binding - WPF 绑定(bind) : how to make property being changed when the property of it's property changed

Question

我创建了类:

class StorageBase
{
    public Queue<Slices> Slices {get;set;}
}

和 wpf 自定义控件，它具有 StorageBase 类型的依赖属性 Storage:

public StorageBase Storage
        {
            get { return (StorageBase)GetValue(StorageProperty); }
            set { SetValue(StorageProperty, value); }
        }
        public static readonly DependencyProperty StorageProperty =
            DependencyProperty.Register("Storage", typeof(StorageBase), typeof(MaterialStreamControl), new UIPropertyMetadata(null, new PropertyChangedCallback(OnStoragePropertyChanged)));
        static void OnStoragePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            (d as MaterialStreamControl).Render();
        }

如果存储中的切片发生更改，我如何重新渲染组件？

Answer 1

通常 StorageBase 会实现 INotifyPropertyChanged。然后 Slices 上的 setter 将引发 INotifyPropertyChanged.PropertyChanged 事件。

示例:http://msdn.microsoft.com/en-us/library/system.componentmodel.inotifypropertychanged.propertychanged.aspx

编辑:您可能还想让 Slices 成为 ObservableCollection 而不是队列。
http://msdn.microsoft.com/en-us/library/ms668604.aspx