添加 Table 到 PdfStamper.AcroFields iTextSharp

Add Table to PdfStamper.AcroFields iTextSharp

我开始使用 iTextSharp,但在做一些非常简单的事情时遇到了麻烦。我有一个用 PdfStamper 填充的模板,就像这样

 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();     

我希望能够有一个名为 "grid" 或类似名称的字段,并用一个格式完整的 PdfPTable 填充它(我知道我可以用字符串完成所有操作,但我不'想要那个)。有更好的方法吗?

PDFStamper 文档说它接受所有允许的对象,所以我会结合使用对象(或对象列表)和标志。这样你就可以传递你需要的所有信息,并根据你需要的任何逻辑对其进行操作。

以下代码将使用 PdfPTable 将图像均匀地放置在页面顶部的网格中。

然后就可以使用PdfTemplate,使用WriteSelectedRows方法将PdfPTable的内容写入其中

        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();
            }
        }