Dart

Get the Nth Text Part of a Given Content-Type

Demonstrates the Chilkat Email.GetNthTextPartOfType method, which returns the text content of the Nth non-multipart MIME part matching a Content-Type pattern. The arguments are a zero-based index among the matching parts, the content-type pattern, an inlineOnly flag, and an excludeAttachments flag. This example retrieves the first text/html part.

Background: A MIME message is a tree of parts, and sometimes you want a specific one by its type rather than by walking alternatives or bodies. The content-type pattern can be exact (text/html) or a wildcard (text/*), and the two boolean flags narrow the search — inlineOnly restricts to inline (displayed) parts, and excludeAttachments skips parts marked as attachments — so you can target exactly the text you care about.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the GetNthTextPartOfType method, which returns the text content of the Nth
  // non-multipart MIME part matching a Content-Type pattern.  The first argument is the zero-based
  // index among matching parts, the second is the Content-Type pattern, the third is inlineOnly, and the fourth is
  // excludeAttachments.

  final email = CkEmail();
  email.subject = 'GetNthTextPartOfType example';

  email.setTextBody('This is the plain-text version.', 'text/plain');
  email.addHtmlAlternativeBody('<html><body>This is the HTML version.</body></html>');

  // Get the first (index 0) part whose content type matches text/html.
  final htmlPart = email.getNthTextPartOfType(0, 'text/html', false, false);
  print('First text/html part:');
  print(htmlPart);
}