/// <summary>
/// The methods provided in this section are simply used to allow
/// NavigationHelper to respond to the page's navigation methods.
/// <para>
/// Page specific logic should be placed in event handlers for the
/// <see cref="NavigationHelper.LoadState"/>
/// and <see cref="NavigationHelper.SaveState"/>.
/// The navigation parameter is available in the LoadState method
/// in addition to page state preserved during an earlier session.
/// </para>
/// </summary>
/// <param name="e">Provides data for navigation methods and event
/// handlers that cannot cancel the navigation request.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
this.navigationHelper.OnNavigatedTo(e);
int pageNumber = (int)e.Parameter;
PdfFixedDocument document = (Application.Current as App).Document;
var t = Task <PdfBgraByteRenderingSurface> .Factory.StartNew(() =>
{
PdfPageRenderer renderer = new PdfPageRenderer(document.Pages[pageNumber]);
PdfBgraByteRenderingSurface rs = renderer.CreateRenderingSurface <PdfBgraByteRenderingSurface>(96, 96);
PdfRendererSettings settings = new PdfRendererSettings(96, 96, rs);
renderer.ConvertPageToImage(settings);
return(rs);
})
.ContinueWith(value =>
{
PdfBgraByteRenderingSurface rs = value.Result;
WriteableBitmap pageBitmap = new WriteableBitmap(rs.Width, rs.Height);
Stream imageStream = pageBitmap.PixelBuffer.AsStream();
imageStream.Write(rs.Bitmap, 0, rs.Bitmap.Length);
pageImage.Width = pageBitmap.PixelWidth;
pageImage.Height = pageBitmap.PixelHeight;
pageImage.Source = pageBitmap;
}, TaskScheduler.FromCurrentSynchronizationContext());
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.
/// This parameter is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
Assembly assembly = typeof(MainPage).GetTypeInfo().Assembly;
Stream pdfStream =
assembly.GetManifestResourceStream("Xfinium.Pdf.Samples.Pro.WP81.PageThumbnails.xfinium.pdf");
PdfFixedDocument document = new PdfFixedDocument(pdfStream);
pdfStream.Dispose();
int i = 0;
pageThumbnailImages = new Image[document.Pages.Count];
for (i = 0; i < document.Pages.Count; i++)
{
Border border = new Border();
border.BorderThickness = new Thickness(1);
border.BorderBrush = new SolidColorBrush(Colors.Black);
border.Margin = new Thickness(10, 10, 0, 0);
Image pageImage = new Image();
border.Child = pageImage;
pageThumbnailImages[i] = pageImage;
pageThumbnails.Children.Add(border);
}
for (i = 0; i < document.Pages.Count; i++)
{
int index = i;
var t = Task <PdfBgraByteRenderingSurface> .Factory.StartNew(() =>
{
PdfPageRenderer renderer = new PdfPageRenderer(document.Pages[index]);
PdfBgraByteRenderingSurface rs = renderer.CreateRenderingSurface <PdfBgraByteRenderingSurface>(thumbnailDpi, thumbnailDpi);
PdfRendererSettings settings = new PdfRendererSettings(thumbnailDpi, thumbnailDpi, rs);
renderer.ConvertPageToImage(settings);
return(rs);
})
.ContinueWith(value =>
{
PdfBgraByteRenderingSurface rs = value.Result;
WriteableBitmap pageBitmap = new WriteableBitmap(rs.Width, rs.Height);
Stream imageStream = pageBitmap.PixelBuffer.AsStream();
imageStream.Write(rs.Bitmap, 0, rs.Bitmap.Length);
pageThumbnailImages[index].Width = pageBitmap.PixelWidth;
pageThumbnailImages[index].Height = pageBitmap.PixelHeight;
pageThumbnailImages[index].Source = pageBitmap;
}, TaskScheduler.FromCurrentSynchronizationContext());
}
}
private void btnConvert_Click(object sender, RoutedEventArgs e)
{
if (cbxPageNumber.SelectedIndex != -1)
{
PdfPageRenderer renderer = new PdfPageRenderer(document.Pages[cbxPageNumber.SelectedIndex]);
PdfBgraByteRenderingSurface rs = renderer.CreateRenderingSurface <PdfBgraByteRenderingSurface>(96, 96);
PdfRendererSettings settings = new PdfRendererSettings(96, 96, rs);
renderer.ConvertPageToImage(settings);
WriteableBitmap pageBitmap = new WriteableBitmap(rs.Width, rs.Height);
Stream imageStream = pageBitmap.PixelBuffer.AsStream();
imageStream.Write(rs.Bitmap, 0, rs.Bitmap.Length);
//pageImage.Width = pageBitmap.PixelWidth;
//pageImage.Height = pageBitmap.PixelHeight;
pageImage.Source = pageBitmap;
}
}
