(Delphi ActiveX) Transition from Zip.AppendString to Zip.AddString

Provides instructions for replacing deprecated AppendString method calls with AddString.

Note: This example requires Chilkat v11.0.0 or greater.

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
zip: TChilkatZip;
pathInZip: WideString;
textData: WideString;
entryObj: IChilkatZipEntry;
success: Integer;
ze: TChilkatZipEntry;
index: Integer;

begin
zip := TChilkatZip.Create(Self);

// ...
// ...
pathInZip := 'example.txt';
textData := 'This is a test';

// ------------------------------------------------------------------------
// The AppendString method is deprecated:

entryObj := zip.AppendString(pathInZip,textData);
if (zip.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

// ...
// ...

// ------------------------------------------------------------------------
// Do the equivalent using AddString.

// Instead of returning the zip entry object, we just return success/failure.
success := zip.AddString(pathInZip,textData,'utf-8');
if (success = 0) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

// Do the following if you need the zip entry object for what was just appended.
// The newly appended entry is the last one.
ze := TChilkatZipEntry.Create(Self);
index := zip.NumEntries - 1;
zip.EntryAt(index,ze.ControlInterface);
end;