Delphi ActiveX

Transition from Zip.AppendString to Zip.AddString

Provides instructions for replacing deprecated AppendString method calls with AddString. Delphi ActiveX

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

begin
success := 0;

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;