itextsharp.xmlworker yerleşik resimler oluşturabilir mi?

HTML ve dinamik görüntüler kullanarak dinamik PDF belgeleri oluşturmak istiyorum. Kodum standart HTML ve görüntüler için tam yolları ile çalışıyor, ama ben hatayıitextsharp.xmlworker yerleşik resimler oluşturabilir mi?

durum ayrıntıları almak belgede görüntü satır içi gömmek çalıştığınızda: System.IO.IOException: Belge sayfa yok .

Görüntü başına bir HTTP çağrısı olmadan görüntüleri katıştırmanın bir yolu var mı? Bunu istemiyorum çünkü ölçeklenebilirlik sorunlarına ve görüntülerin hassas olmasına neden olacağını düşünüyorum. İşte

IOException verir benim kodudur:

Biz tabanının 64 görüntüleri işleme desteklemek için kendi ImageTagProcessor yazmaya gerek

public ActionResult MakePdf() 
    { 
     string html = @"<?xml version=""1.0"" encoding=""UTF-8""?> 
      <!DOCTYPE html 
       PUBLIC ""-//W3C//DTD XHTML 1.0 Strict//EN"" 
       ""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd""> 
      <html xmlns=""http://www.w3.org/1999/xhtml"" xml:lang=""en"" lang=""en""> 
       <head> 
        <title>Minimal XHTML 1.0 Document with W3C DTD</title> 
       </head> 
       <body><img src='data:image/png;base64,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' width='62' height='80' style='float: left; margin-right: 28px;' /></body></html>"; 

     var bytes = Encoding.UTF8.GetBytes(html); 

     using (MemoryStream input = new MemoryStream(bytes)) 
     { 
      MemoryStream output = new MemoryStream(); 
      using (Document document = new Document(PageSize.LETTER, 50, 50, 50, 50)) 
      { 
       using (PdfWriter writer = PdfWriter.GetInstance(document, output)) 
       { 
        writer.CloseStream = false; 
        document.Open(); 

        XMLWorkerHelper xmlWorker = XMLWorkerHelper.GetInstance(); 
        xmlWorker.ParseXHtml(writer, document, input, null); 
        document.Close(); 
        output.Position = 0; 

        return new FileStreamResult(output, "application/pdf"); 
       } 
      } 
     } 
    }

kaynak

2013-10-15 David Silva Smith

: Sonra içine bu yeni işlemciyi enjekte edebilir

public class CustomImageTagProcessor : iTextSharp.tool.xml.html.Image 
{ 
    public override IList<IElement> End(IWorkerContext ctx, Tag tag, IList<IElement> currentContent) 
    { 
     IDictionary<string, string> attributes = tag.Attributes; 
     string src; 
     if (!attributes.TryGetValue(HTML.Attribute.SRC, out src)) 
      return new List<IElement>(1); 

     if (string.IsNullOrEmpty(src)) 
      return new List<IElement>(1); 

     if (src.StartsWith("data:image/", StringComparison.InvariantCultureIgnoreCase)) 
     { 
      // data:[<MIME-type>][;charset=<encoding>][;base64],<data> 
      var base64Data = src.Substring(src.IndexOf(",") + 1); 
      var imagedata = Convert.FromBase64String(base64Data); 
      var image = iTextSharp.text.Image.GetInstance(imagedata); 

      var list = new List<IElement>(); 
      var htmlPipelineContext = GetHtmlPipelineContext(ctx); 
      list.Add(GetCssAppliers().Apply(new Chunk((iTextSharp.text.Image)GetCssAppliers().Apply(image, tag, htmlPipelineContext), 0, 0, true), tag, htmlPipelineContext)); 
      return list; 
     } 
     else 
     { 
      return base.End(ctx, tag, currentContent); 
     } 
    } 
}

HtmlPipelineContext:

 using (var doc = new Document(PageSize.A4)) 
     { 
      var writer = PdfWriter.GetInstance(doc, new FileStream("test.pdf", FileMode.Create)); 
      doc.Open(); 
      var html = @"<img src='data:image/png;base64,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' width='62' height='80' style='float: left; margin-right: 28px;' />"; 

      var tagProcessors = (DefaultTagProcessorFactory)Tags.GetHtmlTagProcessorFactory(); 
      tagProcessors.RemoveProcessor(HTML.Tag.IMG); // remove the default processor 
      tagProcessors.AddProcessor(HTML.Tag.IMG, new CustomImageTagProcessor()); // use our new processor 

      CssFilesImpl cssFiles = new CssFilesImpl(); 
      cssFiles.Add(XMLWorkerHelper.GetInstance().GetDefaultCSS()); 
      var cssResolver = new StyleAttrCSSResolver(cssFiles); 
      cssResolver.AddCss(@"code { padding: 2px 4px; }", "utf-8", true); 
      var charset = Encoding.UTF8; 
      var hpc = new HtmlPipelineContext(new CssAppliersImpl(new XMLWorkerFontProvider())); 
      hpc.SetAcceptUnknown(true).AutoBookmark(true).SetTagFactory(tagProcessors); // inject the tagProcessors 
      var htmlPipeline = new HtmlPipeline(hpc, new PdfWriterPipeline(doc, writer)); 
      var pipeline = new CssResolverPipeline(cssResolver, htmlPipeline); 
      var worker = new XMLWorker(pipeline, true); 
      var xmlParser = new XMLParser(true, worker, charset); 
      xmlParser.Parse(new StringReader(html)); 
     } 
     Process.Start("test.pdf");

kaynak

2013-10-16 08:22:08 VahidN

Güzel iş! Çalışmak için özel bir IImageProvider almaya çalışıyordum ama özel bir img 'etiketi denemek için hiç düşünmemiştim! –

Harika! Bu sabah http://demo.itextsupport.com/xmlworker/itextdoc/flatsite.html adresini okudum ancak henüz uygulamaya başlamadım. Hızlı cevabınız için teşekkür ederim! –

Gread örneği. Ancak kod harika çalışıyor ancak Acrobat Reader'da ilk sayfa doğru bir şekilde oluşturulmuyor. Metin gösterilmiyor. Bununla ilgili bilinen bir sorun var mı? – dixus

  string originalFile = "Original1.pdf"; 
      string copyOfOriginal = "Re-copia.pdf"; 

      byte[] bytes = Convert.FromBase64String(archivo); 

      System.IO.FileStream stream = new FileStream(originalFile, FileMode.CreateNew); 
      System.IO.BinaryWriter writer = new BinaryWriter(stream); 
      writer.Write(bytes, 0, bytes.Length); 
      writer.Close(); 

      PdfReader reader1 = new PdfReader(originalFile); 
      using (FileStream fs = new FileStream(copyOfOriginal, FileMode.Create, FileAccess.Write, FileShare.None)) 
      // Creating iTextSharp.text.pdf.PdfStamper object to write 
      // Data from iTextSharp.text.pdf.PdfReader object to FileStream object 
      using (PdfStamper stamper = new PdfStamper(reader1, fs)) 
      { 

       int pageCount = reader1.NumberOfPages; 

       // Create New Layer for Watermark 
       PdfLayer layer = new PdfLayer("WatermarkLayer", stamper.Writer); 
       // Loop through each Page 
       for (int i = pageCount; i <= pageCount; i++) 
       { 
        // Getting the Page Size 
        Rectangle rect = reader1.GetPageSize(i); 



        // Get the ContentByte object 
        PdfContentByte cb = stamper.GetUnderContent(i); 

        // Tell the cb that the next commands should be "bound" to this new layer 
        cb.BeginLayer(layer); 
        cb.SetFontAndSize(BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED), 50); 

        PdfGState gState = new PdfGState(); 
        cb.SetGState(gState); 


        string codbartest = codBarras; 
        BarcodePDF417 bcpdf417 = new BarcodePDF417(); 
        //Asigna el código de barras en base64 a la propiedad text del objeto.. 
        bcpdf417.Text = ASCIIEncoding.ASCII.GetBytes(codbartest); 
        Image imgpdf417 = bcpdf417.GetImage(); 
        imgpdf417.SetAbsolutePosition(50, 50); 
        imgpdf417.ScalePercent(100); 
        cb.AddImage(imgpdf417); 
        // Close the layer 
        cb.EndLayer(); 
       }[enter image description here][1]

kaynak

2017-12-06 17:30:41

cevabınız tamamen op html-pdf kullanımında bu soruyu soruyor ... – mkl

itextsharp.xmlworker yerleşik resimler oluşturabilir mi?

cevap

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