在iTextSharp中没有实现HR标签

本文关键字：实现 HR 标签 iTextSharp | 更新日期: 2023-09-27 18:17:51

当我使用HTMLWorker时，我有一个标签HR问题，我的代码是:

var document = new Document(PageSize.A4, 50, 50, 25, 25);
var output = new MemoryStream();
var writer = PdfWriter.GetInstance(document, output);
document.Open();
String contents = File.ReadAllText("C://TemplateCotizaciones//Cotizacion.html");
var parsedHtmlElements = HTMLWorker.ParseToList(new StringReader (contents), null);

但是，当html中包含一个标签HR时，HTMLWorker的ParseToList方法会抛出一个异常"nullReferenceException"

例如

:

输入错误
hello<br/>
<hr>
world

且无错误

hello<br/>
world

你知道为什么吗?我认为HR没有在ParseToList的代码中实现。你知道如何在html中写一行没有HR的html(由htmlworker . parsetolist)吗?

感谢您的建议和帮助

在iTextSharp中没有实现HR标签

HTMLWorker已弃用。仍然支持XMLWorker，但不是实现"html到pdf"功能的最新方式。pdfHTML是最新的iText7插件，用于将HTML转换为pdf。支持HTML5和CSS3。

一个小代码示例:

public void createPdf(String src, String dest, String resources) throws IOException {
    try {
        FileOutputStream outputStream = new FileOutputStream(dest);
        WriterProperties writerProperties = new WriterProperties();
        //Add metadata
        writerProperties.addXmpMetadata();
        PdfWriter pdfWriter = new PdfWriter(outputStream, writerProperties);
        PdfDocument pdfDoc = new PdfDocument(pdfWriter);
        pdfDoc.getCatalog().setLang(new PdfString("en-US"));
        //Set the document to be tagged
        pdfDoc.setTagged();
        pdfDoc.getCatalog().setViewerPreferences(new PdfViewerPreferences().setDisplayDocTitle(true));
        //Set meta tags
        PdfDocumentInfo pdfMetaData = pdfDoc.getDocumentInfo();
        pdfMetaData.setAuthor("Samuel Huylebroeck");
        pdfMetaData.addCreationDate();
        pdfMetaData.getProducer();
        pdfMetaData.setCreator("iText Software");
        pdfMetaData.setKeywords("example, accessibility");
        pdfMetaData.setSubject("PDF accessibility");
        //Title is derived from html
        // pdf conversion
        ConverterProperties props = new ConverterProperties();
        FontProvider fp = new FontProvider();
        fp.addStandardPdfFonts();
        fp.addDirectory(resources);//The noto-nashk font file (.ttf extension) is placed in the resources
        props.setFontProvider(fp);
        props.setBaseUri(resources);
        //Setup custom tagworker factory for better tagging of headers
        DefaultTagWorkerFactory tagWorkerFactory = new AccessibilityTagWorkerFactory();
        props.setTagWorkerFactory(tagWorkerFactory);
        HtmlConverter.convertToPdf(new FileInputStream(src), pdfDoc, props);
        pdfDoc.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

浏览http://itextpdf.com/itext7/pdfHTML

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