WPF DocumentViewer Find-function and FixedPage documents - wpf

Question

.Net contains a nice control called DocumentViewer. it also offers a subcontrol for finding text in the loaded document (that's at least what it is supposed to do).
When inserting FixedPage's objects as document source for the DocumentViewer, the find-functionality just does not find anything. Not even single letters. I haven't tried FlowDocument's yet,
as the documentation for DocumentViewer is not that useful and the resources on the net are not actually existing, I now want to ask the stackoverflow community:
What does it need to get the Find-Function of the WPF DocumentViewer working with FixedPage documents?
[btw, I don't use custom ControlTemplates for DocumentViewer]

Answer 1

I had this same problem with FixedDocuments. If you convert your FixedDocument to an XPS document then it works fine.
Example of creating an XPS Document in memory from a FixedDocument then displaying in a DocumentViewer.
// Add to xaml: <DocumentViewer x:Name="documentViewer" />
// Add project references to "ReachFramework" and "System.Printing"
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.IO;
using System.IO.Packaging;
using System.Windows.Xps.Packaging;
namespace WpfApplication1
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
// Set up demo FixedDocument containing text to be searched
var fixedDocument = new FixedDocument();
var pageContent = new PageContent();
var fixedPage = new FixedPage();
fixedPage.Children.Add(new TextBlock() { Text = "Demo document text." });
pageContent.Child = fixedPage;
fixedDocument.Pages.Add(pageContent);
// Set up fresh XpsDocument
var stream = new MemoryStream();
var uri = new Uri("pack://document.xps");
var package = Package.Open(stream, FileMode.Create, FileAccess.ReadWrite);
PackageStore.AddPackage(uri, package);
var xpsDoc = new XpsDocument(package, CompressionOption.NotCompressed, uri.AbsoluteUri);
// Write FixedDocument to the XpsDocument
var docWriter = XpsDocument.CreateXpsDocumentWriter(xpsDoc);
docWriter.Write(fixedDocument);
// Display XpsDocument in DocumentViewer
documentViewer.Document = xpsDoc.GetFixedDocumentSequence();
}
}
}

Answer 2

I had trouble with searching text in richtextbox, it was too slow. What I did was crunch the xaml every time I wanted to search. I improved several orders of magnitude.
It's a big workaround based in a part of the Chris Anderson's book.
Cheers