C# determine if one of child elements has specific value in XElement

Question

Please consider this XML:

<MyRoot>
    <c1>0</c1>
    <c2>0</c2>
    <c3>0</c3>
    <c4>0</c4>
    <c5>1</c5>
    <c6>0</c6>
    <c7>0</c7>
    <c8>0</c8>
</MyRoot>

How can I write a lambda expression to find if one of child of MyRoot has 1 for it's value?

Thanks

Answer 1

This is pretty trivial using XDocument class and some linq which would be :

string xml=@"<MyRoot>
    <c1>0</c1>
    <c2>0</c2>
    <c3>0</c3>
    <c4>0</c4>
    <c5>1</c5>
    <c6>0</c6>
    <c7>0</c7>
    <c8>0</c8>
</MyRoot>";

     XDocument Doc = XDocument.Parse(xml);
     var nodes = from response in Doc.Descendants()
                 where response.Value == "1" 
                 select new {Name = response.Name, Value = response.Value };

    foreach(var node in nodes)
          Console.WriteLine(node.Name + ":  " + node.Value);

See the working DEMO Fiddle as example

with lambda:

var nodes = Doc.Descendants().Where(x=> x.Value == "1")
                           .Select(x=> {Name = x.Name, Value = x.Value });

Now you can iterate it:

foreach(var node in nodes)
      Console.WriteLine(node.Name + ":  " + node.Value);