如何使用iTextSharp的

Question

我有兩個Document對象

如何使用一個合併iTextSharp的這兩個Document對象合併兩個文檔對象？

Answer 1

上齶有一點更容易：

你必須採取PDF文檔存儲流，並將它們合併起來！

這是一個簡單的功能，可以實現這個功能！

 public MemoryStream MemoryStreamMerger(List<MemoryStream> streams) 
     { 

      MemoryStream OurFinalReturnedMemoryStream; 
      using (OurFinalReturnedMemoryStream = new MemoryStream()) 
      { 
       //Create our copy object 
       PdfCopyFields copy = new PdfCopyFields(OurFinalReturnedMemoryStream); 

       //Loop through each MemoryStream 
       foreach (MemoryStream ms in streams) 
       { 
        //Reset the position back to zero 
        ms.Position = 0; 
        //Add it to the copy object 
        copy.AddDocument(new PdfReader(ms)); 
        //Clean up 
        ms.Dispose(); 
       } 
       //Close the copy object 
       copy.Close(); 

       //Get the raw bytes to save to disk 
       //bytes = finalStream.ToArray(); 
      } 
      return new MemoryStream(OurFinalReturnedMemoryStream.ToArray()); 

     } 

Answer 2

按照哈斯先生（與他的代碼幫助某處SO），

「不幸的是，據我所知，沒有辦法合併兩個文檔對象。這些對象是輔助類它抽象出PDF文件格式的複雜性，這些抽象的「成本」之一是你僅限於單個文檔，但正如其他人指出的那樣，你可以創建單獨的PDF（甚至在內存中）和然後合併它們。「

所以我就是這樣做的：

我用PdfCopyFields對象。

MemoryStream realfinalStream = new MemoryStream(); 
MemoryStream[] realstreams = { stream,new MemoryStream(finalStream.ToArray()) }; 

using (realfinalStream) 
     { 
      //Create our copy object 
      PdfCopyFields copy = new PdfCopyFields(realfinalStream); 

      //Loop through each MemoryStream 
      foreach (MemoryStream ms in realstreams) 
      { 
       //Reset the position back to zero 
       ms.Position = 0; 
       //Add it to the copy object 
       copy.AddDocument(new PdfReader(ms)); 
       //Clean up 
       ms.Dispose(); 
      } 
      //Close the copy object 
      copy.Close(); 
     } 
return File(new MemoryStream(realfinalStream.ToArray()), "application/pdf","hello.pdf"); 

FYI

new MemoryStream(realfinalStream.ToArray()) 

我這樣做，是因爲MemoryString被關閉。