<Grid>     <StackPanel Height="295" HorizontalAlignment="Left" Margin="10,10,0,0" Name="stackPanel1" VerticalAlignment="Top" Width="427">         <TextBlock Height="23" Name="textBlock1" Text="学员编号:" />         <TextBox Height="23" Name="txtStudentId" Width="301" HorizontalAlignment="Left"/>         <TextBlock Height="23" Name="textBlock2" Text="学员列表:" />         <ListBox Height="156" Name="lbStudent" Width="305" HorizontalAlignment="Left">             <ListBox.ItemTemplate>                 <DataTemplate>                     <StackPanel Name="stackPanel2" Orientation="Horizontal">                         <TextBlock  Text="{Binding Id,Mode=TwoWay}" Margin="5" Background="Beige"/>                         <TextBlock Text="{Binding Name,Mode=TwoWay}" Margin="5"/>                         <TextBlock  Text="{Binding Age,Mode=TwoWay}" Margin="5"/>                     </StackPanel>                 </DataTemplate>             </ListBox.ItemTemplate>         </ListBox>         <Button Content="Button" Height="23" Name="button1" Width="75" HorizontalAlignment="Left" Click="button1_Click" />     </StackPanel> </Grid>

ObservableCollection<Students> infos = new ObservableCollection<Students>() {     new Students(){ Id=1, Age=11, Name="Tom"},     new Students(){ Id=2, Age=12, Name="Darren"},     new Students(){ Id=3, Age=13, Name="Jacky"},     new Students(){ Id=4, Age=14, Name="Andy"}     }; public Bind7() {     InitializeComponent();      this.lbStudent.ItemsSource = infos;     this.txtStudentId.SetBinding(TextBox.TextProperty, new Binding("SelectedItem.Id") { Source = lbStudent }); } private void button1_Click(object sender, RoutedEventArgs e) {     infos[1] = new Students() { Id = 4, Age = 14, Name = "这是一个集合改变" };     infos[2].Name = "这是一个属性改变"; } public class Students {     public int Id { get; set; }     public string Name { get; set; }     public int Age { get; set; } }

public class Students : INotifyPropertyChanged {     string _name;     public int Id { get; set; }     public string Name     {         get { return _name; }         set { _name = value; OnPropertyChanged("Name"); }     }     public int Age { get; set; }     protected internal virtual void OnPropertyChanged(string propertyName)     {         if (PropertyChanged != null)             PropertyChanged(this, new PropertyChangedEventArgs(propertyName));     }     public event PropertyChangedEventHandler PropertyChanged; }