将表格添加到PdfStamper.AcroFields iTextSharp

Question

我开始使用iTextSharp，并且在做一些非常简单的事情时遇到了麻烦。我有我与PdfStamper填充像这样

PdfReader rdr = new PdfReader(@"C:\temp\Template.pdf"); 
PdfStamper stamper = new PdfStamper(rdr, new System.IO.FileStream(path = @"C:\temp\Created.pdf", System.IO.FileMode.Create)); 
stamper.AcroFields.SetField("softwarename", "Software"); 
stamper.FormFlattening = true; 
AcroFields form = stamper.AcroFields; 
form.GenerateAppearances = true; 
stamper.Close(); 
rdr.Close();  

我希望能有一个名为“网格”或类似的东西领域，并与PdfPTable与所有的格式不变（我填充它的模板知道我可以用字符串完成所有事情，但我不想那么做）。有没有一种首选的方法来做到这一点？

Answer 1

PDFStamper文档说它将允许所有对象，所以我将使用对象（或对象列表）和标志的组合。这样你就可以通过你需要的所有信息，根据你需要的任何逻辑来操纵它。

以下代码将使用PdfPTable将图像放置在网页顶部的同一网格中。

然后您可以使用PdfTemplate并使用WriteSelectedRows方法将PdfPTable的内容写入它。

 PdfPTable table; 
     string inputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "input.pdf"); 
     string outputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "output.pdf"); 

List<ImageTextSharpModel> images 

PdfPTable table = new PdfPTable(images.Count); 
        table.WidthPercentage = 100; 
        table.HorizontalAlignment = Element.ALIGN_RIGHT; 

        for (var i = 0; i < images.Count; i++) 
        { 

         var image = images[i]; 
         try 
         { 
          PdfPCell cell = new PdfPCell(); 
          cell.BorderWidth = 0; 
          cell.FixedHeight = image.Height; 
          cell.VerticalAlignment = Element.ALIGN_MIDDLE;         
          Paragraph p = new Paragraph(); 

          float offset = 0; 

          var img = iTextSharp.text.Image.GetInstance(image.AbsolutePath); 
          img.ScaleToFit(image.Width, image.Height); 

          //Manually setting the location 
          if (image.Alignment == iTextSharp.text.Image.RIGHT_ALIGN) 
          { 
           offset = i == 0 
            ? (((doc.PageSize.Width/images.Count) - doc.LeftMargin) - img.ScaledWidth) 
            : (((doc.PageSize.Width/images.Count) - doc.LeftMargin) - img.ScaledWidth) - cell.Width; 
          } 
          else if (image.Alignment == iTextSharp.text.Image.ALIGN_CENTER) 
          { 
           if (images.Count == 1) 
           { 
            offset = ((doc.PageSize.Width - img.ScaledWidth)/2) - doc.LeftMargin; 
           } 
           else 
           { 
            offset = (((doc.PageSize.Width/images.Count) - img.ScaledWidth)/2); 
           } 
          }  

          p.Add(new Chunk(img, offset, 0)); 
          cell.AddElement(p); 
          table.AddCell(cell); 
         } 
         catch (Exception ex) 
         { 
          //Ignore 
         } 
        } 
; 

      //add table to stamper 
iTextSharp.text.pdf.PdfReader pdfReader = new  iTextSharp.text.pdf.PdfReader(inputFile); 
using (FileStream fs = new FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.None)) 
{ 
    using (PdfStamper stamper = new PdfStamper(pdfReader, fs)) 
     { 
       int PageCount = pdfReader.NumberOfPages; 
       for (int x = 1; x <= PageCount; x++) 
       { 

        PdfContentByte canvas = stamper.GetOverContent(x); 
        PdfTemplate tableTemplate = canvas.CreateTemplate(1500, 1300); 
        table.WriteSelectedRows(0, -1, 0, 1300, tableTemplate); 

       } 

       stamper.Close(); 
      } 
     }