using Spire.Pdf;using System.Drawing;namespace PDFtoImage1{  class Program  {    static void Main(string[] args)    {      //初始化一個(gè)PdfDocument類實(shí)例,并加載PDF文檔      PdfDocument doc = new PdfDocument();      doc.LoadFromFile(@"C:/Users/Administrator/Desktop/sample.pdf");      //遍歷PDF每一頁(yè)      for (int i = 0; i < doc.Pages.Count; i++)      {        //將PDF頁(yè)轉(zhuǎn)換成Bitmap圖形        System.Drawing.Image bmp = doc.SaveAsImage(i);        //將Bitmap圖形保存為Png格式的圖片        string fileName = string.Format("Page-{0}.png", i + 1);        bmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);      }    }  }}

using System;using System.Drawing;using System.Drawing.Imaging;using Spire.Pdf;namespace SavePdfAsTiff{  class Program  {    static void Main(string[] args)    {      //創(chuàng)建一個(gè)PdfDocument類對(duì)象，并加載PDF文檔      PdfDocument document = new PdfDocument();      document.LoadFromFile(@"C:/Users/Administrator/Desktop/sample.pdf");      //調(diào)用方法SaveAsImage()將PDF文檔保存為tiff格式      JoinTiffImages(SaveAsImage(document), "result.tiff", EncoderValue.CompressionLZW);      System.Diagnostics.Process.Start("result.tiff");    }    //自定義方法SaveAsImage()將PDF文檔保存圖像文件    private static Image[] SaveAsImage(PdfDocument document)    {      Image[] images = new Image[document.Pages.Count];      for (int i = 0; i < document.Pages.Count; i++)      {        images[i] = document.SaveAsImage(i);      }      return images;    }    private static ImageCodecInfo GetEncoderInfo(string mimeType)    {      ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();      for (int j = 0; j < encoders.Length; j++)      {        if (encoders[j].MimeType == mimeType)          return encoders[j];      }      throw new Exception(mimeType + " mime type not found in ImageCodecInfo");    }    //自定義JoinTiffImages()方法，使用指定編碼器和圖像編碼器參數(shù)將圖像從pdf頁(yè)面保存到tiff圖像類型，。    public static void JoinTiffImages(Image[] images, string outFile, EncoderValue compressEncoder)    {      Encoder enc = Encoder.SaveFlag;      EncoderParameters ep = new EncoderParameters(2);      ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.MultiFrame);      ep.Param[1] = new EncoderParameter(Encoder.Compression, (long)compressEncoder);      Image pages = images[0];      int frame = 0;      ImageCodecInfo info = GetEncoderInfo("image/tiff");      foreach (Image img in images)      {        if (frame == 0)        {          pages = img;          pages.Save(outFile, info, ep);        }        else        {          ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);          pages.SaveAdd(img, ep);        }        if (frame == images.Length - 1)        {          ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.Flush);          pages.SaveAdd(ep);        }        frame++;      }    }  }}

using Spire.Pdf;using System.Drawing;using System.Drawing.Imaging;namespace PDFtoImage{  class Program  {    static void Main(string[] args)    {      //實(shí)例化一個(gè)PdfDocument類對(duì)象，并加載PDF文檔      PdfDocument doc = new PdfDocument();      doc.LoadFromFile(@"C:/Users/Administrator/Desktop/sample.pdf");      //調(diào)用方法SaveAsImage()將PDF第二頁(yè)保存為Bmp格式      Image bmp = doc.SaveAsImage(1);      //調(diào)用另一個(gè)SaveAsImage()方法，并將指定頁(yè)面保存保存為Emf、Png         Image emf = doc.SaveAsImage(0, Spire.Pdf.Graphics.PdfImageType.Metafile);      Image zoomImg = new Bitmap((int)(emf.Size.Width * 2), (int)(emf.Size.Height * 2));      using (Graphics g = Graphics.FromImage(zoomImg))      {        g.ScaleTransform(2.0f, 2.0f);        g.DrawImage(emf, new Rectangle(new Point(0, 0), emf.Size), new Rectangle(new Point(0, 0), emf.Size), GraphicsUnit.Pixel);      }      //命名保存的文件并打開      bmp.Save("convertToBmp.bmp", ImageFormat.Bmp);      System.Diagnostics.Process.Start("convertToBmp.bmp");      emf.Save("convertToEmf.emf", ImageFormat.Emf);      System.Diagnostics.Process.Start("convertToEmf.emf");      zoomImg.Save("convertToZoom.png", ImageFormat.Png);      System.Diagnostics.Process.Start("convertToZoom.png");    }  }}