如何使用itextsharp合并两个Document对象

时间:2013-10-28 21:17:55

标签: c# asp.net-mvc itextsharp

我有两个Document个对象

如何使用itextsharp合并这两个Document个对象?

2 个答案:

答案 0 :(得分:1)

根据哈斯先生(在他的代码的帮助下,在某处),

“不幸的是,据我所知,没有办法合并两个Document对象。这些对象是帮助类,它们抽象出PDF文件格式的复杂性。这些抽象的”成本“之一是您只能使用单个文档。但是,正如其他人所指出的那样,您可以创建单独的PDF(甚至是内存中),然后合并它们。“

所以我做到了这一点:

我使用了PdfCopyFields对象。

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())

我这样做是因为MemoryString已关闭。

答案 1 :(得分:0)

口感更轻松一点:

您必须获取PDF文档内存流并将它们合并在一起!

这是一个简单的功能,可以实现这一目标!

        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());

        }