使用ObservableCollection<T>作为FIFO堆栈

我认为你基本上是在寻找一个队列。队列是先进先出机制(与堆栈相反,堆栈是先进后出机制)

ObservableCollection 不支持此场景。您可以做什么:

• INotifyCollectionChanged

• 或:子类 可观测收集 ,在更新内容时挂起通知,然后引发 Reset 事件

• 或者:创建两个单独的集合,并在它们之间切换:在更新B时暴露A,然后在更新A时暴露B

class ObservableQueue<T> : Queue<T>, INotifyCollectionChanged
{
    public ObservableQueue()
    {
    }

    public ObservableQueue(int capacity) : base(capacity)
    {
    }

    public ObservableQueue(IEnumerable<T> collection) : base(collection)
    {
    }

    public event NotifyCollectionChangedEventHandler CollectionChanged;

    public new void Clear()
    {
        base.Clear();
        if(this.CollectionChanged != null)
            CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
    }

    public new void Enqueue(T item)
    {
        base.Enqueue(item);
        if (this.CollectionChanged != null)
            CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add));
    }

    public new T Dequeue()
    {
        T item = base.Dequeue();
        if (this.CollectionChanged != null)
            CollectionChanged(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove));
        return item;
    }
}