通知属性更改字典

Question

我有一个WPF/XAML表单数据绑定到字典中的属性,类似于:

<TextBox Text="{Binding Path=Seat[2B].Name}">

Seat暴露为IDictionary<String, Reservation>飞机物体上的属性.

class airplane
{
    private IDictionary<String, Reservation> seats;
    public IDictionary<String, Reservation> Seat
    {
        get { return seats; }
        // set is not allowed
    }
}

从我的窗口代码中,有时会更改座位2B的值,之后,我想通知UI该属性已更改.

class MyWindow : Window
{
    private void AddReservation_Click(object sender, EventArgs e)
    {
        airplane.Seat["2B"] = new Reservation();
        // I want to override the assignment operator (=)
        // of the Seat-dictionary, so that the airplane will call OnNotifyPropertyChanged.
    }
}

我看看是否有词典IObservable,所以我可以观察它的变化,但它似乎不是.

是否有任何好方法可以"抓住"飞机级字典中的更改,以便我可以NotifyPropertyChanged.

Answer 1

WPF博士ObservableDictionary在此链接上创建了一个链接:http://drwpf.com/blog/2007/09/16/can-i-bind-my-itemscontrol-to-a-dictionary/

更新: WPF博士在以下链接中发表的评论表明他已经自行解决了这个问题,因此不再需要进行以下更改

此外,还在此链接添加了一个内容:http://10rem.net/blog/2010/03/08/binding-to-a-dictionary-in-wpf-and-silverlight

微小的变化是

// old version
public TValue this[TKey key]
{
    get { return (TValue)_keyedEntryCollection[key].Value; }
    set { DoSetEntry(key, value);}
}

// new version
public TValue this[TKey key]
{
    get { return (TValue)_keyedEntryCollection[key].Value; }
    set
    {
        DoSetEntry(key, value);
        OnPropertyChanged(Binding.IndexerName);
    }
}