XPathNavigator: Evaluate : XmlPathNavigator « XML « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. XML
3. XmlPathNavigator

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Xml.XPath;

class MainClass
{
    static void Main(string[] args)
    {
        string xml = "<Order>" +
                        "<Item>" +
                            "<Description>Some widget part</Description>" +
                            "<Price>12.99</Price>" +
                        "</Item>" +
                        "<Item>" +
                            "<Description>Another widget</Description>" +
                            "<Price>50.12</Price>" +
                        "</Item>" +
                    "</Order>";

        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xml);

        XPathNavigator nav = doc.CreateNavigator();
        Console.WriteLine("Total price for this order is ${0}", nav.Evaluate("sum(Order/Item/Price)"));
    }
}

Total price for this order is $63.11