Wpf 在windows phone中绑定属性源更改时如何呈现（重绘）usercontrol

我在Windows Phone中构建了一个控件（相同的WPF），按时间线绘制垂直图表。 在Xaml中：

怎么做？谢谢

在usercontrol中创建自定义事件

private event ItemsSourceChanged;

添加所有必需的代码以支持事件更改

现在触发属性更改事件

public IEnumerable<ITimelineData> ItemSource
{
    get { return base.GetValue(ItemSourceProperty) as IEnumerable<ITimelineData>; }
    set { base.SetValue(ItemSourceProperty, value); OnItemSourcePropertyChange(); }
}

public IEnumerable ItemSource
{
获取{return base.GetValue（ItemSourceProperty）作为IEnumerable；}
set{base.SetValue（ItemSourceProperty，value）；OnItemSourcePropertyChange（）；}
}

在xaml中，将事件映射到代码隐藏并进行更改

<myControl:VerticalChart ItemSource="{Binding ActivitiesToday}" ItemSourceChanged="doSomething" />

 Border border = new Border();
 border.Width = borderWidth;
 border.Height = ran.Next(100, 250);

 Binding binding = new Binding("Foreground");
 binding.Source = this;
 border.SetBinding(Border.BackgroundProperty, binding);

 double top = height - border.Height;
 Canvas.SetLeft(border, left);
 Canvas.SetTop(border, top);
 canvasRender.Children.Add(border);

private event ItemsSourceChanged;

public IEnumerable<ITimelineData> ItemSource
{
    get { return base.GetValue(ItemSourceProperty) as IEnumerable<ITimelineData>; }
    set { base.SetValue(ItemSourceProperty, value); OnItemSourcePropertyChange(); }
}

<myControl:VerticalChart ItemSource="{Binding ActivitiesToday}" ItemSourceChanged="doSomething" />