C#实现TIF图像转PDF文件的方法

using System;using System.Collections.Generic;using System.IO;using iTextSharp.text;using iTextSharp.text.pdf;using iTextSharp.text.pdf.codec;namespace TIFtoPDF{ class Program {  //将多个tif文件合并成一个pdf文件  private static void tifToPdf(IEnumerable<string> arr, string sFilePdf)  {   FileInfo _toFile = new FileInfo(sFilePdf);   // 创建一个文档对象   Document doc = new Document(PageSize.A3, 0, 0, 0, 0);   int pages = 0;   FileStream fs=new FileStream(sFilePdf,FileMode.OpenOrCreate);   // 定义输出位置并把文档对象装入输出对象中   PdfWriter writer = PdfWriter.GetInstance(doc, fs);   // 打开文档对象   doc.Open();   foreach(string sFileTif in arr)   {    PdfContentByte cb = writer.DirectContent;    RandomAccessFileOrArray ra = new RandomAccessFileOrArray(sFileTif);    int comps = TiffImage.GetNumberOfPages(ra);    for (int c = 0; c < comps; ++c)    {     Image img = TiffImage.GetTiffImage(ra, c + 1);     if (img != null)     {      img.ScalePercent(7200f / img.DpiX, 7200f / img.DpiY);      doc.SetPageSize(new Rectangle(img.ScaledWidth, img       .ScaledHeight));      img.SetAbsolutePosition(0,0);      cb.AddImage(img);      doc.NewPage();      ++pages;     }    }    ra.Close();// 关闭   }   // 关闭文档对象，释放资源   doc.Close();  }  public static void Main(string[] args)  {   tifToPdf(new string[]{@"C:/test.tif"},@"C:/test.pdf");  } }}