(Delphi ActiveX) PDF File Encoding to Base64

Demonstrates how to encode a PDF file to base64, and then decode.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
pdfData: TChilkatBinData;
success: Integer;
b64: WideString;
pdfData2: TChilkatBinData;

begin
pdfData := TChilkatBinData.Create(Self);

success := pdfData.LoadFile('qa_data/helloWorld.pdf');
if (success <> 1) then
  begin
    Memo1.Lines.Add('failed to load PDF file.');
    Exit;
  end;

// Encode the PDF to base64
// Note: to produce base64 on multiple lines (as it would appear in the MIME of an email),
// pass the string "base64_mime" instead of "base64".
b64 := pdfData.GetEncoded('base64');
Memo1.Lines.Add(b64);

// Decode from base64 PDF.
pdfData2 := TChilkatBinData.Create(Self);
pdfData2.AppendEncoded(b64,'base64');
success := pdfData2.WriteFile('qa_output/helloWorld2.pdf');
if (success <> 1) then
  begin
    Memo1.Lines.Add('failed to write PDF file.');
    Exit;
  end;
end;