C# 绑定到单例的TextBlock数据未在WPF中更新

我为这个新手问题道歉，但我正在努力解决这个问题。我定义了以下文本块：

<TextBlock Text="{Binding Source={x:Static local:DeviceManager.Instance},
 Path=Player.CurrentArtist}"></TextBlock>

---

用户界面如何知道何时更改播放器属性？从这段代码来看，它看起来并没有向我提出PropertyChanged。你能发布这个问题的完整工作示例吗？否则我们只能猜测。

问题是，WPF从未被通知

CurrentArtister

属性的值发生更改。您可以为

CurrentArtister

属性实现一个私有setter，它将触发

PropertyChanged

事件，或者为

MediaPlayer.Play（）中的
CurrentArtister
属性触发
PropertyChanged
事件。

WPF仅在传入名称时响应PropertyChanged（即，现在的“Player:Song”）与您绑定的属性相同-将PropertyChanged更改为“CurrentArtister”，您将看到它正确更新。

您没有引发PropertyChanged事件，您需要的是：

public sealed class DeviceManager : INotifyPropertyChanged
{
    // Singleton members omitted

    public IPlayer Player
    {
        get { return player; }
        set
        {
            this.player = value;
            OnPropertyChanged(this, new PropertyChangedEventArgs("Player"));
        }
    }

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(sender, e);
        }
    }

    #endregion
}

public sealed class DeviceManager : INotifyPropertyChanged
{
    // Singleton members omitted

    public IPlayer Player
    {
        get { return player; }
        set
        {
            this.player = value;
            OnPropertyChanged(this, new PropertyChangedEventArgs("Player"));
        }
    }

    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(sender, e);
        }
    }

    #endregion
}