<Window x:Class="TestProject.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    Width="800"

    Height="600"

    Title="XpsDocument 클래스 : XPS 문서 이미지 저장하기"

    FontFamily="나눔고딕코딩"

    FontSize="16"

    Loaded="Window_Loaded">

    <Grid Margin="5">

        <Grid.Resources>

            <Style TargetType="TextBox">

                <Setter Property="Margin" Value="5" />

            </Style>

        </Grid.Resources>

        <Grid.RowDefinitions>

            <RowDefinition Height="Auto" />

            <RowDefinition Height="Auto" />

            <RowDefinition Height="Auto" />

            <RowDefinition/>

        </Grid.RowDefinitions>

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="Auto" />

            <ColumnDefinition/>

        </Grid.ColumnDefinitions>

        <Label Grid.Row="0" Grid.Column="0"

            Content="XPS 파일" />

        <TextBox Name="filePathTextBox" Grid.Row="0" Grid.Column="1"

            Text="Test.xps" />

        <Button Name="convertButton" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"

            Margin="5"

            Width="100"

            Height="30"

            IsDefault="True"

            Content="변환하기"

            Click="convertButton_Click" />

        <Label Grid.Row="2" Grid.Column="0"

            Content="스케일" />

        <ComboBox Name="cboScale" Grid.Row="2" Grid.Column="1"

            Width="60"

            Height="25"

            HorizontalAlignment="Left"

            SelectionChanged="scaleComboBox_SelectionChanged">

            <ComboBoxItem Content="25%" />

            <ComboBoxItem Content="50%" />

            <ComboBoxItem Content="75%" />

            <ComboBoxItem Content="100%" IsSelected="True" />

            <ComboBoxItem Content="150%" />

            <ComboBoxItem Content="200%" />

            <ComboBoxItem Content="300%" />

        </ComboBox>

        <TabControl Name="resultTabControl" Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="2"

             Margin="5"

             Visibility="Hidden" />

    </Grid>

</Window>

using System;

using System.IO;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Xps.Packaging;

namespace TestProject

{

    /// <summary>

    /// 메인 윈도우

    /// </summary>

    public partial class MainWindow : Window

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>

        /// 이미지 스케일

        /// </summary>

        private double imageScale = 1;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainWindow()

        /// <summary>

        /// 생성자

        /// </summary>

        public MainWindow()

        {

            InitializeComponent();

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        //////////////////////////////////////////////////////////////////////////////// Event

        #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e)

        /// <summary>

        /// 윈도우 로드시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void Window_Loaded(object sender, RoutedEventArgs e)

        {

            this.filePathTextBox.Text = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "test.xps");

        }

        #endregion

        #region 변환하기 버튼 클릭시 처리하기 - convertButton_Click(sender, e)

        /// <summary>

        /// 변환하기 버튼 클릭시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void convertButton_Click(object sender, RoutedEventArgs e)

        {

            Cursor = Cursors.Wait;

            this.resultTabControl.Visibility = Visibility.Hidden;

            int pageCount = SaveXPSImage(this.filePathTextBox.Text);

            ShowXPSImage(this.filePathTextBox.Text, pageCount);

            FitImageSize();

            this.resultTabControl.Visibility = Visibility.Visible;

            Cursor = null;

        }

        #endregion

        #region 스케일 콤보 박스 선택 변경시 처리하기 - scaleComboBox_SelectionChanged(sender, e)

        /// <summary>

        /// 스케일 콤보 박스 선택 변경시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void scaleComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

        {

            ComboBoxItem comboBoxItem = this.cboScale.SelectedItem as ComboBoxItem;

            string scaleString = comboBoxItem.Content.ToString();

            scaleString = scaleString.Replace("%", "");

            this.imageScale = double.Parse(scaleString) / 100.0;

            FitImageSize();

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region XPS 이미지 저장하기 - SaveXPSImage(xpsFilePath)

        /// <summary>

        /// XPS 이미지 저장하기

        /// </summary>

        /// <param name="xpsFilePath">XPS 파일 경로</param>

        /// <returns>페이지 카운트</returns>

        private int SaveXPSImage(string xpsFilePath)

        {

            if(!xpsFilePath.ToLower().EndsWith(".xps"))

            {

                throw new ArgumentException("파일 확장자가 .xps가 아닙니다.");

            }

            string fileName = xpsFilePath.Substring(0, xpsFilePath.Length - 4);

            XpsDocument xpsDocument = new XpsDocument(xpsFilePath, FileAccess.Read);

            IDocumentPaginatorSource documentPaginatorSource = xpsDocument.GetFixedDocumentSequence();

            DocumentPaginator documentPaginator = documentPaginatorSource.DocumentPaginator;

            int pageCount = documentPaginator.PageCount;

            for(int i = 0; i < pageCount; i++)

            {

                using(DocumentPage documentPage = documentPaginator.GetPage(i))

                {

                    int pageWidth  = (int)documentPage.Size.Width;

                    int pageHeight = (int)documentPage.Size.Height;

                    RenderTargetBitmap bitmap = new RenderTargetBitmap

                    (

                        pageWidth,

                        pageHeight,

                        96,

                        96,

                        PixelFormats.Default

                    );

                    bitmap.Render(documentPage.Visual);

                    PngBitmapEncoder encoder = new PngBitmapEncoder();

                    encoder.Frames.Add(BitmapFrame.Create(bitmap));

                    using(MemoryStream stream = new MemoryStream())

                    {

                        encoder.Save(stream);

                        using(FileStream fileStream = new FileStream(fileName + (i + 1).ToString() + ".png", FileMode.Create))

                        {

                            fileStream.Write(stream.GetBuffer(), 0, (int)stream.Length);

                            fileStream.Close();

                        }

                    }

                }

            }

            return pageCount;

        }

        #endregion

        #region XPS 이미지 표시하기 - ShowXPSImage(xpsFilePath, pageCount)

        /// <summary>

        /// XPS 이미지 표시하기

        /// </summary>

        /// <param name="xpsFilePath">XPS 파일 경로</param>

        /// <param name="pageCount">페이지 카운트</param>

        private void ShowXPSImage(string xpsFilePath, int pageCount)

        {

            string fileName = xpsFilePath.Substring(0, xpsFilePath.Length - 4);

            this.resultTabControl.Items.Clear();

            for(int i = 1; i <= pageCount; i++)

            {

                Image image = new Image();

                image.Source = new BitmapImage(new Uri(fileName + i.ToString() + ".png", UriKind.Absolute));

                ScrollViewer scrollViewer = new ScrollViewer();

                scrollViewer.Background                    = Brushes.Black;

                scrollViewer.Content                       = image;

                scrollViewer.VerticalScrollBarVisibility   = ScrollBarVisibility.Auto;

                scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;

                TabItem tabItem = new TabItem();

                this.resultTabControl.Items.Add(tabItem);

                tabItem.Header  = "페이지 " + i.ToString();

                tabItem.Content = scrollViewer;

            }

        }

        #endregion

        #region 이미지 크기 맞추기 - FitImageSize()

        /// <summary>

        /// 이미지 크기 맞추기

        /// </summary>

        private void FitImageSize()

        {

            if(this.resultTabControl == null)

            {

                return;

            }

            foreach(TabItem tabItem in this.resultTabControl.Items)

            {

                ScrollViewer scrollViewer = tabItem.Content as ScrollViewer;

                Image image = scrollViewer.Content as Image;

                image.Width  = image.Source.Width  * this.imageScale;

                image.Height = image.Source.Height * this.imageScale;

            }

        }

        #endregion

    }

}