WP8在Sliverlight框架下如何监听DataContextChanged

来源：互联网发布：模糊控制算法简介编辑：程序博客网时间：2024/06/06 02:53

FrameworkElement具有DataContext属性，代表绑定的数据源，在开发的时候有时需要监听其变化，在WinRt框架上有DataContext属性，但是在Sliverlight框架下没有，在此自己实现了该接口的子类。代码如下：

namespace xxx{    public delegate void DataContextChangedHandler(object sender, object newData);    public class NotifyUserControl : FrameworkElement    {        public NotifyUserControl(){            SetBinding(MyDataContextChangedProperty,new Binding());        }        public event DataContextChangedHandler DataContextChanged;        private static readonly DependencyProperty MyDataContextChangedProperty =            DependencyProperty.Register("MyDataContext", typeof(object), typeof(NotifyUserControl), new PropertyMetadata(null, (DependencyObject d, DependencyPropertyChangedEventArgs e) =>            {                var view = d as NotifyUserControl;                if (view.DataContextChanged != null)                {                    view.DataContextChanged(view, e.NewValue);                }            }));    }}

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