Downloading of zip file through ASP.NET MVC using DotNetZip

Question

I have created a text file in a folder and zipped that folder and saved @same location for test purpose. I wanted to download that zip file directly on user machine after it

Answer 1

just a fix to Klaus solution: (as I can not add comment I have to add another answer!)

The solution is great but for me it gave corrupted zip file and I realized that it is because of return is before finalizing zip object so it did not close zip and result in a corrupted zip.

so to fix we need to just move return line after using zip block so it works. the final result is :

/// 

///     Zip a file stream
/// 
///  MemoryStream with original file 
///  Name of the file in the ZIP container 
///  Return byte array of zipped file 
private byte[] GetZippedFiles(MemoryStream originalFileStream, string fileName)
{
    using (MemoryStream zipStream = new MemoryStream())
    {
        using (ZipArchive zip = new ZipArchive(zipStream, ZipArchiveMode.Create, true))
        {
            var zipEntry = zip.CreateEntry(fileName);
            using (var writer = new StreamWriter(zipEntry.Open()))
            {
                originalFileStream.WriteTo(writer.BaseStream);
            }
        }
        return zipStream.ToArray();
    }
}

/// 

///     Download zipped file
/// 
[HttpGet]
public FileContentResult Download()
{
    var zippedFile = GetZippedFiles(/* your stream of original file */, "hello");
    return File(zippedFile, // We could use just Stream, but the compiler gets a warning: "ObjectDisposedException: Cannot access a closed Stream" then.
                "application/zip",
                "sample.zip");
}