How to load and display an image in PDF Viewer?

<div style="padding:10px">
                    <input type="file" id="fileUpload">
                    <button id="fileUploadButton">Choose file from disk</button>
                </div>

document.getElementById('fileUpload').addEventListener('change', readFile, false);
        function readFile(evt) {
            var upoadedFiles = evt.target.files;
            var uploadedFile = upoadedFiles[0];
            var reader = new FileReader();
            reader.readAsDataURL(uploadedFile);
            reader.onload = function () {
                //Gets the uploaded image data as base64 string
                var uploadedFileUrl = this.result;        
                var fileUrl = uploadedFileUrl.split("base64,")[1];           
                var jsonResult = {};
                jsonResult["uploadedFile"] = JSON.stringify(fileUrl);
                $.ajax({
                        url: "../api/PdfViewer/LoadImage",
                        type: 'POST',
                        contentType: 'application/json; charset=utf-8',
                        data: JSON.stringify(jsonResult),
                        dataType: 'json',                       
                        crossDomain: true,
                        traditional: true,
                        success: function (data) {
                         var pdfviewer = $("#container").data("ejPdfViewer");
                         //Loads the base64 string in PDF viewer
                        pdfviewer.load(data);                          
                        }
                    });                   
            }
        }        

  public object LoadImage(Dictionary<string, string> jsonResult) {
            var fileurl = jsonResult["uploadedFile"];
 
            var data = JsonConvert.DeserializeObject(fileurl);
 
            //Converts the base64 string to byte array
 
            byte[] byteArray = Convert.FromBase64String((string)data);
 
            MemoryStream stream = new MemoryStream(byteArray);
 
            //Converts memory stream to image
 
            Image img = Image.FromStream(stream);
 
            //Create a new PDF document
 
            PdfDocument doc = new PdfDocument();
 
            //Add a page to the document
 
            PdfPage page = doc.Pages.Add();
 
            //Create PDF graphics for the page
 
            PdfGraphics graphics = page.Graphics;
 
            //Converts the memory stream into PdfBitmap
 
            PdfBitmap image = new PdfBitmap(stream);
 
            //Draw the image
 
            graphics.DrawImage(image, 0, 0);
 
            MemoryStream docStream = new MemoryStream();
 
            doc.Save(docStream);
 
            string output = "data:application/pdf;base64," + Convert.ToBase64String(docStream.ToArray());            
 
            return output;
        }