Dart

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.

Dart

import 'package:chilkat/chilkat.dart';

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

  final zip = CkZip();

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

  // Initialize the zip object with the path of the .zip to be created.
  zip.newZip(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
  zip.minDate = '2017-01-01T00:00:00Z';

  // Also, only append files having a last-modified date less than the end of 2020
  zip.maxDate = '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.
  final recurse = true;
  try {
    zip.appendFiles('c:/temp/files_to_zip', recurse);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  zip.fileName = zipPath;
  try {
    zip.writeZip();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  zip.closeZip();

  print('Success');
}