(Delphi DLL) Remove a File from a .zip

Demonstrates how to remove a file from a .zip.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
zip: HCkZip;
success: Boolean;
entry: HCkZipEntry;
zip2: HCkZip;

begin
// This requires the Chilkat Zip API to have been previously unlocked.
// See Unlock Chilkat Zip for sample code.

// First prepare a .zip and write it..
zip := CkZip_Create();

CkZip_NewZip(zip,'qa_output/abc.zip');

// Add some files..
entry := CkZip_AppendString(zip,'a.txt','aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa');
CkZipEntry_Dispose(entry);
entry := CkZip_AppendString(zip,'b.txt','bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb');
CkZipEntry_Dispose(entry);
entry := CkZip_AppendString(zip,'c.txt','cccccccccccccccccccccccccccccccccccc');
CkZipEntry_Dispose(entry);

// Write to qa_output/abc.zip
// This .zip contains three files: a.txt, b.txt, and c.txt
success := CkZip_WriteZipAndClose(zip);

// -------------------------------------------------------------------
// Open abc.zip, remove an entry, and re-write.
zip2 := CkZip_Create();
CkZip_OpenZip(zip2,'qa_output/abc.zip');

entry := CkZip_GetEntryByName(zip2,'b.txt');
CkZip_DeleteEntry(zip2,entry);
CkZipEntry_Dispose(entry);
// Write the modified .zip back to "abc.zip"
success := CkZip_WriteZip(zip2);

// To write to a different filename, change the FileName..
CkZip_putFileName(zip2,'qa_output/ac.zip');
success := CkZip_WriteZipAndClose(zip2);

Memo1.Lines.Add('success.');

CkZip_Dispose(zip);
CkZip_Dispose(zip2);

end;