PDF 不呈现 Html Css ASP.NET答案

【问题标题】：PDF Not Rendering Html Css ASP.NETPDF 不呈现 Html Css ASP.NET
【发布时间】：2016-08-22 06:17:10
【问题描述】：

大家好，我正在从我的 html 内容生成 PDF 格式的付款发票订单，并使用以下代码通过电子邮件发送：

    ***//Generates PDF Payment Invoice***       
    StringBuilder sb = new StringBuilder();
    sb.Append(@"<meta http-equiv=""Content-Type"" content=""text/html; charset=utf-8"">");      
    sb.Append(boletoBancario.MontaHtml());

    StringReader sr = new StringReader(sb.ToString());

    Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);

    HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
    byte[] bytes;

    memoryStream = new MemoryStream();

    PdfWriter writer = PdfWriter.GetInstance(pdfDoc, memoryStream);
    pdfDoc.Open();

    iTextSharp.text.html.simpleparser.StyleSheet ST = new iTextSharp.text.html.simpleparser.StyleSheet();
    ST.LoadTagStyle("body", "encoding", "Identity-H");
    htmlparser.SetStyleSheet(ST);
    htmlparser.Parse(sr);            

    pdfDoc.Close();
    bytes = memoryStream.ToArray();
    memoryStream.Close();                       
    memoryStream = new MemoryStream(bytes);


    ***//Sends E-mail with PDF PAYMENT INVOICE Attached***
    MailAddress de = new MailAddress(enderecoOrigem, HttpUtility.HtmlDecode(nomeOrigem));
    MailAddress para = new MailAddress(enderecoDestino, HttpUtility.HtmlDecode(nomeDestino));

    MailMessage mensagem = new MailMessage(de, para);
    NetworkCredential credential = new NetworkCredential(usuarioConta, senhaConta);
    SmtpClient smtp = new SmtpClient();
    smtp.Host = servidorSMTP;
    smtp.Port = Convert.ToInt32(porta);
    MailAddressCollection comCopia;     

    Attachment att = new Attachment(memoryStream, "Boleto.pdf", MediaTypeNames.Application.Pdf);
    mensagem.Attachments.Add(att);      

    mensagem.Subject = "Payment Invoice";
    mensagem.Body = String.Format("Your payment invoice is available.");
    mensagem.IsBodyHtml = true;

    smtp.UseDefaultCredentials = true;
    smtp.EnableSsl = false;     

    smtp.Send(mensagem);

问题是附加到电子邮件的 PDF 无法正确呈现 HTML，因此它仍然是未格式化的。否则，当我创建一个空白文件并放入整个 HTML 并使用 Chrome 打开它时，它的格式非常好。

我需要将此 PDF 正确地附加到电子邮件中。

有人可以帮我吗？Here You can see the Rendering Problem

【问题讨论】：

标签： html css asp.net pdf render

【解决方案1】：

我终于找到了解决问题的方法！

有必要使用 itextSharp.xmlWorker 库并在代码隐藏中进行一些更改。原因是 HTMLWorker 确实无法解析 CSS，所以我不得不改用 XMLWorker 并执行以下操作：

    //Geração de PDF
    StringBuilder sb = new StringBuilder();      
    StringReader sr;
    Document pdfDoc;
    PdfWriter writer;
    byte[] bytes;

    sb.Append(boletoBancario.MontaHtml());
    sr = new StringReader(sb.ToString().Replace("<br />","<b></b>").Replace("<br>","<br></br>"));

    pdfDoc = new Document(PageSize.A4, 30, 30, 30, 30);

    writer = PdfWriter.GetInstance(pdfDoc, memoryStream);
    HtmlPipelineContext htmlContext = new HtmlPipelineContext(null);
    htmlContext.SetTagFactory(Tags.GetHtmlTagProcessorFactory());

    ICSSResolver cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(false);

    IPipeline pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext, new PdfWriterPipeline(pdfDoc, writer)));

    XMLWorker worker = new XMLWorker(pipeline, true);
    XMLParser xmlParser = new XMLParser(worker);

    pdfDoc.Open();

    xmlParser.Parse(sr);

    pdfDoc.Close();

    bytes = memoryStream.ToArray();
    memoryStream.Close();

    return new MemoryStream(bytes);

谢谢大家！

【讨论】：