How can I send the client multiple files to download

Question

I'm using a handler(.ashx) to serve some files. I have a folder where I store ebooks. I name them by the books PK, and each book may have a few different formats:

211.html
211.pdf
211.prc

The following test code successfully downloads one book.

context.Response.ContentType = "application/octet-stream";
context.Response.AppendHeader("Content-Disposition", "attachment;filename=myfile.pdf");
context.Response.TransmitFile(context.Server.MapPath("~/Media/eBooks/212.pdf"));

How can I serve the client the three different formats? (The clients existing organization isn't in a folder)

I was trying to do something like this:

DirectoryInfo bookDir  = new DirectoryInfo(context.Server.MapPath("~/Media/eBooks"));
FileInfo[] f  = bookDir.GetFiles();

foreach (var n in f)
{
    context.Response.AppendHeader("Content-Disposition", "attachment;filename=myfile.pdf");
    context.Response.TransmitFile(context.Server.MapPath("~/Media/eBooks/212.pdf"));
}

But it downloads one file with no file extension.

Answer 1

The only way you can send multiple files in one response is to put them inside an archive package, e.g. a .zip file. That is at least something that can be done with code, using various tools (IIRC there's a zip packager inside the main .NET framework now; otherwise, SharpZipLib will do the job nicely).