的數據綁定到列表

Question

我所面臨的問題的對象，我有對象的名單，讓說的人：

class Person : INotifyPropertyChanged 
{ 
    public event PropertyChangedEventHandler PropertyChanged; 
    private string _name; 
    private string _surname; 
    public string name 
    { 
     get { return _name; } 
     set { SetField(ref _name, value, "name"); } 

    } 
    public string surname 
    { 
     get { return _surname; } 
     set { SetField(ref _surname, value, "surname"); } 

    } 
    protected virtual void OnPropertyChanged(string propertyName) 
    { 
     PropertyChangedEventHandler handler = PropertyChanged; 
     if (handler != null) 
     { 
      handler(this, new PropertyChangedEventArgs(propertyName)); 

     } 
    } 
    protected bool SetField<T>(ref T field, T value, string propertyName) 
    { 
     if (EqualityComparer<T>.Default.Equals(field, value)) return false; 
     field = value; 
     OnPropertyChanged(propertyName); 
     return true; 
    } 
} 

和XAML：

<TextBlock HorizontalAlignment="Left" Margin="310,167,0,0" TextWrapping="Wrap" Text="{Binding Path=name}" VerticalAlignment="Top" FontSize="36"/> 
    <TextBlock HorizontalAlignment="Left" Margin="585,167,0,0" TextWrapping="Wrap" Text="{Binding Path=surname}" VerticalAlignment="Top" FontSize="36"/> 
    <Button Content="Button" HorizontalAlignment="Left" Margin="721,355,0,0" VerticalAlignment="Top" Click="Button_Click"/> 

在頁面初始化我這樣做：

List<Person> Persons = new List<Person>(); 
    public MainPage() 
    { 
     this.InitializeComponent(); 

     Person a = new Person(); 
     a.name = "First"; 
     a.surname = "FirstSurname"; 
     Persons.Add(a); 
     Person b = new Person(); 
     b.name = "Second"; 
     b.surname = "SecondSurname"; 
     Persons.Add(b); 
     this.DataContext = Persons[0]; 
    } 

的，我不想改變的財產，但改變整個對象：

private void Button_Click(object sender, RoutedEventArgs e) 
    { 

     Person a = new Person(); 
     a.name = "Test"; 
     a.surname = "Test"; 
     Persons[0] = a; 
    } 

我怎樣才能讓我的TextBlocks自動reget數據？不要做this.DataContext =人[0];再次

Answer 1

在文本財產在你的TextBlock，嘗試設置UpdateSourceTrigger到的PropertyChanged：

Text="{Binding Path=name, UpdateSourceTrigger=PropertyChanged}"