Send ExcelPackage file to user - asp.net

Question

I want to build ExcelPackage file on server side and than send allow user to download it.
Here is my code for file creating:
private byte[] ExcelFileCreate()
{
using (var excelPackage = new ExcelPackage())
{
excelPackage.Workbook.Properties.Author = User.Identity.Name;
excelPackage.Workbook.Properties.Title = "Skybot";
excelPackage.Workbook.Properties.Company = "Dataminds";
excelPackage.Workbook.Worksheets.Add("Selected unit folder");
var excelWorksheet = excelPackage.Workbook.Worksheets[1];
excelWorksheet.Name = "Selected unit folder";
int rowIndex = 1;
int columnIndex = 1;
do
{
var cell = excelWorksheet.Cells[rowIndex, columnIndex];
var fill = cell.Style.Fill;
fill.PatternType = ExcelFillStyle.Solid;
fill.BackgroundColor.SetColor(Color.LightGray);
columnIndex++;
} while (columnIndex != 4);
excelWorksheet.Cells[1, 1].Value = "action cell";
excelWorksheet.Cells[1, 2].Value = "time cell";
excelWorksheet.Cells[1, 3].Value = "processor cell";
excelWorksheet.Cells[2, 1].Value = "action cell";
excelWorksheet.Cells[2, 2].Value = "time cell";
excelWorksheet.Cells[2, 3].Value = "processor cell";
return excelPackage.GetAsByteArray();
}
}
And send it you user:
variant 1:
private void FileTransfer(byte[] fileBytes)
{
//Clear the response
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.Cookies.Clear();
//Add the header & other information
Response.Cache.SetCacheability(HttpCacheability.Private);
Response.CacheControl = "private";
Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
Response.AppendHeader("Content-Length", fileBytes.Length.ToString());
Response.AppendHeader("Pragma", "cache");
Response.AppendHeader("Expires", "60");
Response.AppendHeader("Content-Disposition",
"attachment; " +
"filename=\"ExcelReport.xlsx\"; " +
"size=" + fileBytes.Length.ToString() + "; " +
"creation-date=" + DateTime.Now.ToString("R") + "; " +
"modification-date=" + DateTime.Now.ToString("R") + "; " +
"read-date=" + DateTime.Now.ToString("R"));
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
//Write it back to the client
Response.BinaryWrite(fileBytes);
Response.End();
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("content-disposition", "attachment;filename=test.xlsx");
Response.BinaryWrite(fileBytes);
Response.End();
}
variant 2:
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("content-disposition", "attachment;filename=test.xlsx");
Response.BinaryWrite(fileBytes);
Response.End();
variant 3:
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", fileBytes));
Response.AppendHeader("Content-Length", fileBytes.Length.ToString());
Response.BinaryWrite(fileBytes);
Response.End();
And none of them works.
There is no pop-up window with suggestion to store/open file.
Event handler that should make it works:
protected void TreeViewUnit_OnContextMenuItemClick(object sender,
RadTreeViewContextMenuEventArgs eventArgs)
{
FileTransfer(ExcelFileCreate());
}
Any ideas what is wrong?

Answer 1

Try
Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("content-disposition", "attachment; filename=ExcelReport.xlsx");
Response.BinaryWrite(fileBytes);
Response.End();
It works for me as shown here.