基于WPF實現(xiàn)PDF的顯示與轉(zhuǎn)換

更新時間：2023年12月15日 10:22:43 作者：qq1326702940

這篇文章為大家詳細主要介紹了如何基于WPF實現(xiàn)PDF的顯示并轉(zhuǎn)換成圖片,文中的示例代碼講解詳細,感興趣的小伙伴可以跟隨小編一起學習一下

1.NuGet安裝

O2S.Components.PDFView4NET.WPF

2.添加組件

工具箱中，空白處右鍵，選擇項

WPF組件界面，選擇NuGet安裝庫對面路徑下的 O2S.Components.PDFView4NET.WPF.dll

3.引入組件命名空間并使用

<Window
        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:local="clr-namespace:PDFView"
        xmlns:PageViewWPF="clr-namespace:O2S.Components.PDFView4NET.WPF;assembly=O2S.Components.PDFView4NET.WPF"
        x:Class="PDFView.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
 
        <PageViewWPF:PDFPageView x:Name="PdfControl" HorizontalAlignment="Left" Height="auto" VerticalAlignment="Top" Width="auto" PageDisplayLayout="Custom"  WorkMode="PanAndScan" HighlightFormFields="True"/>
 
    </Grid>
</Window>

using O2S.Components.PDFView4NET;
using System.Windows;
 
namespace PDFView
{
    /// <summary>
    /// MainWindow.xaml 的交互邏輯
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
 
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            PdfControl.Document = new PDFDocument() { FilePath = ".\\4.pdf" };
        }
    }
}

4.PDF轉(zhuǎn)換成圖片

聽說有破解版（無水印），找到了兩個版本兩個不同O2S.Components.PDFRender4NET破解版

版本2.0.1.0 對于測試PDF，使用正常

版本4.5.1.2 對于測試PDF，使用異常

PdfToImage(".\\4.pdf", Environment.CurrentDirectory, "4", ImageFormat.Png, Definition.Eight);

/// <summary>
        /// PDF文檔所有頁全部轉(zhuǎn)換為圖片
        /// </summary>
        /// <param name="pdfInputPath">PDF文件流</param>
        /// <param name="imageOutputPath">圖片輸出路徑</param>
        /// <param name="imageName">生成圖片的名字</param>
        /// <param name="imageFormat">設置所需圖片格式</param>
        /// <param name="definition">設置圖片的清晰度，數(shù)字越大越清晰</param>
        public static void PdfToImage(string pdfStream, string imageOutputPath, string imageName, ImageFormat imageFormat, Definition definition)
        {
            PDFFile pdfFile = PDFFile.Open(pdfStream);
            int startPageNum = 1;
            int endPageNum = pdfFile.PageCount;
            for (int i = startPageNum; i <= endPageNum; i++)
            {
                try
                {
                    Bitmap pageImage = pdfFile.GetPageImage(i - 1, 56 * (int)definition);
 
                    int canKao = pageImage.Width > pageImage.Height ? pageImage.Height : pageImage.Width;
                    int newHeight = canKao > 1080 ? pageImage.Height / 2 : pageImage.Height;
                    int newWidth = canKao > 1080 ? pageImage.Width / 2 : pageImage.Width;
                    Bitmap newPageImage = new Bitmap(newWidth, newHeight);
 
                    Graphics g = Graphics.FromImage(newPageImage);
                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
 
                    g.DrawImage(pageImage, new Rectangle(0, 0, newWidth, newHeight),
                    new Rectangle(0, 0, pageImage.Width, pageImage.Height), GraphicsUnit.Pixel);
                    newPageImage.Save(imageOutputPath + imageName + (endPageNum >= 2 ? ("-" + i) : "") + "." + imageFormat);//+ i.ToString() imageFormat
                    g.Dispose();
                    newPageImage.Dispose();
                    pageImage.Dispose();
                }
                catch (Exception ex)
                {
                    string ss = ex.ToString();
                }
            }
 
            pdfFile.Dispose();
        }
 
        /// <summary>
        /// 轉(zhuǎn)換的圖片清晰度，1最不清醒，10最清晰
        /// </summary>
        public enum Definition
        {
            One = 1, Two = 2, Three = 3, Four = 4, Five = 5, Six = 6, Seven = 7, Eight = 8, Nine = 9, Ten = 10
        }