wp7高级容器怎么动态更新数据

全景视图Panorama    这里面最有意思的就是这个背景图片了。。会随着你的移动而移动，视觉效果非常的好，右边还会提示下一页的内容，当然这个内容展示就像一个圈一样，没有尽头。可以一直翻

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7                 笔记本
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13                     HTC
14                     苹果
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枢轴视图Pivot的用法，类似于我们操作系统的菜单

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10                     HTC
11                     苹果
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ScrollViewer用于显示大内容，显示尺寸不够则可以通过滚动条控制。HorizontalScrollBarVisibility、VerticalScrollBarVisibility控制滚动条显示

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如果我们想在用户拉到最底下时动态的更新新的数据，想微博那样一直往下拉，会加载新的内容，我们可以在下拉到底部的时候给控件注册个事件来达到我们的需求

1 ScrollViewerMonitor svm = new ScrollViewerMonitor(sv1);
2             svm.AtEnd += new EventHandler(svm_AtEnd);
3         }
4
5         void svm_AtEnd(object sender, EventArgs e)
6         {
7             for (int i=0; i < 10; i++)
8             {
9                 Button btn = new Button();
10                 btn.Content = Guid.NewGuid().ToString().Substring(0, 5);
11                 wp1.Children.Add(btn);
12             }
13         }

下面是ScrollViewerMonitor类的内容，

动态监视scrollViewer.VerticalOffset的值当它超过本身的高度的时候就触发AtEnd 事件，我们可以在外部注册这个事件！

1 public class ScrollViewerMonitor
2     {
3         private ScrollViewer scrollViewer;
4
5         private static int index;
6
7         public ScrollViewerMonitor(ScrollViewer scrollViewer)
8         {
9             this.scrollViewer = scrollViewer;
10
11             var property = DependencyProperty.RegisterAttached("DependencyPropertyListener" + index++,
12                 typeof(double), typeof(ScrollViewer), new PropertyMetadata(scrollViewerVerticalOffset_Changed));
13
14             Binding binding = new Binding("VerticalOffset") { Source = scrollViewer };
15             scrollViewer.SetBinding(property, binding);
16         }
17
18         public event EventHandler AtEnd;
19
20         private void scrollViewerVerticalOffset_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
21         {
22             bool atBottom = scrollViewer.VerticalOffset
23                                     >= scrollViewer.ScrollableHeight;
24
25             if (atBottom)
26             {
27                 if (AtEnd != null)
28                 {
29                     AtEnd(this, EventArgs.Empty);
30                 }
31             }
32         }
33     }