Delphi ActiveX Requires Chilkat v11.7.0+

Replace PDF Text on Selected Pages Only

See more PDF Text Replacement Examples

Demonstrates the "pages" option, which limits the search for placeholders and labels to the given pages: "all" (the default), "first", "last", "odd", "even", or a list such as "1,3,5-9". The two-page order confirmation carries the same "Status:" label on both pages; the status is changed on page 2 only, then on both pages. 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 PDF used in this example is available at order_confirmation.pdf

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

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

//  Both pages have "Status:   Pending".  With pages "2", only page 2 is searched.
json.UpdateString('pages','2');
json.UpdateString('labels[0].label','Status:');
json.UpdateString('labels[0].value','Shipped');
success := pdf.TextReplace('check',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('pages 2: found on page(s) ' + jsonOut.StringOf('replacements[0].pages'));

//  With every page searched, the default occurrence ("first") still replaces one -- the first in reading order.
json.UpdateString('pages','all');
success := pdf.TextReplace('check',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('pages all, first occurrence: found on page(s) ' + jsonOut.StringOf('replacements[0].pages'));

//  Every occurrence on every page.
json.UpdateString('labels[0].occurrence','all');
success := pdf.TextReplace('apply',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('pages all, every occurrence: ' + IntToStr(jsonOut.IntOf('replacements[0].count')) + ' replaced on page(s) ' + jsonOut.StringOf('replacements[0].pages'));

success := pdf.WriteFile('qa_output/order_shipped.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

//  Sample output:

//  pages 2: found on page(s) 2
//  pages all, first occurrence: found on page(s) 1
//  pages all, every occurrence: 2 replaced on page(s) 1,2