XElement MapFromContact(Contact contact)
{
var elem = new XElement(
"Contact",
new XAttribute("Id", contact.Id),
new XElement("FirstName", contact.FirstName),
new XElement("LastName", contact.LastName),
new XElement("Email", contact.Email)
);
var nicknames = new XElement("Nicknames");
foreach (var nickname in contact.Nicknames)
nicknames.Add(new XElement("Nickname", nickname));
elem.Add(nicknames);
return elem;
}
private XElement GetContactNode(XDocument doc, Contact contact)
{
return doc.Descendants("Contact").Single(node => node.Attribute("Id").Value == contact.Id.ToString());
}
public void Insert(Contact contact)
{
var fileName = System.Web.HttpContext.Current.Server.MapPath("~/App_Data/Contacts.xml");
var xdoc = XDocument.Load(fileName);
contact.Id = xdoc.Descendants("Contact").Max(node=> (int)node.Attribute("Id")) + 1;
xdoc.Descendants("Contacts").First().Add(MapFromContact(contact));
xdoc.Save(fileName);
}
public Contact GetContact(int id)
{
var xdoc = XDocument.Load(XmlFile);
var contact = new Contact {Id = id };
var node = GetContactNode(xdoc, contact);
return MapToContact(node);
}
public void Edit(Contact contact)
{
var doc = XDocument.Load(XmlFile);
var nodeToReplace = GetContactNode(doc, contact);
nodeToReplace.ReplaceWith(MapFromContact(contact));
doc.Save(XmlFile);
}
public void Delete(Contact contact)
{
var doc = XDocument.Load(XmlFile);
var nodeToDelete = GetContactNode(doc, contact);
nodeToDelete.Remove();
doc.Save(XmlFile);
}