how to convert html page to pdf with css using itextsharp?

问题

This is my code :

Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=TestPage.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);

StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);

this.Page.RenderControl(hw);

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

Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);

HTMLWorker htmlparser = new HTMLWorker(pdfDoc);

PdfWriter.GetInstance(pdfDoc, Response.OutputStream);

pdfDoc.Open();

**htmlparser.Parse(sr);** //the exception here

pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();

the error is :

Unable to cast object of type 'iTextSharp.text.html.simpleparser.CellWrapper' to type 'iTextSharp.text.Paragraph'.

What is this exception ?

回答1:

I don't know if this is the answer, but I found that iTextSharp is picky about having valid html. My tests had a table that was opened twice and never closed and that took about an hour for me to notice. The exception was very similar to the one you have there.

回答2:

use can you A4 size width & height for html deigning .

回答3:

use this set od code to create pdf from html.

String htmlText = "<div>Your HTML text here</div>";

Document document = new Document();

PdfWriter.GetInstance(document, new FileStream(Request.PhysicalApplicationPath + "\\outfile.pdf", FileMode.Create));
document.Open();
iTextSharp.text.html.simpleparser.StyleSheet styles = new iTextSharp.text.html.simpleparser.StyleSheet();
iTextSharp.text.html.simpleparser.HTMLWorker hw = new iTextSharp.text.html.simpleparser.HTMLWorker(document);
hw.Parse(new StringReader(htmlText));
document.Close();

Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "inline;filename=outfile.pdf");
Response.ContentType = "application/pdf";
Response.WriteFile(Request.PhysicalApplicationPath + "\\outfile.pdf");
Response.Flush();
Response.Clear();

来源：https://stackoverflow.com/questions/18486093/how-to-convert-html-page-to-pdf-with-css-using-itextsharp