c# - Flattening PDF without /AcroForm fields with /Annot Widget -

i'm struggling flattening using itextsharp 5.5.10. code represent variety of efforts flatten pdf following code found on , google searches.

void process() {     pdfreader reader = new pdfreader(minfilename);     // 1 type of fields     acrofields formfields = reader.acrofields;     int countacrofields = formfields.fields.count;     // 2 type of fields     pracroform form = reader.acroform;     list<pracroform.fieldinformation> fieldlist = form.fields;     // 3 think same 2     pdfdictionary acroform = reader.catalog.getasdict(pdfname.acroform);     pdfarray acrofields = (pdfarray)pdfreader.getpdfobject(acroform.get(pdfname.fields), acroform);     // 4 type of fields     xfaform xfaform = formfields.xfa;     bool flatten = false;      if (countacrofields > 0)     {         //no fields found     }     else if (fieldlist.count > 0)     {         //no fields found     }     else if (xfaform.xfapresent == true)     {         //no xfaforms found         readxfa(reader);     }     else     {         // yes, there annotations , code extracts them not flatten them         pdfdictionary page = reader.getpagen(1);         pdfarray annotsarray = page.getasarray(pdfname.annots);         if ( annotsarray == null)             return;         else         {             list<string> namedfieldtoflatten = new list<string>();             foreach (var item in annotsarray)             {                 var annot = (pdfdictionary)pdfreader.getpdfobject(item);                  var type = pdfreader.getpdfobject(annot.get(pdfname.type)).tostring(); //expecting /annot                 var subtype = pdfreader.getpdfobject(annot.get(pdfname.subtype)).tostring(); //expecting /widget                 var fieldtype = pdfreader.getpdfobject(annot.get(pdfname.ft)).tostring(); //expecting /tx                  if (annot.get(pdfname.type).equals(pdfname.annot) &&                     annot.get(pdfname.subtype).equals(pdfname.widget))                 {                     if (annot.get(pdfname.ft).equals(pdfname.tx))                     {                         flatten = true;                         var textlabel = pdfreader.getpdfobject(annot.get(pdfname.t)).tostring(); //name of textbox field                         namedfieldtoflatten.add(textlabel);                         var fieldvalue = pdfreader.getpdfobject(annot.get(pdfname.v)).tostring(); //value of textbox                         console.writeline($"found label={textlabel} value={fieldvalue}");                     }                 }             }              if (flatten == true)             {                 // flatten pdf [11/9/2016 15:10:06]                 string foldername = path.getdirectoryname(minfilename);                 string basename = path.getfilenamewithoutextension(minfilename);                 string outname = $"{foldername}\\{basename}_flat.pdf";                 using (var fstream = new filestream(outname, filemode.create))                 {                     //this totally removes fields instead of flattening them                     var stamper = new pdfstamper(reader, fstream) { formflattening = true, freetextflattening = true, annotationflattening = true };                     var stamperform = stamper.acrofields;                     stamperform.generateappearances = true;                     foreach (var item in namedfieldtoflatten)                     {                         stamper.partialformflattening(item);                     }                     stamper.close();                     reader.close();                 }             }         }     } } 

any tips on how turn "fields" text flatten in acrobat?

this pdf i'm trying flatten.

this output of code.

the problem form broken. indeed has /annots, , annotations widget annotations have entries meant entries in field dictionary, there no form in pdf. or rather: there form, /fields array empty.

as /fields array empty, there no fields flatten. widget annotations removed , don't see anything. not itext bug: need fix form before filling out.

in java, you'd fix form this:

pdfreader reader = new pdfreader(src); pdfdictionary root = reader.getcatalog(); pdfdictionary form = root.getasdict(pdfname.acroform); pdfarray fields = form.getasarray(pdfname.fields);  pdfdictionary page; pdfarray annots; (int = 1; <= reader.getnumberofpages(); i++) {     page = reader.getpagen(i);     annots = page.getasarray(pdfname.annots);     (int j = 0; j < annots.size(); j++) {         fields.add(annots.getasindirectobject(j));     } } pdfstamper stamper = new pdfstamper(reader, new fileoutputstream(dest)); stamper.close(); reader.close(); 

it should easy port c#. i'm not c# developer, (untested) attempt @ making port:

pdfreader reader = new pdfreader(src); pdfdictionary root = reader.catalog; pdfdictionary form = root.getasdict(pdfname.acroform); pdfarray fields = form.getasarray(pdfname.fields); pdfdictionary page; pdfarray annots; (int = 1; <= reader.numberofpages; i++) {     page = reader.getpagen(i);     annots = page.getasarray(pdfname.annots);     (int j = 0; j < annots.size; j++) {         fields.add(annots.getasindirectobject(j));     } } pdfstamper stamper = new pdfstamper(reader, new filestream(dest, filemode.create)); stamper.close(); reader.close(); 

once you've fixed form this, you'll able flatten correctly.