转载

WPF中查看PDF文件

需要打开PDF文件时，我们第一印象就是使用Adobe Reader。在开发中，经常会遇到需要展示PDF文件的需求。我们会借助于Adobe Reader的Active控件来实现。不过这需要客户的机器上安装有Adobe Reader，并且使用Adobe Reader的Active控件会在顶部有一个隐藏不了的工具栏。这样显然不合理。

在Github上看到一个非常好的WPF中承载PDF文件的类库。

https://github.com/reliak/moonpdf

使用非常简单，本篇博客将介绍使用MoonPdf类库来展示PDF文件。在 Sourceforge 上下载到MoonPdf编译好的Dll。下面通过一个WPF程序来演示，

1. 工程中添加对MoonPdfLib.dll的引用，另外记得将libmupdf.dll放置于WPF工程Bin文件下。

2. 代码：

XAML:

<Window x:Class="WPFPdfViewer.MainWindow"  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  xmlns:mpp="clr-namespace:MoonPdfLib;assembly=MoonPdfLib"  xmlns:local="clr-namespace:WPFPdfViewer"  mc:Ignorable="d"  Title="WPF Pdf Viewer" Height="350" Width="525">     <Grid>  <Grid.RowDefinitions>      <RowDefinition Height="Auto"/>      <RowDefinition Height="*"/>  </Grid.RowDefinitions>  <Border Background="#f0f0f0">      <StackPanel HorizontalAlignment="Left" Orientation="Horizontal">   <Button Content="文件" Width="50" Click="FileButton_Click" Margin="5,5"/>   <Button Content="放大" Width="50" Click="ZoomInButton_Click" Margin="0,5"/>   <Button Content="缩小" Width="50" Click="ZoomOutButton_Click" Margin="5,5"/>   <Button Content="100%" Width="50" Click="NormalButton_Click" Margin="0,5"/>   <Button Content="整页" Width="50" Click="FitToHeightButton_Click" Margin="5,5"/>   <Button Content="单页" Width="50" Click="SinglePageButton_Click" Margin="0,5"/>   <Button Content="双页" Width="50" Click="FacingButton_Click" Margin="5,5"/>      </StackPanel>  </Border>  <Border Background="#d3d3d3" Grid.Row="1">      <mpp:MoonPdfPanel x:Name="moonPdfPanel" Background="LightGray" ViewType="SinglePage" PageRowDisplay="ContinuousPageRows" PageMargin="0,2,4,2" AllowDrop="True"/>  </Border>     </Grid> </Window>

C#:

 public partial class MainWindow : Window {  private bool _isLoaded = false;  public MainWindow()  {   InitializeComponent();  }  private void FileButton_Click(object sender, RoutedEventArgs e)  {   var dialog = new OpenFileDialog();   if (dialog.ShowDialog().GetValueOrDefault())   {    string filePath = dialog.FileName;    try    {     moonPdfPanel.OpenFile(filePath);     _isLoaded = true;    }    catch (Exception)    {     _isLoaded = false;    }   }  }  private void ZoomInButton_Click(object sender, RoutedEventArgs e)  {   if(_isLoaded)   {    moonPdfPanel.ZoomIn();   }  }  private void ZoomOutButton_Click(object sender, RoutedEventArgs e)  {   if(_isLoaded)   {    moonPdfPanel.ZoomOut();   }  }  private void NormalButton_Click(object sender, RoutedEventArgs e)  {   if(_isLoaded)   {    moonPdfPanel.Zoom(1.0);   }  }  private void FitToHeightButton_Click(object sender, RoutedEventArgs e)  {   moonPdfPanel.ZoomToHeight();  }  private void FacingButton_Click(object sender, RoutedEventArgs e)  {   moonPdfPanel.ViewType = MoonPdfLib.ViewType.Facing;  }  private void SinglePageButton_Click(object sender, RoutedEventArgs e)  {   moonPdfPanel.ViewType = MoonPdfLib.ViewType.SinglePage;  } }

3. 运行程序，打开PDF文件，

WPF中查看PDF文件