Dart

Save a Single Email Attachment to Disk

Demonstrates the Chilkat Email.SaveAttachedFile method, which saves the attachment at a given zero-based index to a directory. If the directory or any of its components do not exist, Chilkat creates them. This example adds an attachment and saves it.

Background: Where SaveAllAttachments writes every attachment at once, SaveAttachedFile saves just one by index — useful when you have inspected the attachments (by type, name, or size) and want to extract only a specific file. The attachment keeps its own filename; the same filename-safety considerations apply as when saving all of them.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the SaveAttachedFile method, which saves the attachment at a given
  // zero-based index to a directory.  If the directory (or any of its components) does not
  // exist, Chilkat creates it.

  final email = CkEmail();
  email.subject = 'Save one attachment';

  email.addStringAttachment('report.txt', 'Attachment content.');

  // Save the attachment at index 0 into the specified directory.
  try {
    email.saveAttachedFile(0, 'qa_output/attachments');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Saved attachment 0.');

  // Note: The path "qa_output/..." is a relative local filesystem path,
  // relative to the current working directory of the running application.
}