Question

I have a folder on my web server that has hundreds of mp3 files in it. I would like to provide the option for a user to download a zipped archive of every mp3 in the directory from a web page.

I want to compress the files programmatically only when needed. Because the zip file will be quite large, I am thinking that I will need to send the zip file to the response stream as it is being zipped, for performance reasons.

Is this possible? How can I do it?

Answer 1

Here is code I use to do this with DotNetZip – works very well. Obviously you will need to provide the variables for outputFileName, folderName, and includeSubFolders.

response.ContentType = "application/zip";
response.AddHeader("content-disposition", "attachment; filename=" + outputFileName);
using (ZipFile zipfile = new ZipFile()) {
  zipfile.AddSelectedFiles("*.*", folderName, includeSubFolders);
  zipfile.Save(response.OutputStream);
}