How to download multiple files? Getting “Server cannot clear headers after HTTP headers have been sent.”

Question

I have an MVC application that shows a list of files for download. The user selects the files with a checkbox and these are generated as PDF\"s on the server side using the

Answer 1

You can zip all selected files and send it across. There is library available for same on codeplex called DotNetZip This is how you can zip it.

var outputStream = new MemoryStream();

using (var zip = new ZipFile())
{
    zip.AddFile("path to file one");
    zip.AddFile("path to file two");
    zip.AddFile("path to file three");
    zip.AddFile("path to file four");
    zip.Save(outputStream);
}

outputStream.Position = 0;
return File(outputStream, "application/zip","zip file name.zip");