如何将从pdf接收的字节数组转换为另一个pdf？ [英] How to convert Byte array received from a pdf to another pdf?

问题描述

  byte  [] bytes = System.IO.File.ReadAllBytes（ @   C：\ SGO3-1.pdf）; 
 
 
  //   MemoryStream outPDF = new MemoryStream（）;  
 FileStream outPDF =  new  FileStream（ @  C：\ pdf1.pdf，FileMode.Create）; 
  //   byte [] outBytes;  
 PdfReader pdfr =  new  PdfReader（字节）; 
 
凭证doc =  new 文档（PageSize.LETTER）; 
 
 Document.Compress =  true ; 
 
 PdfWriter writer = PdfWriter.GetInstance（doc，outPDF）; 
 
 doc.Open（）; 
 
 PdfContentByte cb = writer.DirectContent; 
 cb.SaveState（）; 
 
 PdfImportedPage页面; 
 
  for （ int  i =  1 ; i <  pdfr.NumberOfPages +  1 ; i ++）
 {
 page = writer.GetImportedPage（pdfr，i）; 
 cb.AddTemplate（page，PageSize.LETTER.Width / pdfr.GetPageSize（i）.Width， 0 ， 0 ，PageSize.LETTER.Height / pdfr.GetPageSize（i）.Height， 0 ， 0 < /跨度>）; 
 doc.NewPage（）; 
 Console.WriteLine（ 创建pdf）; 
} 

我正在尝试另一个pdf文件正在创建。但是在打开pdf时它会显示错误消息文件已损坏或无法修复

解决方案

使用BinaryReader和BinaryWriter

示例：

 字节 [] DocDataStream; 
 
 使用（FileStream stream = File.Open（OriginalPDFFileName，FileMode.Open））
 {
 使用（BinaryReader br =  new  BinaryReader（stream））
 {
 DocDataStream = br.ReadBytes （（ int ）stream.Length）; 
} 
} 
  //   PDF现在作为内存中的字节数组<使用（ var  filestream = File.OpenWrite（NewPDFFileName） {
 BinaryWriter bw =  new  BinaryWriter（filestream）; 
 bw.Write（DocDataStream， 0 ，（ int ）DocDataStream.Length）; 
 bw.Close（）; 
} 
  //  您的文件已被重写！  

byte[] bytes = System.IO.File.ReadAllBytes(@"C:\SGO3-1.pdf");
                               
           
       // MemoryStream outPDF = new MemoryStream();
            FileStream outPDF = new FileStream(@"C:\pdf1.pdf", FileMode.Create);
           // byte[] outBytes;
            PdfReader pdfr = new PdfReader(bytes);
            
                Document doc = new Document(PageSize.LETTER);
                
                    Document.Compress = true;
            
                    PdfWriter writer = PdfWriter.GetInstance(doc, outPDF);
                    
                    doc.Open();

                    PdfContentByte cb = writer.DirectContent;
                    cb.SaveState();

                    PdfImportedPage page;

                    for (int i = 1; i < pdfr.NumberOfPages + 1; i++)
                    {
                        page = writer.GetImportedPage(pdfr, i);
                        cb.AddTemplate(page, PageSize.LETTER.Width / pdfr.GetPageSize(i).Width, 0, 0, PageSize.LETTER.Height / pdfr.GetPageSize(i).Height, 0, 0);
                        doc.NewPage();
                        Console.WriteLine("creating pdf");
                    }

I am trying this another pdf file is being created.But while opening pdf it gives error message File is damaged or could not be repaired

解决方案

Use BinaryReader and BinaryWriter
example:

Byte[] DocDataStream;

using (FileStream stream = File.Open(OriginalPDFFileName, FileMode.Open))
                    {
                        using (BinaryReader br = new BinaryReader(stream))
                        {
                            DocDataStream = br.ReadBytes((int)stream.Length);
                        }
                    }
// The PDF is now as Byte Array in memory

 using (var filestream = File.OpenWrite(NewPDFFileName))
            {
                BinaryWriter bw = new BinaryWriter(filestream);
                bw.Write(DocDataStream, 0, (int)DocDataStream.Length);
                bw.Close();
            }					
// And your file is rewritten!			

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