c# - Unable to search a text in generated PDF from word -

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we generating pdf word document, using "microsoft.office.interop.word.application" our code. problem when open generated pdf , search text , saying not found though text there. thinking content inside pdf coming image instead of text, other things displaying tables, images coming good. there way make pdf searchable?

i attaching code here. please let me know thoughts. appreciated.

thanks sri

code:

using system; using system.collections.generic; using system.collections; using system.diagnostics; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using word = microsoft.office.interop.word; using system.io; using microsoft.office.interop.word; namespace doctopdfconverter {      public class doctopdfconverter     {          static int main(string[] args)         {             string inputfilename = args[0];             string outputfilename = args[1];             console.writeline("started converting word document pdf >> .....");             doctopdfconverter dc = new doctopdfconverter();             microsoft.office.interop.word.application application = new microsoft.office.interop.word.application();             dc.converttopdf(inputfilename, outputfilename, application);             console.writeline("successfully done pdf conversion.");             return 0;         }          public void converttopdf(string inputfilename, string outputfilename, microsoft.office.interop.word.application application)         {             object originalformat = null;             object routedocument = false;             object saveoption = null;             word.bookmarks bookmarks = null;             string bookmarknames = string.empty;             string outname = string.empty;             try             {                 object missing = system.reflection.missing.value;                 object readonly = false;                 object isvisible = true;                 object inputsfilename = inputfilename;                 application.visible = true;                 application.defaultweboptions().alwayssaveindefaultencoding = true;                 word.document adoc = application.documents.open(ref inputsfilename, ref missing,                 ref readonly, ref missing, ref missing,                 ref missing, ref missing, ref missing,                 ref missing, ref missing, ref missing,                 ref missing, ref missing, ref missing, ref isvisible);                 saveoption = word.wdsaveoptions.wddonotsavechanges;                 originalformat = word.wdoriginalformat.wdoriginaldocumentformat;                 object fileformat = wdsaveformat.wdformatpdf;                 object outputfilenames = outputfilename;                   if (adoc != null)                 {                     console.writeline("before export.......");                 adoc.exportasfixedformat(  outputfilename, wdexportformat.wdexportformatpdf, false,                                                  wdexportoptimizefor.wdexportoptimizeforprint,                                                  wdexportrange.wdexportalldocument, 0, 0,                                                  wdexportitem.wdexportdocumentcontent, true, true,                                                  wdexportcreatebookmarks.wdexportcreateheadingbookmarks, true, true, false,                                                  ref missing);                 console.writeline("after export..............");                 }              }             catch (exception e)             {                 console.writeline(e);             }                         {                 application.quit(ref saveoption, ref originalformat, ref routedocument);             }          }     } }


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