Delphi ActiveX Requires Chilkat v11.7.0+

Exclude or Include Running Headers and Page Numbers

See more PDF Text Extraction Examples

Demonstrates the "repeatedHeadersFooters" filter. Text repeated at the same position on most pages, such as a running header and "Page N of 4" footers, is left out by default; set the filter to "include" to keep it. Delphi ActiveX

var
success: Integer;
pdf: TChilkatPdf;
json: TChilkatJsonObject;
jsonOut: TChilkatJsonObject;

begin
success := 0;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The four-page PDF used in this example is available at running_header.pdf

pdf := TChilkatPdf.Create(Self);
success := pdf.LoadFile('qa_data/pdf/running_header.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
jsonOut := TChilkatJsonObject.Create(Self);

//  Every page has the header "Harbor Lighthouse Society - Annual Report 2026" at the top right
//  and "Page N of 4" at the bottom.  By default both are excluded, so the text of page 2 is just
//  its heading and paragraphs.
json.UpdateString('pages','2');
success := pdf.ExtractText('text',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('---- default (repeated headers and footers excluded) ----');
Memo1.Lines.Add(jsonOut.StringOf('text'));

//  Include them.  The detection looks at the neighbouring pages even when only one page is
//  selected, so a single page extracted on its own still loses its running head by default.
json.UpdateString('repeatedHeadersFooters','include');
success := pdf.ExtractText('text',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('---- repeatedHeadersFooters: include ----');
Memo1.Lines.Add(jsonOut.StringOf('text'));

//  Sample output:

//  ---- default (repeated headers and footers excluded) ----
//  The Work
//  
//  The restoration society took ownership in 2021 with three goals: make the structure watertight, return the tower to public access, and relight the lantern with a historically accurate lens. The first two were met in the second season, and the lens arrived on loan in November.
//  
//  The spiral stair is original and is the most fragile part of the building. Twelve of the ninety-one treads were cracked or missing, and the central column had corroded badly at the second landing. The treads were cast from patterns taken off an intact tread.
//  ---- repeatedHeadersFooters: include ----
//  Harbor Lighthouse Society - Annual Report 2026
//  
//  The Work
//  
//  The restoration society took ownership in 2021 with three goals: ...
//  
//  The spiral stair is original and is the most fragile part of the building. ...
//  
//  Page 2 of 4