how to show word document in viewer using wpf application?

Hi friends here i will show you complete code with example to show you word document in viewer in wpf application. Let's start to learn document viewer,

Main window

<Window x:Class="DocumentShow.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="70"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <Label Name="lable1" Margin="3,6,0,0" Content="Show Word File:" VerticalAlignment="Top" HorizontalAlignment="Left" />
        <TextBox  Name="txt_filename" VerticalAlignment="Top"  HorizontalAlignment="Stretch" Margin="110,10,300,0" HorizontalContentAlignment="Left" />
        <Button HorizontalAlignment="Right" VerticalAlignment="Top" Width="150" Content="Select File(word)" Name="wordbutton" Margin="0,10,130,0" Click="wordbutton_Click"  />
        <Button HorizontalAlignment="Left" Margin="407,10,0,0" VerticalAlignment="Top" Content="View Word File" Width="100" Name="viewdoc" Click="viewdoc_Click" />
        <DocumentViewer Name="dc" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="0,37,0,0" Grid.RowSpan="2"/>
    </Grid>
</Window>

MainWindow.cs

using System;
using System.IO;
using System.Windows;
using System.Windows.Xps.Packaging;
using Microsoft.Office.Interop.Word;
using Microsoft.Win32;
using Word = Microsoft.Office.Interop.Word;
namespace DocumentShow
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : System.Windows.Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void wordbutton_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            // Set filter and RestoreDirectory
            openFileDialog.RestoreDirectory = true;
            openFileDialog.Filter = "Word documents(*.doc;*.docx)|*.doc;*.docx";
            bool? result = openFileDialog.ShowDialog();
            if (result == true)
            {
                if (openFileDialog.FileName.Length > 0)
                {
                    txt_filename.Text = openFileDialog.FileName;
                }
            }
        }
        private XpsDocument ConvertWordToXps(string wordFilename, string xpsFilename)
        {
            // Create a WordApplication and host word document
            Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();
            try
            {
                wordApp.Documents.Open(wordFilename);
                // To Invisible the word document
                wordApp.Application.Visible = false;
                // Minimize the opened word document
                wordApp.WindowState = WdWindowState.wdWindowStateMinimize;
                Document doc = wordApp.ActiveDocument;
                doc.SaveAs(xpsFilename, WdSaveFormat.wdFormatXPS);
                XpsDocument xpsDocument = new XpsDocument(xpsFilename, FileAccess.Read);
                return xpsDocument;
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error occurs, The error message is  " + ex.ToString());
                return null;
            }
            finally
            {
                wordApp.Documents.Close();
                ((_Application)wordApp).Quit(WdSaveOptions.wdDoNotSaveChanges);
            }
        }
        private void viewdoc_Click(object sender, RoutedEventArgs e)
        {
            string wordDocument = txt_filename.Text;
            if (string.IsNullOrEmpty(wordDocument) || !File.Exists(wordDocument))
            {
                MessageBox.Show("The file is invalid. Please select an existing file again.");
            }
            else
            {
                string convertedXpsDoc = string.Concat(System.IO.Path.GetTempPath(), "\\", Guid.NewGuid().ToString(), ".xps");
                XpsDocument xpsDocument = ConvertWordToXps(wordDocument, convertedXpsDoc);
                if (xpsDocument == null)
                {
                    return;
                }
                dc.Document = xpsDocument.GetFixedDocumentSequence();
            }
        }
    }
}

Let's see the output snap of it,

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