实现 ICollectionViewLiveShaping

How is ICollectionViewLiveShaping为了过滤的目的而实施？是不是类似：

public ICollectionView WorkersEmployed { get; set; }

WorkersEmployed = new CollectionViewSource { Source = GameContainer.Game.Workers }.View;

我没有使用GetDefaultView因为我需要这个集合上的多个过滤器实例。如果重要的话，GameContainer.Game.Workers is an ObservableCollection.

ApplyFilter(WorkersEmployed);

private void ApplyFilter(ICollectionView collectionView)
{
    collectionView.Filter = IsWorkerEmployed;
}

public bool IsWorkerEmployed(object item)
{
    Worker w = item as Worker;
    return w.EmployerID == this.ID;
}

这一切都有效，但当然必须手动刷新，这就是我尝试使用的原因ICollectionViewLiveShaping。实时过滤如何工作？

Update:看来添加属性的唯一方法ICollectionViewLiveShaping's LiveFilteringProperties集合是通过字符串进行的。鉴于该限制，是否甚至可以按另一个类中的属性（在本例中为工人的 EmployerID）进行过滤？

在这种情况下我尝试做的事情是一个可行的选择吗？

你需要做的就是add a property in LiveFilteringProperties您希望过滤器在属性更改时调用并设置IsLiveFiltering to true供您收藏to enable live filtering.

确保PropertyChanged每当EmployerID财产变化，即您的Worker类应该实现INotifyPropertyChangedEvent.

这将起作用 -

public ICollectionViewLiveShaping WorkersEmployed { get; set; }

ICollectionView workersCV = new CollectionViewSource
                         { Source = GameContainer.Game.Workers }.View;

ApplyFilter(workersCV);

WorkersEmployed = workersCV as ICollectionViewLiveShaping;
if (WorkersEmployed.CanChangeLiveFiltering)
{
    WorkersEmployed.LiveFilteringProperties.Add("EmployerID");
    WorkersEmployed.IsLiveFiltering = true;
}