Code

class DiagramEx : Diagram
{
	Diagram diagram;
	public DiagramEx(Diagram diagram)
	{
		this.diagram = diagram;
	}
	public override void Draw(IGraphics graphics,
		RenderOptions options, RectangleF clipRect, bool noModifiedItems)
	{
		options.PaintControls = true;
		diagram.Draw(graphics, options, clipRect, noModifiedItems);
	}
}

wmfExporter.Export(new DiagramEx(diagram), path); 

Code

System.Runtime.InteropServices.ExternalException occurred
  HResult=-2147467259
  Message=A generic error occurred in GDI+.
  Source=System.Drawing
  ErrorCode=-2147467259
  StackTrace:
       at System.Drawing.Bitmap.LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format, BitmapData bitmapData)
       at System.Drawing.Bitmap.LockBits(Rectangle rect, ImageLockMode flags, PixelFormat format)
       at MindFusion.Pdf.Tools.x3e30ee412360b69f(Bitmap xe058541ca798c059, Boolean x5ffbb4b34fae8a48)
       at MindFusion.Pdf.Tools.GetImageContentEx(Image imagesrc, Boolean IsGrayscale)
       at MindFusion.Pdf.PdfImage.GetContent()
       at MindFusion.Pdf.PdfObject.Save(PDFWriter writer)
       at MindFusion.Pdf.PdfPage.Save(PDFWriter writer)
       at MindFusion.Pdf.PdfDocument.Save(String fileName)
       at MindFusion.Pdf.PdfGraphics.SaveContent()
       at MindFusion.Pdf.PdfGraphics.Dispose()
       at MindFusion.Diagramming.Export.PdfExporter.Export(Diagram diagram, String filePath)
       at NATO.EB.Client.Views.Sketchpad2.SketchpadDiagram2.Export2PDF()
  InnerException:

 

Code (C++)

        private void flowChart_PaintControlHost(object sender, PaintControlEventArgs e)
        {
            e.Handled = false;
            var graphControl = e.Node.Control as MsChartBaseControl;
            if (graphControl != null)
            {
                var paintRect = diagramView.DocToClient(e.PaintRect);
                var bmp = graphControl.GetBitmap(paintRect.Size.Width, paintRect.Size.Height);
                e.Graphics.DrawImage(bmp, e.PaintRect);
                bmp.Dispose();
                e.Handled = true;
            }
        }
 

Code (C++)

        private void flowChart_PaintControlHost(object sender, PaintControlEventArgs e)
        {
            e.Handled = false;
            var graphControl = e.Node.Control as MsChartBaseControl;
            if (graphControl != null)
            {
                var paintRect = diagramView.DocToClient(e.PaintRect);
                var bmp = graphControl.GetBitmap(paintRect.Size.Width, paintRect.Size.Height);
                var bmpNew = new Bitmap(bmp);
                var g = Graphics.FromImage(bmpNew);
                g.DrawImage(bmp, new Point(0, 0));
                g.Dispose();
                bmp.Dispose();
                e.Graphics.DrawImage(bmpNew, e.PaintRect);
                bmpNew.Dispose();
                e.Handled = true;
            }
        }