MVC3 Valums Ajax File Upload

I figured it out. this works in IE and Mozilla.

    [HttpPost]
    public ActionResult FileUpload(string qqfile)
    {
        var path = @"C:\\Temp\\100\\";
        var file = string.Empty;

        try
        {
            var stream = Request.InputStream;
            if (String.IsNullOrEmpty(Request["qqfile"]))
            {
                // IE
                HttpPostedFileBase postedFile = Request.Files[0];
                stream = postedFile.InputStream;
                file = Path.Combine(path, System.IO.Path.GetFileName(Request.Files[0].FileName));
            }
            else
            {
                //Webkit, Mozilla
                file = Path.Combine(path, qqfile);
            }

            var buffer = new byte[stream.Length];
            stream.Read(buffer, 0, buffer.Length);
            System.IO.File.WriteAllBytes(file, buffer);
        }
        catch (Exception ex)
        {
            return Json(new { success = false, message = ex.Message }, "application/json");
        }

       return Json(new { success = true }, "text/html");
    }