从 XDocument 中的 XML 解析嵌套节点

Question

I'm using .net to parse an XML. Below is the XML that needs to be parsed. I need to gather the id from Animal and info from AnimalName , AnimalPicture and AnimalPicture type.

<AnimalEntry version="2.0">
  <Animal id="1">
   <Information>
     <Type>
       Indoor Pet
     <Type>
    <AvailableTypes> //always only 1 type
      <AvailableType> 
         <Active> 
             <AnimalName> Rupert</AnimalName>
             <AnimalPictures>   //Always only 1 picture
                 <AnimalPicture type="jpg"> random.jpg <AnimalPicture> 
            </AnimalPictures>
         </Active>
      </AvailableType>
    </AvailableTypes>
    <Price>10000</Price>
   </Information>
  </Animal>
</AnimalEntry>

I can gather the id as follows:

            XmlDocument xDoc new XmlDocument();
            xDoc.Load(xmlUrl);

            XmlNode node = xDoc.DocumentElement.ChildNodes[0];
            string id = node.Attributes["id"].Value;

I'm not familiar on how to tackle the nested nodes. Is there a recommended way to get the nested AnimalName, AnimalPicture and OwnerId? Do I need to call a foreach or is there a way I can directly get the node?

Answer 1

Use linq to xml.

var xml = XElement.Load(xmlUrl);

int id = (int)xml.Element("Animal").Attribute("id");

var active = xml.Element("Animal")
    .Element("Information")
    .Element("AvailableTypes")
    .Element("AvailableType")
    .Element("Active");

var animalName = active.Element("AnimalName").Value;
var animalPictureNode = active.Element("AnimalPictures").Element("AnimalPicture");
var animalPicture = animalPictureNode.Value;
var animalPictureType = animalPictureNode.Attribute("type").Value;

Console.WriteLine(id);
Console.WriteLine(animalName);
Console.WriteLine(animalPicture);
Console.WriteLine(animalPictureType);

Open namespace:

using System.Xml.Linq;

Answer 2

using linq to xml, u can try something like this. If you this approach verbose, you can also try xpath using linq how-to-query-linq-to-xml-using-xpath

        XElement element = XElement.Parse("Xml data");

        foreach (XElement xe in element.Elements(XName.Get("Animal")))
        {
            string id = xe.Attribute(XName.Get("id")).Value;
            var allChildrens = xe.Descendants();

            string animalName = allChildrens.FirstOrDefault(x => x.Name == "AnimalName")?.Value;
            string animalPicture = allChildrens.FirstOrDefault(x => x.Name == "AnimalPicture")?.Value;
            string animalPictureType = allChildrens.FirstOrDefault(x => x.Name == "AnimalPicture")?.Attribute(XName.Get("type"))?.Value;
        }