简述

  软件的帮助文档可借助第三方软件如PDF Reader、Adobe PDF等显示，但客户机上需安装此类软件。WPF开发的软件可借助第三方库 MoonPdf 将PDF文档加载显示到软件窗口中（Dll下载地址，GitHub源码地址）。

MoonPdf库使用方式：将MoonPdfLib.dll、libmupdf.dll、MouseKeyboardActivityMonitor.dll放置于WPF工程Bin文件下；在项目工程中“引用”右键添加新引用：MoonPdfLib.dll；在.xmal及.cs文件中添加相关引用，详见代码。代码

PDFViewer.xaml

<UserControl x:Class="NovelRPS.PdfViewer" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mpp="clr-namespace:MoonPdfLib;assembly=MoonPdfLib" mc:Ignorable="d" > <Grid> <!-- ContextMenu --> <Grid.ContextMenu> <ContextMenu> <MenuItem x:Name="ZoomToOrigin" Header="100%" Click="ZoomToOrigin_Click"></MenuItem> <MenuItem x:Name="SinglePage" Header="单页" Click="SinglePage_Click"></MenuItem> <MenuItem x:Name="DoublePage" Header="双页" Click="DoublePage_Click"></MenuItem> </ContextMenu> </Grid.ContextMenu> <Border> <!-- 参考：https://www.cnblogs.com/yang-fei/p/4885570.html --> <mpp:MoonPdfPanel x:Name="pdfViewer" MaxZoomFactor="2.5" ViewType="SinglePage" PageRowDisplay="ContinuousPageRows" PageMargin="0,2,4,2" AllowDrop="True"></mpp:MoonPdfPanel> </Border> </Grid></UserControl>

PDFViewer.cs

using MoonPdfLib; //记得引用此命名空间public partial class PdfViewer : UserControl { private bool m_bLoaded = false; public PdfViewer() { InitializeComponent(); } public bool LoadPdfDoc( string strPdfPath ) { try { this.pdfViewer.OpenFile( strPdfPath ); this.pdfViewer.Zoom( 1.0 ); m_bLoaded = true; } catch { m_bLoaded = false; } return m_bLoaded; } private void ZoomToOrigin_Click( object sender, RoutedEventArgs e ) { if ( !m_bLoaded ) return; this.pdfViewer.Zoom( 1.0 ); } private void SinglePage_Click( object sender, RoutedEventArgs e ) { if ( !m_bLoaded ) return; this.pdfViewer.ViewType = ViewType.SinglePage; } private void DoublePage_Click( object sender, RoutedEventArgs e ) { if ( !m_bLoaded ) return; this.pdfViewer.ViewType = ViewType.Facing; } }

调用PdfViewer，及HelpWin窗口类：HelpWin.xaml

<Window x:Class="NovelRPS.HelpWin" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:NovelRPS" Title="HelpWin" Background="#FF212121" WindowState="Maximized" Topmost="True" WindowStyle="None" ResizeMode="NoResize"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="66"></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <!-- Title --> <Label x:Name="Title" Grid.Row="0" Background="#FF414141" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" Padding="0"> <DockPanel> <Image DockPanel.Dock="Left" Source="Images/SubPageLogo.png"></Image> <Image x:Name="ImgClose" DockPanel.Dock="Right" Source="Images/Close.png" MouseDown="ImgClose_MouseDown"></Image> <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center"> <Image Source="Images/Setting/Help.png" Width="30"></Image> <Label Content="帮助" FontSize="26" FontWeight="Bold"></Label> </StackPanel> </DockPanel> </Label> <!-- Content --> <Label Grid.Row="1" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch"> <local:PdfViewer x:Name="PDFView" Loaded="PDFView_Loaded"/> </Label> </Grid></Window>

HelpWin.cs

public partial class HelpWin : Window { private string m_strPdfPath = AppDomain.CurrentDomain.BaseDirectory + "help.pdf"; public HelpWin() { InitializeComponent(); } private void ImgClose_MouseDown( object sender, MouseButtonEventArgs e ) { this.Close(); } private void PDFView_Loaded( object sender, RoutedEventArgs e ) { if ( !this.PDFView.LoadPdfDoc( m_strPdfPath ) ) { MessageBox.Show( "打开帮助文档失败，请重试！" ); } } }效果