Parse out a node from an XML in AX 2012

Parsing out nodes from an XML is fairly easy in AX if you know what you're doing. I'm going to show how I do a basic XML parse.

For this example, the AX system can receive an XML that can either be for a quotation or sales order. There are multiple items in this request. We will need to cycle through the lines, do a process of some type (I will not share this as it wouldn't help anyone out), and finally, send that same XML back to the previous system indicating that a node changed. This node changed can be processed, an adjusted quantity, or whatever you really want.

I have a sample XML as well as the code which will:

1. grab a node in the XML root and get the value
2. cycle through the items sent in the XML
3. grab a quantity from the attributes in the item nodes
4. change a value in the item nodes

Hope this helps.

public static server XML daxXMLTest(str _custOrderXmlStr)
{ 
   XmlDocument custOrderXml;
   XmlElement  xmlRoot;
   XmlElement  xmlRecord;
   str         orderType;
   XmlNode     xmlNode;
   XmlNodeList xmlRecordList;
   RecId       lineRecId;
   int         i;

   custOrderXml = new XmlDocument();
   custOrderXml.loadXml(_custOrderXmlStr);
   xmlRoot = custOrderXml.documentElement().getNamedElement('Items');
   xmlRecordList = xmlRoot.childNodes();

   // Grab a value 
   xmlNode = custOrderXml.documentElement().selectSingleNode('OrderType');
   orderType = xmlNode.text();

   if(xmlRecordList)
   {
      // Cycle through the items in the incoming XML
      for (i = 0; i < xmlRecordList.length(); i++)
      {
         // Grab the item in the XML that corresponds to the iteration number
         xmlRecord = xmlRecordList.item(i);

         // Parse out local variables
         lineRecId = str2int64(xmlRecord.getAttribute('RecId'));
         ...

         // Do the magic
         ...

         // Change value in the XML that was sent to AX so we can return it with new values
         // I'm setting the example 'newValue' to true just out of simplicity
         newValue = true;
         xmlRecord.setAttribute('NodeToChange', newValue);
      }
   }
}

return custOrderXml.toString();