/// <summary>
/// Load pdf page except pdf source.it only render the page bound.
/// </summary>
/// <param name="pdfDoc"></param>
void LoadPagesWithoutSource(PdfDocument pdfDoc)
{
double pageOffset = 0;
for (uint i = 0; i < pdfDoc.PageCount; i++)
{
using (var page = pdfDoc.GetPage(i))
{
var zoomRate = this.ActualWidth / page.Size.Width;
var pdfProvider = new PdfProvider
{
Bound = new Bound
{
Width = this.ActualWidth,
Height = page.Size.Height * zoomRate,
VerticalOffset = pageOffset
},
Index = (int)i
};
PdfPages.Add(pdfProvider);
pageOffset += pdfProvider.Bound.Height;
}
}
}
async void Load(PdfDocument pdfDoc)
{
try
{
PdfPages.Clear();
for (uint i = 0; i < pdfDoc.PageCount; i++)
{
BitmapImage image = new BitmapImage();
var page = pdfDoc.GetPage(i);
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await page.RenderToStreamAsync(stream);
await image.SetSourceAsync(stream);
}
PdfPages.Add(image);
}
pdfviewer.ItemsSource = PdfPages;
}
catch (Exception)
{
}
}
private async void Button_TappedAsync(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
{
if (PdfPages.Count == 0)
{
//load the pdf
StorageFile f = await
StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/PrivacyPolicy.pdf"));
PdfDocument doc = await PdfDocument.LoadFromFileAsync(f);
PdfPages.Clear();
for (uint i = 0; i < doc.PageCount; i++)
{
BitmapImage image = new BitmapImage();
var page = doc.GetPage(i);
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await page.RenderToStreamAsync(stream);
await image.SetSourceAsync(stream);
}
PdfPages.Add(image);
}
scroll.Height = Window.Current.Bounds.Height;
scroll.Width = Window.Current.Bounds.Width;
scroll.ChangeView(null, null, (float)((Window.Current.Bounds.Width) / PdfPages[0].PixelWidth));
pop.ItemsSource = PdfPages;
}
PopUp.IsOpen = true;
}
/// <summary>
/// Allows adding of BitmapImage objects to the control without a Pdf Document, so the
/// control can act as an image viewer as well as a Pdf Document viewer.
/// </summary>
/// <param name="img"></param>
public void AddPdfImage(BitmapImage img)
{
if (null != img)
{
PdfPages.Add(img);
_lastPdfImageLoaded++;
}
}
private async void CreatePages(PdfDocument imageDoc)
{
PdfPages.Clear();
for (int i = 0; i < imageDoc.PageCount; i++)
{
PdfPages.Add(new PdfViewerPage());
}
_pageCache = new PageCacheManager(PdfPages, imageDoc)
{
Prefetch = BufferPageCount
};
await _pageCache.LoadSelectedPage(Carousel.SelectedIndex);
}
//A method to Load in the Remote PDF file
async void Load(Windows.Data.Pdf.PdfDocument pdfDoc)
{
PdfPages.Clear();
//set up the pdf by saying i is less than total no. pages
for (uint i = 0; i < pdfDoc.PageCount; i++)
{
//Set up a new image to render the pdf to the app
BitmapImage image = new BitmapImage();
//get i-the pdf doc
var page = pdfDoc.GetPage(i);
//Ref:docs.Microsoft.com
//Provides random access of data in input and output streams
//that are stored in memory instead of on disk.
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await page.RenderToStreamAsync(stream);
await image.SetSourceAsync(stream);
}
PdfPages.Add(image);
}
}