Dart

Add a Related Item from BinData by Content-Location

Demonstrates the Chilkat Email.AddRelatedBd2 method, which adds a related item using the binary data in a BinData object, addressed by Content-Location. The second argument specifies the filename, path, or URL used by the corresponding HTML reference. This example embeds an image referenced as logo.png.

Background: This is the binary counterpart of AddRelatedString2 and the Content-Location sibling of AddRelatedBd. Instead of a generated cid: reference, the HTML keeps an ordinary src="logo.png" and the related part is matched to it by name — convenient when turning an existing web page into an email so its original relative URLs keep working.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the AddRelatedBd2 method, which adds a related item using the binary data in
  // a BinData object, addressed by Content-Location.  The second argument specifies the filename/path/URL
  // used by the corresponding HTML reference.

  final email = CkEmail();
  email.subject = 'Related image from BinData (Content-Location)';

  // The HTML references the image by the same name used as the Content-Location.
  email.setHtmlBody('<html><body><img src="logo.png"/></body></html>');

  // Load the image data from a file into a BinData object.
  final bdImage = CkBinData();
  try {
    bdImage.loadFile('qa_data/images/logo.png');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Add the image as a related item addressed by Content-Location "logo.png".
  try {
    email.addRelatedBd2(bdImage, 'logo.png');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('NumRelatedItems = ${email.numRelatedItems}');

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