Dart

Remove a Single Attachment from an Email

Demonstrates the Chilkat Email.DropSingleAttachment method, which removes the attachment at the specified zero-based index. Valid indexes run from 0 through NumAttachments - 1. This example adds two attachments, removes the first, and prints the count before and after.

Background: Attachments are addressed by a zero-based index, so the first is 0, the second 1, and so on. DropSingleAttachment removes just one — use it to prune a specific file (say, an oversized or unwanted attachment) while keeping the rest. Note that after a removal the remaining attachments shift down, so if you are deleting several by index, iterate from the highest index downward to avoid skipping any.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the DropSingleAttachment method, which removes the attachment at the
  // specified zero-based index.

  final email = CkEmail();
  email.subject = 'Drop a single attachment';

  email.addStringAttachment('a.txt', 'first attachment');
  email.addStringAttachment('b.txt', 'second attachment');
  print('NumAttachments before = ${email.numAttachments}');

  // Remove the attachment at index 0 (the first attachment).
  email.dropSingleAttachment(0);

  print('NumAttachments after = ${email.numAttachments}');
}