dynamically displaying PDFs in C# MVC with iframe

Question

I have a File button to search for a File. I want to take the selected Path and display it in an iframe.

<div class="editor-field">
            @Html.TextBox("file", "", new { type = "file" })
</div>

My current iframe is:

@Html.AntiForgeryToken()
    <iframe src="@Url.Action("GetPDF")" ; height="1000" ; width="1000";%>'></iframe>

My current (static) GetPDF Method is the following:

public FileStreamResult GetPDF()
{

        FileStream fs = new FileStream("D:\\Temp.pdf", FileMode.Open, FileAccess.Read);
        return File(fs, "application/pdf");

}

So could you please help me and tell me how I can update my Iframe to the Pdf that i choose with my editor-field?

What is it you're trying to achieve? Where are the PDF's located, on the client machine or on the server? My assumption is you are trying to display a preview of the PDF from the client machine? If so your solution will not work, as the GetPDF action will be trying to load the PDF from server side. — Brent Mannering
– Brent Mannering, Commented May 30, 2016 at 1:03

Community · Accepted Answer · 2017-05-23 10:27:32Z

1

I believe there is already an answer to your question and it is as follows: Display PDF in iframe

EDIT 1:

    [HttpPost]
    public ActionResult GetPdf(HttpPostedFileBase uploadedPdf)
    {
        // user has selected a file
        if (uploadedPdf!= null && uploadedPdf.ContentLength > 0) 
        {
           //you have the file stream here *uploadedPdf*

            return File(fs, "application/pdf");
        }

        return null;      
    }

In order to achieve async file upload you can look into this or jQueryForm and attach an event on the file input.

EDIT 2: easy way to get from stream to byte array

using (MemoryStream ms = new MemoryStream()) {
    file.InputStream.CopyTo(ms);
    byte[] array = ms.GetBuffer();
}

edited May 23, 2017 at 10:27

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answered May 30, 2016 at 13:00

noobed

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1 Comment

Lukas Over a year ago

thx, but this doesnt help me much, because I am unable to get my path:<div class="editor-field"> @Html.TextBox("file", "", new { type = "file" }) </div>

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