Question

How can I read the xml file having contents :

<?xml version="1.0" encoding="utf-8"?>
<A>
   <B value="1">
     <Hash algo="SHA256" value="905C45B51B970434D7159641D9F6A88DC91E9C35030618A729C8E4BE174711AF" />
   </B>
   <B value="2">
     <Hash algo="SHA256" value="649721FF455E9B100E691A3857696350E14364029C34C9438AB3EA9665C91292" />
   </B>
   <B value="3">
     <Hash algo="SHA256" value="90FC91C4B82BF440FDAFECF3303DCA8FB9F2E9D7EFFAE394D8B74D0C7CD7DA10" />
   </B>
</A>

In the above xml file I want to read the values of all B tag’s “value” attribute values and the tag Hash “algorithm” or “value” attributes value.

Here is the code that I am using:

        var settings = new XmlReaderSettings();
        settings.IgnoreWhitespace = true;
        using (var stm = new FileStream(@"xmlFilePath", FileMode.Open, FileAccess.Read, FileShare.Read))
        using (var reader = XmlReader.Create(stm, settings))
        {
            while (reader.Read())
            {
                string srcFileHash=null;
                reader.ReadToDescendant("B");
                if (reader.NodeType == XmlNodeType.Element && reader.LocalName == "B")
                {
                    reader.MoveToAttribute("value");
                    var bValue=reader.Value;   // get the B tag attribute value.

                    //also want to read the <hash value=? and algo=?. but I dnt know how to get these hash tag attributes.
                }
            }
        }

Answer 1

XDocument xDoc = XDocument.Parse(xml);
var result = xDoc.Descendants("B")
    .Select(b => new
    {
        BValue = b.Attribute("value").Value,
        Alg = b.Element("Hash").Attribute("algo").Value,
        AlgValue = b.Element("Hash").Attribute("value").Value,
    })
    .ToArray();