Delphi DLL

Zip Files in a Date Range

See more Zip Examples

Demonstrates how to use the Zip.MinDate and Zip.MaxDate properties to zip only those files with a last-modified date within a date range.

Note: This example requires Chilkat v10.0.0 or greater.

Delphi 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
success: Boolean;
zip: HCkZip;
zipPath: PWideChar;
recurse: Boolean;

begin
success := False;

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

zip := CkZip_Create();

zipPath := 'c:/temp/qa_output/out.zip';

// Initialize the zip object with the path of the .zip to be created.
CkZip_NewZip(zip,zipPath);

// The MinDate and MaxDate properties use the timestamp date/time string format.
// Here are some examples:
// YYYY-MM-DD (e.g., 2024-07-31)
// YYYY-MM-DDTHH:MM:SS�HH:MM (e.g., 2024-07-31T12:34:56+02:00)
// 2024-07-31T12:34:56Z (the "Z" denotes Zulu time, or UTC)

// Only append files having a last-modified date greater than 1-Jan-2017
CkZip_putMinDate(zip,'2017-01-01T00:00:00Z');

// Also, only append files having a last-modified date less than the end of 2020
CkZip_putMaxDate(zip,'2020-12-31T23:59:59Z');

// You don't need to specify both MinDate and MaxDate.
// You can specify only one or the other if needed.

// The MinDate/MaxDate properties apply to all of the Chilkat methods for appending files.

// Recursively append to the zip object the paths of the files and directories in a directory tree.
// At this point we are not creating the .zip, nor are we reading the contents of the files.
// We are simply appending references to the files and directories in the local filesystem
// that will get processed when WriteZip is called.
recurse := True;
success := CkZip_AppendFiles(zip,'c:/temp/files_to_zip',recurse);
if (success = False) then
  begin
    Memo1.Lines.Add(CkZip__lastErrorText(zip));
    Exit;
  end;

CkZip_putFileName(zip,zipPath);
success := CkZip_WriteZip(zip);
if (success = False) then
  begin
    Memo1.Lines.Add(CkZip__lastErrorText(zip));
    Exit;
  end;

CkZip_CloseZip(zip);

Memo1.Lines.Add('Success');

CkZip_Dispose(zip);

end;