Valums file-uploader doesn't work under Internet Explorer 9

Question

Valums file-uploader (now called Fine Uploader) doesn't work under Internet Explorer 9 but wors fine under Chrome.

So under IE it shows the name of the file and button CANCEL and no % of uploading.

Any clue?

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UPDATES:

Solution is here as well MVC Valums Ajax Uploader - IE doesn't send the stream in request.InputStream

Answer 1

I know this question was filed under asp.net specifically, but it came up when I searched for "valums ajax upload IE9", so I'll post my fix here in case it helps anyone like myself regardless of language:

I was returning a JSON response from the AJAX upload request with a "application/json" content header. IE9 does not know what to do with "application/json" content (but Chrome/FF/etc do).

I fixed this by making sure to return a "text/html" MIME type http header on my json response from the server.

Now IE is no longer trying to download the response! Cheers

Answer 2

I am unable to reproduce the issue. Here's a full working example.

Controller:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public ActionResult Upload(HttpPostedFileBase qqfile)
    {
        var uploadPath = Server.MapPath("~/app_data");
        if (qqfile != null)
        {
            var filename = Path.Combine(uploadPath, Path.GetFileName(qqfile.FileName));
            qqfile.SaveAs(filename);
            return Json(new { success = true }, "text/html");
        }
        else 
        {
            var filename = Request["qqfile"];
            if (!string.IsNullOrEmpty(filename))
            {
                filename = Path.Combine(uploadPath, Path.GetFileName(filename));
                using (var output = System.IO.File.Create(filename))
                {
                    Request.InputStream.CopyTo(output);
                }
                return Json(new { success = true });
            }
        }
        return Json(new { success = false });
    }
}

Index.cshtml view:

<script src="@Url.Content("~/Scripts/valums/fileuploader.js")" type="text/javascript"></script>

<div id="file-uploader">       
    <noscript>          
        <p>Please enable JavaScript to use file uploader.</p>
    </noscript>         
</div>

<script type="text/javascript">
    var uploader = new qq.FileUploader({
        element: document.getElementById('file-uploader'),
        action: '@Url.Action("upload")'
    });
</script>

You could also include the CSS in your Layout:

<link href="@Url.Content("~/Scripts/valums/fileuploader.css")" rel="stylesheet" type="text/css" />