Dart

Save a Related Item to Disk

Demonstrates the Chilkat Email.SaveRelatedItem method, which saves the related item 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 a related style sheet and saves it.

Background: Related items are the inline resources (images, style sheets) an HTML email carries in its multipart/related enclosure. SaveRelatedItem writes one of them out as a file — a building block for tasks like extracting a specific embedded image, or manually unpacking a message when you want finer control than the all-in-one UnpackHtml / AspUnpack methods provide.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the SaveRelatedItem method, which saves the related item 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 a related item';

  // Set an HTML body that references a related style sheet by name.
  email.setHtmlBody('<html><head><link rel="stylesheet" href="styles.css"/></head><body>Styled.</body></html>');
  email.addRelatedString2('styles.css', 'body { color: navy; }', 'utf-8');

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

  print('Saved related item 0.');

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