<?xml version="1.0" encoding="utf-8" ?>
<China><city><id>1</id><name>北京</name><description>中国的首都</description></city><city><id>2</id><name>深圳</name><description>经济繁荣</description></city><city><id>3</id><name>广州</name><description>很大的城市</description></city><city><id>4</id><name>香港</name><description>亚洲金融中心</description></city><province><id>1</id><name>广东省</name><city><id>5</id><name>佛山</name><description>功夫之地</description></city><city><id>6</id><name>河源</name><description>天是蓝的</description></city></province>
</China>

    public class City{private int id;public int Id{get { return id; }set { id = value; }}private string  name;public string  Name{get { return name; }set { name = value; }}private string  description;public string  Description{get { return description; }set { description = value; }}       }public class Province//这个是为了测试
    {private int id;public int Id{get { return id; }set { id = value; }}private string name;public string Name{get { return name; }set { name = value; }}private List<City> cities;public List<City> Cities{get { return cities; }set { cities = value; }}

            <StackPanel Orientation="Horizontal"><Button Name="getxml" Content="获取数据1" Width="100" Height="40" VerticalAlignment="Top" Click="getxml_Click"/><Button Name="getxml2" Content="获取数据2" Width="100" Height="40" VerticalAlignment="Top" Click="getxml2_Click" Margin="80,0,0,0"/></StackPanel><ListView x:Name="datalist" Margin="0, 50,0,0"><ListView.ItemTemplate><DataTemplate><StackPanel Orientation="Horizontal"><TextBlock Text="{Binding Id}" Style="{ThemeResource TitleTextBlockStyle}"/><StackPanel Orientation="Vertical"><TextBlock Text="{Binding Name}" Style="{ThemeResource ListViewItemContentTextBlockStyle}"/><TextBlock Text="{Binding Description}" Style="{ThemeResource BodyTextBlockStyle}"/></StackPanel></StackPanel></DataTemplate></ListView.ItemTemplate></ListView>

private async void getxml_Click(object sender, RoutedEventArgs e){//在windows8.1中还可以获取xml文件，但在WP8.1会出错，我不知道为什么，求解释//string path = Path.Combine(Package.Current.InstalledLocation.Path, "DataModel/city.xml");//文件Uri//XDocument xmlfile = XDocument.Load(path);//在Windows8.1和WP8.1中都可以执行,获取xml文件
            XDocument xmlfile;Uri fileUri = new Uri(@"ms-appx:///DataModel/city.xml");//ms-appx:// 为安装目录var file = await Windows.Storage.StorageFile.GetFileFromApplicationUriAsync(fileUri);//获取city.xml文件， XDocument.Load（）可利用stream，Uri，xmlreader等几种方法获取文件using (var stream = await file.OpenStreamForReadAsync())//文件操作都要转换成流
            {xmlfile = XDocument.Load(stream);};var data = from query in xmlfile.Descendants("city")//获取city.xml中所有名为city节点select new City{Id = (int)query.Element("id"),Name = (string)query.Element("name"),Description = (string)query.Element("description")};datalist.ItemsSource = data;}private async void getxml2_Click(object sender, RoutedEventArgs e){datalist.ItemsSource = null;XDocument xmlfile;Uri fileUri = new Uri(@"ms-appx:///DataModel/city.xml");//ms-appx:// 为安装目录var file = await Windows.Storage.StorageFile.GetFileFromApplicationUriAsync(fileUri);//获取city.xml文件using (var stream = await file.OpenStreamForReadAsync())//文件操作都要转换成流
            {xmlfile = XDocument.Load(stream);};var data = from query in xmlfile.Descendants("city")where (string)query.Parent.Element("name") =="广东省"//linq to xml 选择id<3的cityorderby (int)query.Element("id")select new City{Id = (int)query.Element("id"),Name = (string)query.Element("name"),Description = (string)query.Element("description")};datalist.ItemsSource = data;                       }