xml – C# XmlDocument SelectNodes is not working

xml – C# XmlDocument SelectNodes is not working

You need something like this:

XmlDocument xmldoc = new XmlDocument();
xmldoc.Load(@D:tempcontacts.xml);  // use the .Load() method - not .LoadXml() !!

// get a list of all <Contact> nodes
XmlNodeList listOfContacts = xmldoc.SelectNodes(/Contacts/Contact);

// iterate over the <Contact> nodes
foreach (XmlNode singleContact in listOfContacts)
{
   // get the Profiles/Personal subnode
   XmlNode personalNode = singleContact.SelectSingleNode(Profiles/Personal);

   // get the values from the <Personal> node
   if (personalNode != null)
   {
      string firstName = personalNode.SelectSingleNode(FirstName).InnerText;
      string lastName = personalNode.SelectSingleNode(LastName).InnerText;
   }

   // get the <Email> nodes
   XmlNodeList emailNodes = singleContact.SelectNodes(Emails/Email);

   foreach (XmlNode emailNode in emailNodes)
   {
      string emailTyp = emailNode.SelectSingleNode(EmailType).InnerText;
      string emailAddress = emailNode.SelectSingleNode(Address).InnerText;
   }
}

With this approach, you should be able to read all the data you need properly.

The XML tags are case dependent so contact != Contact.

Change this for a start.

xml – C# XmlDocument SelectNodes is not working

The issue is that SelectNodes method takes a XPath expression that is case sensitive.

XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load(TheXMLFile.xml);

            Console.WriteLine($Contact: {xmldoc.DocumentElement.SelectNodes(Contact).Count}); // return 2
            Console.WriteLine($/Contact: {xmldoc.DocumentElement.SelectNodes(/Contact).Count}); // return 0, and it is the expected!
            Console.WriteLine($//Contact: {xmldoc.DocumentElement.SelectNodes(//Contact).Count}); // return 2

            foreach (XmlNode firstName in xmldoc.DocumentElement.SelectNodes(//Profiles/Personal/FirstName))
            {
                Console.WriteLine($firstName {firstName.InnerText});
            }

In the code above you can see 2 first names, My First Name and Person. I just change the first char to upper case contact -> Contact.