How to convert XAML to PDF in UWP?

Syncfusion Essential PDF is the UWP PDF library used to create, read, and edit PDF documents. Using this library, you can convert XAML to PDF in UWP platform.

Steps to convert XAML to PDF programmatically:

1. Create a new UWP application project.
2. Install the Syncfusion.Pdf.UWP NuGet package as reference to your UWP application from NuGet.org
3. Include the following namespaces in the MainPage.xaml.cs file.

C#

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;

4. Include the following code snippet in the click event of the button in MainPage.xaml.cs to convert XAML to PDF and save it in a stream.

C#

//Create a new PDF document
PdfDocument document = new PdfDocument();
//Add a new page
PdfPage page = document.Pages.Add();
//Initialize render to bitmap
var logicalDpi = DisplayInformation.GetForCurrentView().LogicalDpi;
var renderTargetBitmap = new RenderTargetBitmap();
//Create a Bitmap from XAML page
await renderTargetBitmap.RenderAsync(SyncfusionForm);
var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();
//Save the XAML in bitmap image
 using (var stream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
        var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
       encoder.SetPixelData(
       BitmapPixelFormat.Bgra8,
       BitmapAlphaMode.Ignore,
       (uint)renderTargetBitmap.PixelWidth,
       (uint)renderTargetBitmap.PixelHeight,
       logicalDpi,
       logicalDpi,
       pixelBuffer.ToArray());
      await encoder.FlushAsync();
      //Load and draw the bitmap image in PDF
      PdfImage img = PdfImage.FromStream(stream.AsStream());
      document.PageSettings.Margins.All = 0;
      if (img.Width > img.Height)                
           document.PageSettings.Orientation = PdfPageOrientation. Landscape;                
      else                
           document.PageSettings.Orientation = PdfPageOrientation. Portrait;                
      document.PageSettings.Size = new SizeF(img.Width, img.Height);                             
      PdfPage page = document.Pages.Add();
      page.Graphics.DrawImage(img, new RectangleF(0, 0, img.Width, img.Height));
}
//Save the document
MemoryStream docStream = new MemoryStream();
document.Save(docStream);
//Close the document 
document.Close(true);
Save(docStream, "Sample.pdf");

5. Use the following helper method to save the stream as a physical file and open the file for viewing.

   #region Helper Methods
   public async void Save(Stream stream, string filename)
           {
               stream.Position = 0;
               StorageFile stFile;
               if (!(Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons")))
               {
                   FileSavePicker savePicker = new FileSavePicker();
                   savePicker.DefaultFileExtension = ".pdf";
                   savePicker.SuggestedFileName = "Output";
                   savePicker.FileTypeChoices.Add("Adobe PDF Document", new List<string>() { ".pdf" });
                   stFile = await savePicker.PickSaveFileAsync();
               }
               else
               {
                   StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder;
                   stFile = await local.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
               }
               if (stFile != null)
               {
                   Windows.Storage.Streams.IRandomAccessStream fileStream = await stFile.OpenAsync(FileAccessMode.ReadWrite);
                   Stream st = fileStream.AsStreamForWrite();
                   st.Write((stream as MemoryStream).ToArray(), 0, (int)stream.Length);
                   st.Flush();
                   st.Dispose();
                   fileStream.Dispose();
                   MessageDialog msgDialog = new MessageDialog("Do you want to view the Document?", "File created.");
                   UICommand yesCmd = new UICommand("Yes");
                   msgDialog.Commands.Add(yesCmd);
                   UICommand noCmd = new UICommand("No");
                   msgDialog.Commands.Add(noCmd);
                   IUICommand cmd = await msgDialog.ShowAsync();
                   if (cmd == yesCmd)
                   {
                       // Launch the retrieved file
                       bool success = await Windows.System.Launcher.LaunchFileAsync(stFile);
                   }
               }
           }
   #endregion
   

By executing the program, you will get the PDF document as follows.

A complete working sample can be downloaded from XAMLtoPDF_Sample.zip

Take a moment to peruse the documentation, where you will find other options like converting TIFF to PDF, RTF to PDF, and XPS to PDF document.

Refer here to explore the rich set of Syncfusion Essential PDF features.