Dart

Get the Content-Type of an Attachment

Demonstrates the Chilkat Email.GetAttachmentContentType method, which returns the Content-Type header field for the Nth attachment. Attachment indexing begins at 0. This example adds an attachment and reads its content type.

Background: The Content-Type (MIME type) of an attachment — such as text/plain, application/pdf, or image/png — tells a mail client how to handle the part: whether to display it inline, offer it as a download, or pick an icon for it. Reading it lets your program filter or route attachments by type, for example extracting only the PDFs from a batch of messages.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the GetAttachmentContentType method, which returns the Content-Type header
  // field for the Nth attachment.  The index is zero-based.

  final email = CkEmail();
  email.subject = 'Attachment content type';

  email.addStringAttachment('notes.txt', 'Some notes.');

  // Get the Content-Type of the first attachment (index 0).
  final ct = email.getAttachmentContentType(0);
  print('Attachment 0 Content-Type: $ct');
}