C# XML Parser

Question

I Implemented a XML parser in Java a while back, but I cant figure out how to do it in C#, as I am relatively new. Is there a similiar approach to this in C#?
My Parser should convert simple nodes from an XML file into objects. I am going to implement this into an WCF Service if that is relevant.

public class XMLParser {
Document document;

public XMLParser(String path) {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    try {
        DocumentBuilder builder = factory.newDocumentBuilder();
        document = builder.parse(new File(path));
    } catch (ParserConfigurationException | IOException | SAXException e) {
        e.printStackTrace();
    }
}


public ArrayList<RegisterEntry> getContent() {
    ArrayList<RegisterEntry> entries = new ArrayList<>();
    NodeList list = document.getElementsByTagName("RegisterEntry");
    for (int i = 0; i < list.getLength(); i++) {
        Node node = list.item(i);
        Element e = (Element) node;
        int id = Integer.parseInt(e.getAttribute("entryID"));
        String dateString = (e.getElementsByTagName("Date").item(0).getTextContent());
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
        LocalDateTime date = LocalDateTime.parse(dateString, formatter);
        String entryType = e.getElementsByTagName("EntryType").item(0).getTextContent();
        String entryText = e.getElementsByTagName("EntryText").item(0).getTextContent();
        String teacher = e.getElementsByTagName("Teacher").item(0).getTextContent();
        RegisterEntry entry = new RegisterEntry(id, entryType, teacher, entryText, date);
        entries.add(entry);
    }
    return entries;
}

Answer 1

You can see MSDN samples, like at :
XmlDocument Class

Answer 2

You can also look at xml serialization, which maps xml into poco objects

https://learn.microsoft.com/en-us/dotnet/standard/serialization/examples-of-xml-serialization

Answer 3

If you have sample XML then copy a complete (valid) sample to the clipboard then in a C# file go to the VS Edit menu and there is a special paste command for pasting the XML as a class. That will very conveniently generate C# classes. Then it is easy to use the JsonSerializer Class. In the past Newtonsoft was popular but Microsoft has improved .Net.

Answer 4

Hi @Vardyschon18 ,
To implement xml serialization in WCF services, you can see the following two documents.
By default, WCF uses the DataContractSerializer class to serialize data types, WCF also supports the XmlSerializer class.
Using the XmlSerializer Class.
https://learn.microsoft.com/en-us/dotnet/framework/wcf/feature-details/using-the-xmlserializer-class
The XmlSerializer sample demonstrates how to serialize and deserialize XmlSerializer-compatible types.
https://learn.microsoft.com/en-us/dotnet/framework/wcf/samples/xmlserializer-sample
Best regards,
Lan Huang

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