Return file as stream

Question

I need when client send the id of user , i return file for it as stream. File may be image, PDF, video or sound.

I'm using this code:

[HttpGet]
public async Task<FileStreamResult> GetAvatar(int id)
{
    var result = await mediator.Send(new FindUserWithIdCommand { userId = id });
    if (result.Success)
    {
        return uploadService.GetFileStream(result.Result.AvatarName);
    }
    return null;
}

Upload service:

public FileStreamResult GetFileStream(string FileName)
{
    try
    {
        var stream = File.OpenRead(Path.Combine(finder.PathAvatarUserUploadFolder(), FileName));
        FileStreamResult file = new FileStreamResult(stream, "application/octet-stream");
        return file;
    }
    catch (Exception ex)
    {
        throw;
    }
}

but when i send a request for this action in postMan it show me this result:

The result in post man

Where's the problem and how can I solve it?

Could you explain what the problem is? You ask for a file and you get a file from what I see — Sami Kuhmonen, Jan 06 '20 at 07:50
And you get a file from what I see. So what exactly is not working here? — Sami Kuhmonen, Jan 06 '20 at 07:55
@SamiKuhmonen i need show file here and in browser but i download like a file and i need to go to the download folder and open it . — kianoush dortaj, Jan 06 '20 at 07:59
[What is the difference between inline and attachment?](https://stackoverflow.com/questions/1395151/content-dispositionwhat-are-the-differences-between-inline-and-attachment) — John Wu, Jan 06 '20 at 08:01
May be this can help: [ASP.Net Core Content-Disposition attachment/inline](https://stackoverflow.com/questions/38897764/asp-net-core-content-disposition-attachment-inline) — Suyash Gaur, Jan 06 '20 at 08:33

score 1 · Answer 1 · answered Jan 06 '20 at 13:56

1

Your code is doing exactly what it is supposed to. What you're seeing is byte-code, because Postman doesn't support native rendering of things like PDFs. It is the file; it's just being displayed "raw".

answered Jan 06 '20 at 13:56

Chris Pratt

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Return file as stream

1 Answers1