Question

I’m currently doing a XML file that includes the “name” of the city, the “region”, “lat” latitude and “lng”.

Here is my Code:

XmlDocument XmlFile = new XmlDocument();
try {
    XmlFile.Load("..\\..\\liste.xml");
}
catch (Exception ex)
{
    Console.WriteLine("Erreur" + ex.Message);
};
XmlNodeList MyNodeXML = XmlFile.GetElementsByTagName("city");
foreach (XmlNode unNode in MyNodeXML)
{
    string nomVille = unNode.Attributes[0].Value;
    string lat = unNode.Attributes[1].Value;
    string lng = unNode.Attributes[2].Value;
    listeCooVilles.Add(nomVille, new PointF(float.Parse(lat), float.Parse(lng)));
}

Where listeCooVilles is a Dictionnary.

Here is my XML: I did a sample for test:

<?xml version="1.0" encoding="UTF-8"?>
<cities>
    <city>
        <name>Abercorn</name>
        <region>Montérégie</region>
        <lat>45.032999</lat>
        <lng>-72.663057</lng>
    </city>
<cities>

I saw many post doing the same as above in StackOverflow, but I still get an IndexOutOfRange Exception on the line

string nomVille = unNode.Attributes[0].Value;

Can someone help? Thanks!

Answer 1

The element has no attributes – only sub-elements. Attributes are name=value pairs at the same level as the element. E.g.

<?xml version="1.0" encoding="UTF-8"?>
<cities>
  <city name="Abercorn" region="Montérégie" lat="45.032999" lng="-72.663057" />
  <city name="Granby" region="Montérégie" lat="45.4" lng="-72.733333" />
</cites>

Nesting elements (as you have done originally) and using attributes (as you’ve coded for) are both equally valid ways of structuring your XML document.