Simple partial view Image Viewer in MVC 5 with leadtools 19. - example of html5 partial view image viewer

public async Task<HttpResponseMessage> Load(int pageNumber = 1, int resolution = 0, string mimeType = null, int bitsPerPixel = 0, int qualityFactor = 0, int imageWidth = 0, int imageHeight = 0)
      {

         if (!this.Request.Content.IsMimeMultipartContent())
            throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotAcceptable, "Request is not properly formatted"));

         var provider = await this.Request.Content.ReadAsMultipartAsync<MultipartMemoryStreamProvider>(new MultipartMemoryStreamProvider());

         HttpContent content = (provider.Contents.Count > 0) ? content = provider.Contents[0] : null;
         if (content == null) throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotAcceptable, "Request has no content"));

         var stream = content.ReadAsStreamAsync().Result;

         if (pageNumber < 0)
            throw new ArgumentOutOfRangeException("pageNumber", "must be a value greater than or equal to 0");

         var page = pageNumber;
         // Default is page 1
         if (page == 0)
            page = 1;

         if (resolution < 0)
            throw new ArgumentOutOfRangeException("resolution", "must be a value greater than or equals to 0");

         // Sanity check on other parameters
         if (qualityFactor < 0 || qualityFactor > 100)
            throw new ArgumentOutOfRangeException("qualityFactor", "must be a value between 0 and 100");

         if (imageWidth < 0)
            throw new ArgumentOutOfRangeException("width", "must be a value greater than or equal to 0");
         if (imageHeight < 0)
            throw new ArgumentOutOfRangeException("height", "must be a value greater than or equal to 0");

         // Get the image format
         SaveImageFormat saveFormat = SaveImageFormat.GetFromMimeType(mimeType);

         // Use a temp file, much faster than calling Load/Info from a URI directly
         // In a production service, you might want to create a caching mechanism

         try
         {
            using (RasterCodecs codecs = new RasterCodecs())
            {
               ServiceHelper.InitCodecs(codecs, resolution);

               // Load the page
               using (RasterImage image = codecs.Load(stream, 0, CodecsLoadByteOrder.BgrOrGray, pageNumber, pageNumber))
               {
                  // Resize it (will only resize if both width and height are not 0), will also take care of FAX images (with different resolution)
                  ImageResizer.ResizeImage(image, imageWidth, imageHeight);

                  // We need to find out the format, bits/pixel and quality factor
                  // If the user gave as a format, use it
                  if (saveFormat == null)
                  {
                     // If the user did not give us a format, use PNG
                     saveFormat = new PngImageFormat();
                     mimeType = "image/png";
                  }

                  saveFormat.PrepareToSave(codecs, image, bitsPerPixel, qualityFactor);

                  // Save it to a memory stream
                  MemoryStream ms = null;
                  HttpResponseMessage response = null;
                  try
                  {
                     ms = new MemoryStream();
                     codecs.Save(image, ms, saveFormat.ImageFormat, saveFormat.BitsPerPixel);
                     ms.Position = 0;

                     // Set the MIME type and Content-Type if there is a valid web context
                     HttpContext currentContext = HttpContext.Current;
                     if (currentContext != null)
                     {
                        currentContext.Response.ContentType = mimeType;
                        currentContext.Response.Headers.Add("ContentLength", ms.Length.ToString());
                     }

                     // If we just return the stream, Web Api will try to serialize it.
                     // If the return type is "HttpResponseMessage" it will not serialize
                     // and you can set the content as you wish.
                     response = new HttpResponseMessage();
                     response.Content = new StreamContent(ms);
                     return response;
                  }
                  catch
                  {
                     if (ms != null)
                        ms.Dispose();
                     if (response != null)
                        response.Dispose();
                     throw;
                  }
               }
            }
         }
         catch (Exception ex)
         {
            Log(string.Format("Load - Error:{1}{0}TempFile:{2}{0}Uri:{3}, PageNumber:{4}", Environment.NewLine, ex.Message, tempFile, uri, pageNumber));
            throw;
         }
      }