c# - Generate PDF based on HTML code (iTextSharp, PDFSharp?)

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c# - Generate PDF based on HTML code (iTextSharp, PDFSharp?)

posted Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

c# - Generate PDF based on HTML code (iTextSharp, PDFSharp?)

Does the library PDFSharp can - like iTextSharp - generate PDF files *take into account HTML formatting *? (bold (strong), spacing (br), etc.)

Previously I used iTextSharp and roughly handled in such a way (code below):

 string encodingMetaTag = "<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />";
 string htmlCode = "text <div> <b> bold </ b> or <u> underlined </ u> <div/>";

 var sr = new StringReader (encodingMetaTag + htmlCode);
 var pdfDoc = new Document (PageSize.A4, 10f, 10f, 10f, 0f);
 var = new HTMLWorker htmlparser (pdfDoc);
 PdfWriter.GetInstance (pdfDoc, HttpContext.Current.Response.OutputStream);
 pdfDoc.Open ();
 htmlparser.Parse (sr);
 pdfDoc.Close ();

incorporated into the appropriate HTML form to a PDF document dealt with the class object HTMLWorker.. so what with PDFSharp? Has PDFSharp similar solution?

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1 Reply

深蓝 · Answer 1 · 2021-10-23T17:46:34+0000

I know this question is old, but here's a clean way to do it...

You can use HtmlRenderer combined with PDFSharp to accomplish this:

Bitmap bitmap = new Bitmap(1200, 1800);
Graphics g = Graphics.FromImage(bitmap);
HtmlRenderer.HtmlContainer c = new HtmlRenderer.HtmlContainer();
c.SetHtml("<html><body style='font-size:20px'>Whatever</body></html>");
c.PerformPaint(g);
PdfDocument doc = new PdfDocument();
PdfPage page = new PdfPage();
XImage img = XImage.FromGdiPlusImage(bitmap);
doc.Pages.Add(page);
XGraphics xgr = XGraphics.FromPdfPage(doc.Pages[0]);
xgr.DrawImage(img, 0, 0);
doc.Save(@"C:est.pdf");
doc.Close();

Some people report that the final image looks a bit blurry, apparently due to automatic anti-aliasing. Here's a post message on how to fix that: http://forum.pdfsharp.com/viewtopic.php?f=2&t=1811&start=0

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c# - Generate PDF based on HTML code (iTextSharp, PDFSharp?)

c# - Generate PDF based on HTML code (iTextSharp, PDFSharp?)

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