如何在silverlihgt中使用右键

一般我们在silverlight中点击右键会出现如下的对话筐.



在flash中 其提供了一个可定制话的右键菜单系统.( ContextMenu)

这个在silverlight中也是一样可以做到的.

过程如下:

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"

         < 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();
        }
    }
}

原文地址: http://silverlight.net/blogs/msnow/archive/2008/07/01/tip-of-the-day-14-how-to-right-click-on-a-silverlight-application.aspx