Hi Niels,

There are a few bits an pieces to consider, but basically you need to return the File, however there are a couple of different ways of doing this.

You can return a FilePathResult, as demonstrated here: https://www.c-sharpcorner.com/UploadFile/db2972/file-result-in-controller-sample-in-mvc-day-15/

You can also return a FileStreamResult discussed in the question here: https://stackoverflow.com/questions/5826649/returning-a-file-to-view-download-in-asp-net-mvc

Or you can roll your own HttpResponseMessage as demonstrated here: https://stackoverflow.com/questions/9541351/returning-binary-file-from-controller-in-asp-net-web-api

There is also a FileContentResult which I couldn't find an example of quickly (sorry)

Each approach has different benefits and I think in the past I've generally used a FileContentResult to return files from controllers.

Cheers

Nik

Thanx for your input, Nik!

I ended up using a FileContentResult like this;

return (ActionResult)this.File(this.GetFile(this.Server.MapPath("/zip/" + (object)productPageID + "datasheets.zip")), "application/octet-stream", "datasheets.zip");

the GetFile method returns a byte-array like this;

private byte[] GetFile(string s)
    {
        FileStream fileStream = System.IO.File.OpenRead(s);
        byte[] buffer = new byte[fileStream.Length];
        if ((long)fileStream.Read(buffer, 0, buffer.Length) != fileStream.Length)
            throw new IOException(s);
        return buffer;
    }

This works like a charm :)

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