(Delphi DLL) Controlling Paths of Files Added to Zip

When appending files to a .zip, it can be difficult to get the paths exactly as you want them. This example describes a way that you can control the path information when adding a single file at a time to 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, Zip;

...

procedure TForm1.Button1Click(Sender: TObject);
var
zip: HCkZip;
success: Boolean;
saveExtraPath: Boolean;

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

zip := CkZip_Create();

// Intialize the zip object by calling NewZip.
success := CkZip_NewZip(zip,'myZip.zip');

// Add a reference to a file on disk to the zip object.
// (When appending files to a zip, the files are not actually
// read into memory.  References to the file(s) are added.
// When WriteZip is called, the referenced files are streamed in
// and compressed to the .zip.)
saveExtraPath := False;
success := CkZip_AppendOneFileOrDir(zip,'/temp/a/hamlet.xml',saveExtraPath);
// For brevity, this example will not check the return status...

// The saveExtraPath argument, if set, will cause the path information
// passed in the 1st argument to be saved in the .zip.

// To add "a/hamlet.xml", do this:
CkZip_putAppendFromDir(zip,'/temp');
//  The saveExtraPath argument, if set, will cause the path information
//  passed in the 1st argument to be saved in the .zip.     But the path in AppendFromDir is
//  not added to that path saved in the .zip.     If there is a path in AppendFromDir then the
//  path in the 1st argument must be relative, not preceded by a drive or \.
saveExtraPath := True;
success := CkZip_AppendOneFileOrDir(zip,'a/hamlet.xml',saveExtraPath);

// To add "temp/a/hamlet.xml", do this:
CkZip_putAppendFromDir(zip,'/');
saveExtraPath := True;
success := CkZip_AppendOneFileOrDir(zip,'temp/a/hamlet.xml',saveExtraPath);

// The zip written here will contain hamlet.xml three times,
// each with a different relative path.
success := CkZip_WriteZipAndClose(zip);

CkZip_Dispose(zip);

end;