WPF 显示PDF、PDF转成图片

1.NuGet 安装 O2S.Components.PDFView4NET.WPF

2.添加组件

工具箱中，空白处 右键，选择项

WPF组件 界面，选择NuGet安装库对面路径下的  O2S.Components.PDFView4NET.WPF.dll

3.引入组件命名空间，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 的交互逻辑
    /// </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转换成图片

听说有破解版（无水印），找到了两个版本两个不同O2S.Components.PDFRender4NET破解版

版本2.0.1.0 对于测试PDF，使用正常

版本4.5.1.2 对于测试PDF，使用异常

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

/// <summary>
        /// PDF文档所有页全部转换为图片
        /// </summary>
        /// <param name="pdfInputPath">PDF文件流</param>
        /// <param name="imageOutputPath">图片输出路径</param>
        /// <param name="imageName">生成图片的名字</param>
        /// <param name="imageFormat">设置所需图片格式</param>
        /// <param name="definition">设置图片的清晰度，数字越大越清晰</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>
        /// 转换的图片清晰度，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
        }

5.附上官方代码库链接

PDFView4NET https://github.com/o2solutions/pdfview4net/tree/main