Question

I have this code. Also here is a sample of the XML. I apologize for any confusion

<object type="node" >
    <property name="id" value="1" />
    <property name="name" value="ossvc06_node1" />
      <property name="port_id" value="50050768014062AC" />
      <property name="port_status" value="active" />
      <property name="port_speed" value="4Gb" />
  <property name="port_id" value="50050768013062AC" />
  <property name="port_status" value="active" />
  <property name="port_speed" value="4Gb" />
  <property name="port_id" value="50050768011062AC" />
 <property name="port_status" value="active" />
 <property name="port_speed" value="4Gb" />
 <property name="port_id" value="50050768012062AC" />
 <property name="port_status" value="active" />
 <property name="port_speed" value="4Gb" />
 <property name="hardware" value="8G4" />
 <property name="iscsi_name" value="iqn.1986-03.com.ibm:2145.ossvc06.ossvc06node1" />
 <property name="iscsi_alias" value="" />
 <property name="failover_active" value="no" />
 <property name="failover_name" value="ossvc06_node2" />
 <property name="failover_iscsi_name" value="iqn.1986-       .com.ibm:2145.ossvc06.ossvc06node2" />
 <property name="failover_iscsi_alias" value="" />
 <property name="front_panel_id" value="115286" />
</object>

In the input file there are two of these objects of type “Node” each with different values for the property tags.

In this code I am looking for all the objects of type “node” in the incoming XML. There are 2 of them. The ‘var nodes’ statement evaluates correctly. In the debugger I can see two XElements with what appears to be the proper type and elements in the element list. However, the statement that gets the elements and assigns them to a list has ChildElements from both of the objects of type “node” that are in the XML and I am not sure why.

//load the input file
 XDocument xdoc = XDocument.Load(_InputFile);

//get the object of type 'node'

//this code gives the results expected
// in the debugger each XElement appears to have the proper value and childElements
var nodes = from node in xdoc.Descendants("object")
                        where node.Attribute("type").Value == "node"
                        select node;

foreach (XElement nodelement  in nodes)
{  

    // problem happens here, the child elements from both  nodes get assigned to the list 
    List<XElement> nodeles = nodelement.Elements().ToList();
    Node node = NodeFactory(nodelement);

    // now assign the node to the correct IO group
    var iogrp = SVCClusters[0].IOGroups.Where(io => io.Name == node.IOGroupName);
    if (iogrp.FirstOrDefault().FirstNode == null) { iogrp.FirstOrDefault().FirstNode = node; }
    else { iogrp.FirstOrDefault().SecondNode = node; }

}

Answer 1

Can you run this in a console app and tell me what you get

    static void Main(string[] args)
    {
        XDocument xdoc = XDocument.Parse("<root><object type=\"node\" ><property name=\"id\" value=\"1\" /><property name=\"name\" value=\"ossvc06_node1\" /></object><object type=\"node\" ><property name=\"id\" value=\"2\" /><property name=\"name\" value=\"ossvc06_node2\" /></object></root>");

        var nodes = xdoc.Descendants("object").Where(node => node.Attribute("type").Value == "node").ToList();

        foreach (XElement nodelement in nodes)
        {
            List<XElement> nodeles = nodelement.Elements().ToList();

            foreach (var node in nodeles)
                Console.WriteLine(node);
        }
    }

You should have 4 rows output to the console

Edit—

Original issue was that an XPath expression “//property[@name=’port_id’]” was being used. This queries from the document root, not from the current node.

Change the XPath to be either “property[@name=’port_id’] or “.//property[@name=’port_id’]”