Tips for locating the most recent node within a group of nodes based on the element's date and time attribute in an XML document

<data>

  <manufacture_date="2013-06-05 T 19:40:50. 88463 7 Z">
    <java_package>
      <author>tom</author>
      <year>2013</year>
      <price>29.99</price>
    </java_package>
  </manufacture>

  <manufacture_date="2015-06-05T19:40:50.884637Z">
    <java_package_2>
      <author>tom</author>
      <year>2015</year>
      <price>39.95</price>
    </java_package_2>
  </manufacture>

 <manufacture_date="2014-06-05T19:40:50.884637Z">
    <java_package_3>
      <author>tom</author>
      <year>2003</year>
      <price>39.95</price>
    </java_package_3>
  </manufacture>

</data>

Root element is DATA, with Manufacture as the element content. In this XML data, we're trying to fetch the most recent manufacture based on date.

The latest manufacture has a date of "2015-06-05 T 19 : 40 : 50 . 88463 7 Z"

This date is an attribute of the manufacture element.

Currently working in ASP.NET and C# for this task.

Below is the code I've attempted:

 XmlDocument xdoc = new XmlDocument();
                xdoc.LoadXml("bc.xml");
                XmlNode root = xdoc.DocumentElement;
              XmlNodeList nodeList = root.SelectNodes("//manufacture");

            foreach (XmlNode node1 in nodeList)
                {

                    Label1.Text +=  node.Attributes["DATE"].Value.ToString() + "\n <br>";

                }

Answer №1

Your date and time formatting within the document is inconsistent and incorrect. It needs to follow this format: "2013-06-05 T19:40:50.884637Z" in order for all code to work without errors.

Here is a solution:

var mf = doc.Root.Elements("manufacture")
        .OrderByDescending (m => DateTime.ParseExact(m.Attribute("date").Value, "yyyy-MM-dd THH:mm:ss.ffffffZ", null))
        .First();

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