Dart

Find Direct Child with Specific Tag

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Demonstrates how to find a direct child having a specific tag.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final xml = CkXml();

  // The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
  try {
    xml.loadXmlFile('qa_data/xml/fruit.xml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Find the direct child node having the tag "meat", and 
  // return a new instance of the XML object referencing the
  // child node, if found.
  try {
    final child = xml.findChild('meat');
    print('Content = ${child.content}');
  } on ChilkatException {
    print('No direct child having the tag "meat" was found.');
  }

  // The same can be accomplished without creating a new 
  // XML object instance.  Instead, the FindChild2 method updates
  // the caller's internal reference to the found child, if successful.
  try {
    xml.findChild2('meat');
    // Success!  The xml object now references the found child.
    print('Content = ${xml.content}');
    // Restore the reference back to the parent.
    xml.getParent2();
  } on ChilkatException {
    print('No direct child having the tag "meat" was found.');
  }
}