(Delphi ActiveX) Convert any File to Base64 (and back)

Demonstrates how to get the contents of any file as a base64 string, and then write it back.

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
bd: TChilkatBinData;
success: Integer;
b64Str: WideString;
bd2: TChilkatBinData;

begin
bd := TChilkatBinData.Create(Self);

// This example will load a PDF and return it as a base64 string.
success := bd.LoadFile('qa_data/pdf/helloWorld.pdf');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load file.');
    Exit;
  end;

b64Str := bd.GetEncoded('base64');
Memo1.Lines.Add(b64Str);

// Now write the base64 string back to the binary PDF file:
bd2 := TChilkatBinData.Create(Self);
success := bd2.AppendEncoded(b64Str,'base64');
success := bd2.WriteFile('qa_output/helloWorld.pdf');
end;