Dart

Set the Charset of an Attachment

Demonstrates the Chilkat Email.SetAttachmentCharset method, which sets the charset parameter of the Content-Type header field for the attachment at a given zero-based index. This example adds a text attachment and sets its charset to utf-8.

Background: For a text attachment, the charset parameter tells the receiving client which character encoding the bytes use, so accented or non-Latin text renders correctly. Setting it explicitly (typically utf-8) removes ambiguity when the attachment contains non-ASCII content — without it, a client may guess wrong and display garbled characters.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the SetAttachmentCharset method, which sets the charset parameter of the
  // Content-Type header field for the attachment at the given zero-based index.

  final email = CkEmail();
  email.subject = 'Set attachment charset';

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

  // Set the charset of the first attachment (index 0) to utf-8.
  try {
    email.setAttachmentCharset(0, 'utf-8');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The attachment's Content-Type now includes charset="utf-8".
  print(email.getMime());
}