源代码:
class Cons
{
public Cons()
{
BaseDir = AppDomain.CurrentDomain.BaseDirectory;
SetProperty();
}
private void SetProperty()
{
NowPlaying = "Hello";
}
public string NowPlaying{get; set; }
}
public partial class MainWindow
{
Cons Resources = new Cons()
public MainWindow()
{
txbl.DataContext = Resources;
Resources.NowPlaying = "NoHello";
}
}
一个文本块<Textblock x:Name="txbl" Text="{Binding NowPlaying, Mode=TwoWay}"/>
当我在MainWindow构造函数中设置NowPlaying属性时,属性更改为“NoHello”,但TextBlock文本属性仍然是Hello,即使我设置了绑定模式= TwoWay
答案 0 :(得分:1)
您提到的代码工作正常。文本块确实显示新值“NoHello”。 但是,如果您希望在加载文本块后更新属性值NowPlaying,请在类Cons上实现INotifyPropertyChanged,并在属性NowPlaying的setter中引发PropertyChanged。