Convert excel workbook to byte[]

Question

I have an \"excel library\" workbook and want to convert it to a byte[] so I could return the data with the File method exist in asp.net mvc controller.
There are \"Save\" a

Answer 1

Do you need to convert it to a byte[]? File can also return a stream.

Workbook workbook = new Workbook();
Worksheet worksheet = new Worksheet("First Sheet");
worksheet.Cells[0, 1] = new Cell(9999999);

workbook.Worksheets.Add(worksheet);

MemoryStream m = new MemoryStream();
workbook.SaveToStream(m);

return File(m, "application/vnd.ms-excel");