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Categories / C# Tutorial / XML

 

Using XPathNavigator to loop through code

using System; using System.Collections.Generic; using System.IO; using System.Xml; using System.Xml.XPath;     public class Customer     {         public string FirstName { get; set; }         public string LastName { get; set; }         public string EmailAddress { get; set; }         public override string ToString()         {             return string.Format("{0} {1}\nEmail:   {2}",FirstName, LastName, EmailAddress);         }     }     public class Tester     {         static void Main()         {             List<Customer> customers = new List<Customer>{                 new Customer { FirstName = "A",                                 LastName = "G",                                EmailAddress = "o@a.com"},                 new Customer { FirstName = "B",                                 LastName = "C",                                EmailAddress = "k@a.com" },                 new Customer { FirstName = "D",                                 LastName = "C",                                EmailAddress = "d@a.com" },                 new Customer { FirstName = "E",                                 LastName = "G",                                EmailAddress = "j@a.com" },                 new Customer { FirstName = "L",                                 LastName = "H",                                EmailAddress = "l@a.com" }             };             XmlDocument customerXml = new XmlDocument();             XmlElement rootElem = customerXml.CreateElement("Customers");             customerXml.AppendChild(rootElem);             foreach (Customer customer in customers)             {                 XmlElement customerElem = customerXml.CreateElement("Customer");                 XmlAttribute firstNameAttr = customerXml.CreateAttribute("FirstName");                 firstNameAttr.Value = customer.FirstName;                 customerElem.Attributes.Append(firstNameAttr);                 XmlAttribute lastNameAttr = customerXml.CreateAttribute("LastName");                 lastNameAttr.Value = customer.LastName;                 customerElem.Attributes.Append(lastNameAttr);                 XmlElement emailAddress = customerXml.CreateElement("EmailAddress");                 emailAddress.InnerText = customer.EmailAddress;                 customerElem.AppendChild(emailAddress);                 rootElem.AppendChild(customerElem);             }             XPathNavigator nav = customerXml.CreateNavigator();             string xPath = "descendant::Customer[@FirstName='D']";             XPathNavigator navNode = nav.SelectSingleNode(xPath);             if (navNode != null)             {                 Console.WriteLine(navNode.OuterXml);                 XmlElement elem = navNode.UnderlyingObject as XmlElement;                 if (elem != null)                     Console.WriteLine(elem.OuterXml);                 else                     Console.WriteLine("Found the wrong node!");             }             else                 Console.WriteLine("Customer not found");         }     }