1.引用:

2.xaml:                    
                                                                       FontFamily="{StaticResource PhoneFontFamilySemiBold}"
                                           FontSize="48"
                                           Margin="8,0,0,0"
                                           Foreground="White"                                     
                                           VerticalAlignment="Bottom"/>             
                     
                                                                    Padding="8,0,0,0" Width="62" Height="62"               
                                        HorizontalAlignment="Left">
                                                                               Foreground="#FFFFFF"
                                               FontSize="48"
                                               FontFamily="{StaticResource PhoneFontFamilySemiLight}"
                                               HorizontalAlignment="Left"
                                               VerticalAlignment="Bottom"/>
 
3.后台cs代码

public partial class MainPage : PhoneApplicationPage
{
    // Constructor
    public MainPage()
    {
        InitializeComponent();
        Loaded += new RoutedEventHandler(MainPage_Loaded);
        LongList.SelectionChanged += new SelectionChangedEventHandler(LongList_SelectionChanged);
    }

void LongList_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (LongList.SelectedItem != null)
        {
            var d = LongList.SelectedItem as mydata;
            if (d != null)
            {
            
            }
        }
    }

void MainPage_Loaded(object sender, RoutedEventArgs e)
    {
        List> dt = new List>();
        for (int i = 0; i < 10; i++)
        {
            dt.Add(new Group(i.ToString(), getContent(i)));
        }
        LongList.ItemsSource = dt;
    }

IEnumerable getContent(int k)
    {
        List dt = new List();
        for (int i = 0; i < 10; i++)
        {
            dt.Add(new mydata() { Name = i.ToString() + "key", Content = i.ToString() + "val" });
        }
        return dt;
    }
}

public class Group : IEnumerable
{
    public Group(S groupItem, IEnumerable items)
    {
        this.GroupItem = groupItem;
        this.Items = new List(items);
    }

public override bool Equals(object obj)
    {
        Group other = obj as Group;
        return (other != null) && (GroupItem.Equals(other.GroupItem));
    }
    public override int GetHashCode()
    {
        return GroupItem.GetHashCode();
    }

public S GroupItem { get; set; }
    public IList Items { get; set; }

public IEnumerator GetEnumerator()
    {
        return Items.GetEnumerator();
    }

System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
        return Items.GetEnumerator();
    }
}

public class mydata
{
    public string Name { get; set; }
    public string Content { get; set; }
}