Question

I have some EML Files with attachments. I’ve parsed the EML files pulled out the attachments, and if I do this :

File.WriteAllBytes(attachment.Name, Convert.FromBase64String(attachment.Data))

I get the attachment dumped to a file. What I want to do is have a link so that when the user clicks on it, the attachment downloads.

Easy enough if its a file already on disk, but instead I have this base64encoded string that I can convert to a byte array. How can I take this base64encoded string (or the converted byte array) and generate a link directly to that?

Thanks

Answer 1

You would return back a FileResult class with the data from some other action method:

 public ActionResult DownloadData(string fileNameOrWhatever)
 {
      byte[] fileData = ...;

      return File(fileData, "someMimeType", "downloadNameToBeDisplayed");
 }

Your link would then point here:

<a href="/DownloadData/Something">Click me!</a>