Create Zip archive from multiple in memory files in C#

Question

Is there a way to create a Zip archive that contains multiple files, when the files are currently in memory? The files I want to save are really just text only and are stor

Answer 1

I was utilizing Cheeso's answer by adding MemoryStreams as the source of the different Excel files. When I downloaded the zip, the files had nothing in them. This could be the way we were getting around trying to create and download a file over AJAX.

To get the contents of the different Excel files to be included in the Zip, I had to add each of the files as a byte[].

using (var memoryStream = new MemoryStream())
using (var zip = new ZipFile())
{
    zip.AddEntry("Excel File 1.xlsx", excelFileStream1.ToArray());
    zip.AddEntry("Excel File 2.xlsx", excelFileStream2.ToArray());

    // Keep the file off of disk, and in memory.
    zip.Save(memoryStream);
}