运用Popup,自定义Silverlight右键菜单

   当我们打开silverlight的页面点击右键的时候，会千篇一律的出现那个系统菜单。有时候在项目中我们需要一些特殊的右键菜单设置。有了Popup我们就可以自己定义了。定义自己想要的右键菜单。直接上代码：

一，前台代码：

<UserControl x:Class="SLTest.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <TextBlock x:Name="txtStatus"  Width="300" HorizontalAlignment="Center"/>
        <Grid x:Name="zone" Height="200" Width="200" Background="Wheat" >
        </Grid>
        </Grid>
</UserControl>

 前台很简单，我想要的效果是在名称为zone的Grid区域内，显示自定义的菜单，屏蔽掉系统自带的右键。
二，后台代码

    public partial class MainPage : UserControl
    {
        Popup rootPopup = new Popup();//声明一个Popup对象

        public MainPage()
        {
            InitializeComponent();
            Loaded += new RoutedEventHandler(MainPage_Loaded);
        }

        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            //zone 区域的鼠标左键点击事件，这两个事件必须同时注册，否则屏蔽不掉系统右键菜单
            zone.MouseRightButtonDown += new MouseButtonEventHandler(zone_MouseRightButtonDown);
            zone.MouseRightButtonUp += new MouseButtonEventHandler(zone_MouseRightButtonUp);
        }

        /// <summary>
        /// 鼠标左键释放事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void zone_MouseRightButtonUp(object sender, MouseButtonEventArgs e)
        {
            rootPopup.IsOpen = true;//显示Popup
            rootPopup.Width = App.Current.Host.Content.ActualWidth;//设置Popup的宽度即当前区域的宽度
            rootPopup.Height = App.Current.Host.Content.ActualHeight;//设置Popup的高度即当前区域的高度

            Grid rootGrid = new Grid();
            ListBox listBox = new ListBox();

            for (int i = 0; i < 5; i++)
            {
                TextBlock txt = new TextBlock() { Text = "Item" + i.ToString() };//声明TextBlock对象即自定义菜单的项
                txt.MouseLeftButtonUp += new MouseButtonEventHandler(txt_MouseLeftButtonUp);//注册TextBlock的鼠标点击事件
                listBox.Items.Add(txt);
            }
            rootGrid.Children.Add(listBox);

            Point point = e.GetPosition(LayoutRoot);//获得当前鼠标点击的坐标
            rootPopup.Child = rootGrid;//设置Propup的承载的内容为rootGrid
            rootPopup.Margin = new Thickness(point.X, point.Y, 0, 0);//设置Propup的显示的位置
        }

        /// <summary>
        /// 自定义菜单的点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void txt_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            rootPopup.IsOpen = false;//点击之后隐藏Prpup
            txtStatus.Text = "你点击了：" + (sender as TextBlock).Text;//显示点击的内容
        }

        /// <summary>
        /// 鼠标左键点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void zone_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
            e.Handled = true;//屏蔽系统右键菜单
        }
    }

  至此已经全部完成。
运行效果如下：