How can I get single node data using linq

Question

I have the following xml file

  
    1
    Computer
    Infor         


        

Answer 1

You can use LINQ to XML like

XDocument xDoc = XDocument.Load("test.XML");
var item = xDoc.Descendants("category")
               .FirstOrDefault(r => r.Element("id").Value == "1");
if(item == null)
   return;

string Name = item.Element("name").Value;
string Decription = item.Element("description").Value;
string active = item.Element("active").Value;

You can assign the results to your TextBoxes as per your requirement.

Answer 2

Load it first with XDocument

XDocument test = XDocument.Load("test.xml");

then,

    var qry = (from item in test.Descendants("category")
      where item.Element("id").Value == 1
      select new
      {
         Name = (string)test.Element("name").Value
         Description = (string)test.Element("description").Value
         Active = (string)test.Element("active").Value
      }).FirstOrDefault();

This created an anonymous type and you can now display your data like this:

if (qry != null) {
Console.WriteLine(qry.Name);
Console.WriteLine(qry.Description);
Console.WriteLine(qry.Active);
}

Answer 3

var xml = XDocument.Parse(xmlDataString);

var categoryElement = xml.Root
    .Elements("category")
    .FirstOrDefault(e => (string)e.Element("id") == "1");

Answer 4

Simply deserialize given XML in object and apply LINQ to Objects. MSDN

Answer 5

How about using Linq To Xml and converting the elements to a Dictionary<string,string>?

var xDoc = XDocument.Parse(xml);
int id=1;

var dict = xDoc.XPathSelectElement("//category[id=" + id + "]")
            .Elements()
            .ToDictionary(e=>e.Name.LocalName , e=>(string)e);

Console.WriteLine(dict["description"]);