XML - parsing problem, elements

Question

Hello,

I can only find the root element, not the second element.

Why? What is wrong?

<ROOT>
       <LANEA track="1" barcode="A_1235456"/>
</ROOT>

<ROOT>
       <LANEB track="2" barcode="B_1235456"/>
</ROOT>

<ROOT>
       <LANEC track="3" barcode="C_1235456"/>
</ROOT>

This works, but without ROOT

foreach (var name in result.Root.DescendantNodes().OfType<XElement>().Select(x => x.Name).Distinct())
{
	Trace.WriteLine(name);
}

I want only a list with all elements and the root element.

XDocument result = XMLRequestsResponses.XmlResponses.ID_SERO;
string txt = result.ToString();

IEnumerable<XElement> childElements = from el in result.Elements() select el;
foreach (XElement el in childElements)
{
	Trace.WriteLine("Name: " + el.Name);

	if (el.Name.LocalName == "LANEA")
	{
		Trace.WriteLine("aa Name: " + el.Name.LocalName);
		break;
	}
	
	else if (el.Name.LocalName == "LANEB")
	{
		Trace.WriteLine("bb Name: " + el.Name.LocalName);
		break;
	}
	
	else if (el.Name.LocalName == "LANEC")
	{
		Trace.WriteLine("cc Name: " + el.Name.LocalName);
		break;
	}

Answer 1

Hi, Markus Freitag
Distinct Method returns distinct elements from a sequence.
An XML file must have one and only one root node, and all other nodes must be its child nodes. In your example there are three root nodes.
You can print the root node before the loop.

Trace.WriteLine(result.Root!.Name);           
 foreach (var name in result.Root!.DescendantNodes().OfType<XElement>().Select(x => x.Name))
            {
                switch (name.LocalName)
                {
                    case "LANEA":
                        Trace.WriteLine("aa Name: " + name.LocalName);
                        break;
                    case "LANEB":
                        Trace.WriteLine("bb Name: " + name.LocalName);
                        break;
                    case "LANEC":
                        Trace.WriteLine("cc Name: " + name.LocalName);
                        break;
                    default:
                        Trace.WriteLine(name);
                        break;
                }

            }

Best regards,

Minxin Yu

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