Aspose.Slides for .NET 19.7 Release Notes

using (Presentation pres = new Presentation())
{
      IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.Pie, 50, 50, 400, 600, true);
      IChartData chartData = chart.ChartData;
      (chartData as ChartData).SetExternalWorkbook("http://path/doesnt/exists", false);
}

public void SetExternalWorkbookMethodNetwork()
{
   string externalWbPath = @"http://606178d2.ngrok.io/webgrind/styles/2.xlsx";
   LoadOptions opts = new LoadOptions();
   opts.ResourceLoadingCallback = new WorkbookLoadingHandler();
   using (Presentation pres = new Presentation(opts))
   {
      IChart chart = pres.Slides[0].Shapes.AddChart(ChartType.Pie, 50, 50, 400, 600, false);
      IChartData chartData = chart.ChartData;
      (chartData as ChartData).SetExternalWorkbook(externalWbPath);
   }
}

private class WorkbookLoadingHandler : IResourceLoadingCallback
{
   public ResourceLoadingAction ResourceLoading(IResourceLoadingArgs args)
   {
      string workbookPath = args.OriginalUri;
      if (workbookPath.IndexOf(':') > 1 && !workbookPath.StartsWith("file:///")) // schemed path
      {
         try
         {
            WebRequest request = WebRequest.Create(workbookPath);
            request.Credentials = new System.Net.NetworkCredential("testuser", "testuser");
            using (WebResponse response = request.GetResponse())
            using (Stream responseStream = response.GetResponseStream())
            {
                byte[] buffer = BlobDownloadManager.Download(responseStream);
                args.SetData(buffer);
                return ResourceLoadingAction.UserProvided;
            }
          }
          catch (Exception ex)
          {
             throw new InvalidOperationException(ex.ToString());
          }
      }
      else
      {
          return ResourceLoadingAction.Default;
      }
   }
} 

using (Presentation presentation = new Presentation(path + "input.pptx")
{
	// select paragraph to add effect
	IAutoShape autoShape = (IAutoShape)presentation.Slides[0].Shapes[0];
	IParagraph paragraph = autoShape.TextFrame.Paragraphs[0];
	
	// add Fly animation effect to selected paragraph
	IEffect effect = presentation.Slides[0].Timeline.MainSequence.AddEffect(paragraph, EffectType.Fly, EffectSubtype.Left, EffectTriggerType.OnClick);
}