为什么iTextSharp会重新调整我的文档大小而不仅仅是合并它们?

时间:2010-10-06 18:50:05

标签: itextsharp itext

示例代码:

using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using iTextSharp.text;
using iTextSharp.text.pdf;

namespace MergePDFs
{
    class Program
    {
        static void Main(string[] args)
        {

            try
            {
                int f = 1;
                // we create a reader for a certain document
                PdfReader reader = new PdfReader(args[f]);
                // we retrieve the total number of pagse
                int n = reader.NumberOfPages;
                Console.WriteLine("There are " + n + " pages in the original file.");
                // step 1: creation of a document-object
                Document document = new Document(reader.GetPageSizeWithRotation(1));
                Console.WriteLine("PS: " + reader.GetPageSizeWithRotation(1));
                // step 2: we create a writer that listens to the document
                String destinationFile = args[0];//The first argument is the destination
                PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(destinationFile, FileMode.Create));
                // step 3: we open the document
                document.Open();
                PdfContentByte cb = writer.DirectContent;
                PdfImportedPage page;
                int rotation;
                // step 4: we add content
                while (f < args.Length)
                {
                    int i = 0;
                    while (i < n)
                    {
                        i++;
                        //document.SetPageSize(reader.GetPageSizeWithRotation(i));
                        document.NewPage();
                        page = writer.GetImportedPage(reader, i);
                        rotation = reader.GetPageRotation(i);
                        if (rotation == 90 || rotation == 270)
                        {
                            cb.AddTemplate(page, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(i).Height);
                        }
                        else
                        {
                            cb.AddTemplate(page, 1f, 0, 0, 1f, 0, 0);
                        }
                        Console.WriteLine("Processed page " + i);
                    }
                    f++;
                    if (f < args.Length)
                    {
                        reader = new PdfReader(args[f]);
                        // we retrieve the total number of pages
                        n = reader.NumberOfPages;
                        Console.WriteLine("There are " + n + " pages in the original file.");
                    }
                }
                // step 5: we close the document
                document.Close();
            }
            catch (Exception e)
            {
                Console.Error.WriteLine(e.Message);
                Console.Error.WriteLine(e.StackTrace);
            }
        }
    }
}

我希望这会输出一个与两个文件相同尺寸的文件(在我的情况下是相同的尺寸)。不幸的是,这种情况并没有发生,并且在合并文档周围打印出白色边框。任何帮助将不胜感激。

2 个答案:

答案 0 :(得分:1)

原始PDF完全有可能除了媒体盒之外还有裁剪框。

如果你真的只想复制文件A&amp; B进入文件C,使用PdfCopy。

来自http://itextpdf.com/examples/iia.php?id=123

    String[] files = { MovieLinks1.RESULT, MovieHistory.RESULT };
    // step 1
    Document document = new Document();
    // step 2
    PdfCopy copy = new PdfCopy(document, new FileOutputStream(RESULT));
    // step 3
    document.open();
    // step 4
    PdfReader reader;
    int n;
    // loop over the documents you want to concatenate
    for (int i = 0; i < files.length; i++) {
        reader = new PdfReader(files[i]);
        // loop over the pages in that document
        n = reader.getNumberOfPages();
        for (int page = 0; page < n; ) {
            copy.addPage(copy.getImportedPage(reader, ++page));
        }
    }
    // step 5
    document.close();

此技术将保留注释(包括字段,但如果要在PROPERLY周围移动字段,则应该使用PdfCopyFields),而不是书签。我不确定层......我想是的。

哦,你可能想在完成每一个之后添加copy.freeReader(reader) ...特别是如果你计划循环使用它们的话。

答案 1 :(得分:0)

尝试

cb.AddTemplate(page, 0, 0);