silverlight右键菜单实现

来源：互联网发布：tcl电视直播软件下载编辑：程序博客网时间：2024/05/16 06:33

1.添加一个<TextBlock>到Page.xaml中

<UserControl x:Class="rightClick.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <TextBlock x:Name="MyField">Right click please.</TextBlock>
   </Grid>
</UserControl>

　　2.在页面中设置silverlight的参数Windowless="true" (这一点是最关键的！！！！！)

        <asp:Silverlight ID="Silverlight1" runat="server" Height="480px"
            MinimumVersion="2.0.30523" Source="~/ClientBin/rightClick.xap"
Windowless="true" Width="640px" />
        <object data="data:application/x-silverlight," type="application/x-silverlight-2-b2" width="100%" height="100%">
            <param name="source" value="ClientBin/rightClick.xap"/>
            <param name="onerror" value="onSilverlightError" />
            <param name="background" value="white" />
            <param name="Windowless" value="true" />
            <a href="http://go.microsoft.com/fwlink/?LinkID=115261" style="text-decoration: none;">
                 <img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none"/>
            </a>
        </object>

　　3.最后修改Page.xaml.cs页面的代码

　　新建立一个ContextMenuInterceptor类.这个类是用来处理页面中“OnContextMenu”事件的.在用到HTMLPage对象你需要引入System.Window.Browser命名空间.

　　在调用e.PeventDefault()方法后,将会取消右键点击事件.所以silverlight不会捕捉到它.

　　在这里我们已经成功的拦截了右键点击事件,做我们想做的任何事情了.;)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Browser;

namespace rightClick
{
    public partial class Page : UserControl
    {
        ContextMenuInterceptor _cmi = null;
        public Page()
        {
            InitializeComponent();
            _cmi = new ContextMenuInterceptor(MyField);
        }

    }

    public class ContextMenuInterceptor
    {
        TextBlock TextField;

        public ContextMenuInterceptor(TextBlock textField)
        {
            TextField = textField;
            HtmlPage.Document.AttachEvent("oncontextmenu", this.OnContextMenu);
        }

        private void OnContextMenu(object sender, HtmlEventArgs e)
        {
            TextField.Text = "Right Clicked Blocked at " + e.OffsetX + "," + e.OffsetY;

            //Cancels the event if it is cancelable.
            e.PreventDefault();
        }
    }
}