是否可以使用Document doc.Add（pdf）？

我正在尝试将pdf添加到另一个pdf中。文档doc.Add（IElement）是我知道要做的，而且我无法添加pdf。我试图添加图像，并工作。如何将pdf文件添加到我的文档？是否可以使用Document doc.Add（pdf）？

iTextSharp.text.Image img; 
foreach (var buf in List) { 
    myDoc.NewPage(); 
    img = iTextSharp.text.Image.GetInstance(buf); 
    img.ScaleToFit(612f, 792f); 
    img.Alignment = iTextSharp.text.Image.ALIGN_CENTER | iTextSharp.text.Image.ALIGN_MIDDLE; 
    myDoc.Add(img); 
}

来源

2011-11-22 MrM

你不能使用Document.Add()，但它仍然很容易。首先，您需要创建一个PdfReader对象来阅读您的源文档。然后使用目标文档的PdfWriter，并在要导入的每个页面上调用其GetImportedPage(reader, pageNumber)方法。这会给你一个PdfImportedPage对象，你可以传递给PdfWriter.DirectContent.AddTemplate()。

下面是一个完整的C＃2010 WinForms应用程序，针对iTextSharp 5.1.1.0，展示了所有这些步骤。首先创建一个示例文件（File1），然后创建第二个文件（File2）并向其中添加第一个文件。它还做了一些额外的事情来展示一些边缘案例，特别是如何处理旋转的页面。请参阅代码注释以了解具体的细节。

using System; 
using System.Text; 
using System.Windows.Forms; 
using System.IO; 
using iTextSharp.text; 
using iTextSharp.text.pdf; 

namespace WindowsFormsApplication1 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 
      //The names of the two files that we'll create 
      string File1 = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "File1.pdf"); 
      string File2 = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "File2.pdf"); 

      //Create a test file to merge into the second file 
      using (FileStream fs = new FileStream(File1, FileMode.Create, FileAccess.Write, FileShare.None)) 
      { 
       //We'll create this one landscape to show some checks that need to be done later 
       using (Document doc = new Document(PageSize.TABLOID.Rotate())) 
       { 
        using (PdfWriter writer = PdfWriter.GetInstance(doc, fs)) 
        { 
         doc.Open(); 
         doc.Add(new Paragraph("File 1")); 
         doc.Close(); 
        } 
       } 
      } 

      //Create our second file 
      using (FileStream fs = new FileStream(File2, FileMode.Create, FileAccess.Write, FileShare.None)) 
      { 
       //Create this one as a regular US Letter portrait sized document 
       using (Document doc = new Document(PageSize.LETTER)) 
       { 
        using (PdfWriter writer = PdfWriter.GetInstance(doc, fs)) 
        { 
         doc.Open(); 

         doc.Add(new Paragraph("File 2")); 

         //Create a PdfReader to read our first file 
         PdfReader r = new PdfReader(File1); 

         //Store the number of pages 
         int pageCount = r.NumberOfPages; 

         //Variables which will be set in the loop below 
         iTextSharp.text.Rectangle rect; 
         PdfImportedPage imp; 

         //Loop through each page in the source document, remember that page indexes start a one and not zero 
         for (int i = 1; i <= pageCount; i++) 
         { 
          //Get the page's dimension and rotation 
          rect = r.GetPageSizeWithRotation(i); 

          //Get the actual page 
          imp = writer.GetImportedPage(r, i); 

          //These two commands must happen in this order 
          //First change the "default page size" to match the current page's size 
          doc.SetPageSize(rect); 
          //then add a new blank page which we'll fill with our actual page 
          doc.NewPage(); 

          //If the document has been rotated one twist left or right (90 degrees) then we need to add it a little differently 
          if (rect.Rotation == 90 || rect.Rotation == 270) 
          { 
           //Add the page accounting for the rotation 
           writer.DirectContent.AddTemplate(imp, 0, -1, 1, 0, 0, rect.Height); 
          } 
          else 
          { 
           //Add the page normally 
           writer.DirectContent.AddTemplate(imp, 0, 0); 
          } 

         } 

         doc.Close(); 
        } 
       } 
      } 
      this.Close(); 
     } 
    } 
}

来源

2011-11-22 15:23:33

是否可以使用Document doc.Add（pdf）？

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