What return if FileContentResult is null

Question

I have method, that return FileContentResult:

    public FileContentResult fileStream(string EAN)
    {
        //Finding byte[] of PDF
        byte[] pdf = findPDF(EAN);

        return new FileContentResult(pdf, "application/pdf");
    }

And I use it in iframe:

<iframe src="@Url.Action("fileStream", "Approve", new { EAN = Model.ID_EAN })" frameborder="0"></iframe>

What should I return if pdf is null (FileContentResult is null). Now it shows Error page with controller name and controller action.

I want to return something like message "This PDF not found" — Michal Fiala, Nov 16 '17 at 10:17
Please add you solution as an answer, not as an edit to your question, to learn more how SO works see [tour] — Petter Friberg, Nov 16 '17 at 10:39

score 6 · Accepted Answer · answered Nov 16 '17 at 10:40

I've changed return value of my method to ActionResult and returned new HttpNotFoundResult();

    public ActionResult fileStream(string EAN)
    {
        //Hledani byte[] pdf
        byte[] pdf = findPDF(EAN);

        if (pdf == null)
            return new HttpNotFoundResult();

        return new FileContentResult(pdf, "application/pdf");
    }

What return if FileContentResult is null

1 Answers1