Convert Wpf form to Pdf report

Question

Dear Sirs:

We have a WPF application which display a complex form for a medical data record. User can also click a button to convert the form into the Pdf format for further reading. The current implementation is a two steps conversion which is to to convert it to .XPS first and then convert from Xps to .Pdf.

Unfortunately converting from Wpf form to Xps is a lengthy procedure. Which always takes more than 30 seconds to complete. is there any more efficient way for this conversion? We are using the very formal code as below.

        using (var mem = new MemoryStream())
        using (var pkg = Package.Open(mem, FileMode.Create, FileAccess.ReadWrite))
        using (XpsDocument xpsDoc = new XpsDocument(pkg))
        {
            XpsDocumentWriter xpsWriter = XpsDocument.CreateXpsDocumentWriter(xpsDoc);
            MyDocumentPaginator paginator = new MyDocumentPaginator(listVisual, pageSize, false);
            paginator.ComputePageCount();
            for (int i = 0; i < paginator.PageCount; i++)
            {
                var p = paginator.GetPage(i);
                if (p == null)
                    continue;
                var x = p.Visual;
                if (x is Canvas)
                {
                    var canvas = x as Canvas;
                    canvas.Width = pageSize.Width;
                    canvas.Height = pageSize.Height;
                    canvas.UpdateLayout();
                }
            }
            xpsWriter.Write(paginator);
            xpsDoc.Close();
            pkg.Close();
            mem.Seek(0, SeekOrigin.Begin);
            return mem.ToArray();
        }

Best Regards
Jeff Wei

Answer 1

Dear Sirs

The converted Pdf file is generally small. Ranged from 2M to 10M normally. The conversion from Wpf to .Xps is lengthy, while it is quicker to convert the .Xps to .Pdf.

Best Regards
Jeff WEI