XML traversing using XmlDocument

Question

I have the following code, which I use to traverse the XML:

private void btn_readXML_Click(object sender, EventArgs e)
{
        var doc = new XmlDocument();         


        

Answer 1

Assuming your XML having following structure:

Example code using XmlNode.SelectNodes:

var doc = new XmlDocument();
doc.Load("e:\\contacts.xml");

//get root element of document   
XmlElement root = doc.DocumentElement;
//select all contact element having attribute X
XmlNodeList nodeList = root.SelectNodes("//Contact[@X]");
//loop through the nodelist
foreach (XmlNode xNode in nodeList)
{       
    //traverse all childs of the node
}

For different XPath Queries see this link.

UPDATE:

If you want to select all elements having attribute X in the document. No matters where they exists. You could use following:

//select all elements in the doucment having attribute X
XmlNodeList nodeList = root.SelectNodes("//*[@X]");