how can i add a font family in in pdf itextsharp c# -


here code:

stringbuilder sb = new stringbuilder();      sb.append("<table border='1'  style='border-           collapse:collapse;width:100%;margin-top:10px;font-family: 'source sans         pro','helvetica neue',helvetica,arial,sans-serif !important;font-size:         14px !important;font-weight: 300;'>");             sb.append("<tr>");             sb.append("<td align='center' style='padding:5px;'>");             sb.append("question");             sb.append("</td>");             sb.append("<td align='center' style='padding:5px;'>");             sb.append("<h4>answer</h4>");             sb.append("</td>");             sb.append("</tr>");              sb.append("<tr>");             sb.append("<td style='padding:5px;'>");             sb.append("gender");             sb.append("</td>");             sb.append("<td style='padding:5px;'>");             sb.append(result.rows[0]["question1"].tostring());             sb.append("</td>");             sb.append("</tr>");              sb.append("<tr>");             sb.append("<td style='padding:5px;'>");             sb.append("age group");             sb.append("</td>");             sb.append("<td style='padding:5px;'>");             sb.append(result.rows[0]["question2"].tostring());             sb.append("</td>");             sb.append("</tr>");          stringreader sr = new stringreader(sb.tostring());         document pdfdoc = new document(pagesize.a4, 10f, 10f, 10f, 0f);         htmlworker htmlparser = new htmlworker(pdfdoc);          using (memorystream memorystream = new memorystream())         {             pdfwriter writer = pdfwriter.getinstance(pdfdoc, memorystream);              pdfdoc.open();              htmlparser.parse(sr);             pdfdoc.close();              byte[] bytes = memorystream.toarray();             memorystream.close();             response.clear();             response.contenttype = "application/pdf";                                  response.addheader("content-disposition", "; filename=survey.pdf");              response.buffer = true;             response.charset = "";             response.cache.setcacheability(httpcacheability.nocache);             response.binarywrite(bytes);              response.flush();             response.end();             response.close();          }

here how can add font family :'source sans pro','helvetica neue',helvetica,arial,sans-serif !important , font-weight: 400; text in pdf.

how add font family , font style in pdf itextsharp.

i using code not working. style in sb.append in table not working in pdf page in .net c#. trying below code not working:

//font fon = fontfactory.getfont("source sans pro", 14);                 //font fon1 = fontfactory.getfont("helvetica neue", 14);                 //font fon2 = fontfactory.getfont("helvetica", 14);                 //font fon3 = fontfactory.getfont("arial", 14);                 //font fon4 = fontfactory.getfont("sans-serif", 14);

any suggestions??


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