(1, 1).Style.Font.Bold = true;
    ws.Table(0).ShowAutoFilter = false;
    //ws.Row(2).Style.Fill.BackgroundColor = XLColor.Red;
    ws.Range(2, 1, 2, col).Style.Fill.BackgroundColor = XLColor.Green;
    ws.Range(2, 1, 2, col).Style.Font.Bold = true;
    ws.Range(3, 1, row, col).Style.Font.Italic = true;

    HttpContext.Current.Response.Clear();
    using (MemoryStream memoryStream = new MemoryStream())
    {
        workbook.SaveAs(memoryStream);
        memoryStream.WriteTo(HttpContext.Current.Response.OutputStream);
        memoryStream.Close();
    }
    if (fileType == "xlsx")
    {
        HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=\"Samplefile.xlsx\"");
    }
    else
    {
        HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=\"Samplefile.xls\"");
    }
    HttpContext.Current.Response.End();
}