<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="600" Width="800"> <TabControl> <TabItem Header="Fixed Document"> <DockPanel> <Button DockPanel.Dock="Bottom" Content="Open..." Click="btnOpenFlowDoc_Click"/> <DocumentViewer x:Name="dvDocumentViewer" /> </DockPanel> </TabItem> </TabControl> </Window> //File:Window.xaml.cs using System; using System.IO; using System.Windows; using System.Windows.Documents; using System.Windows.Markup; using System.Windows.Xps.Packaging; using System.Xml; using Microsoft.Win32; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void btnOpenFlowDoc_Click(object sender, RoutedEventArgs e) { Stream file = file = File.OpenRead("c:\\b.xps"); TextReader reader = new StreamReader(file); XmlTextReader xmlReader = new XmlTextReader(reader); FlowDocument flowDocument = XamlReader.Load(xmlReader) as FlowDocument; dvDocumentViewer.Document = flowDocument; } } }