稳扎稳打Silverlight(43) - 4.0控件之WebBrowser, WebBrowserBrush

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稳扎稳打Silverlight(43) - 4.0控件之WebBrowser, WebBrowserBrush



作者:webabcd


介绍
Silverlight 4.0 控件一览:

  • WebBrowser - 在 Silverlight 应用程序中显示 HTML 内容(只能在 OOB 模式下运行)
  • WebBrowserBrush - 一个 WebBrowser 类型的画笔(只能在 OOB 模式下运行) 



在线DEMO
http://www.cnblogs.com/webabcd/archive/2010/08/09/1795417.html


示例
 1、Viewbox 的 Demo
WebBrowserDemo.xaml

代码
<navigation:Page x:Class="Silverlight40.Control.WebBrowserDemo" 
           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"
           xmlns:navigation
="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           Title
="WebBrowserDemo Page">
    
<Grid x:Name="LayoutRoot">
        
<StackPanel HorizontalAlignment="Left">

            
<Button Name="btnOutOfBrowser" Click="btnOutOfBrowser_Click" />

            
<Button Name="btnSource" Content="Source 属性" Click="btnSource_Click" />

            
<Button Name="btnNavigate" Content="Navigate 方法" Click="btnNavigate_Click" />

            
<Button Name="btnNavigateToString" Content="NavigateToString 方法" Click="btnNavigateToString_Click" />

            
<Button Name="btnScript" Content="与 WebBrowser 中的脚本交互" Click="btnScript_Click" />

            
<WebBrowser Name="webBrowser" Width="400" Height="300" ScriptNotify="webBrowser_ScriptNotify" LoadCompleted="webBrowser_LoadCompleted" />

        
</StackPanel>
    
</Grid>
</navigation:Page>


WebBrowserDemo.xaml.cs

代码
/*
 * WebBrowser - 在 Silverlight 应用程序中显示 HTML 内容(只能在 OOB 模式下运行)
 *     Source - 将指定的 URI 中的 HTML 内容显示在 WebBrowser 中
 *     Navigate() - 加载指定的 URI 中的 HTML 内容到 WebBrowser 中
 *     NavigateToString() - 显示指定的 HTML 内容
 *     SaveToString() - 获取当前 WebBrowser 所显示的 HTML 内容,返回一个字符串类型(不能跨域)
 *     InvokeScript() - 调用当前 WebBrowser 所加载的 HTML 内容中的 JavaScript 脚本(不能跨域)
 *     ScriptNotify - 当 WebBrowser 内的 JavaScript 以 “window.external.notify(string);” 的方式发送信息到 Silverlight 程序中时所触发的事件(不能跨域)
 *         NotifyEventArgs - ScriptNotify 事件的事件参数
 *         NotifyEventArgs.Value - JavaScript 发送到 Silverlight 程序中的信息。即 “window.external.notify(string);” 中的字符串
 
*/

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.Navigation;

namespace Silverlight40.Control
{
    
public partial class WebBrowserDemo : Page
    {
        
public WebBrowserDemo()
        {
            InitializeComponent();
        }

        
protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            
if (App.Current.IsRunningOutOfBrowser)
                btnOutOfBrowser.Content 
= "卸载";
            
else
                btnOutOfBrowser.Content 
= "安装";
        }

        
private void btnOutOfBrowser_Click(object sender, RoutedEventArgs e)
        {
            
if (!App.Current.IsRunningOutOfBrowser && App.Current.InstallState == InstallState.NotInstalled)
                App.Current.Install();
            
else
                MessageBox.Show(
"已经安装,使用右键卸载");
        }


        
private void btnSource_Click(object sender, RoutedEventArgs e)
        {
            webBrowser.Source 
= new Uri("http://webabcd.cnblogs.com");
        }

        
private void btnNavigate_Click(object sender, RoutedEventArgs e)
        {
            webBrowser.Navigate(
new Uri("http://www.cnblogs.com/webabcd/archive/2007/02/24/655035.html"));
        }

        
private void btnNavigateToString_Click(object sender, RoutedEventArgs e)
        {
            webBrowser.NavigateToString(
"<div style='color: red'>webabcd</div>");
        }

        
private void btnScript_Click(object sender, RoutedEventArgs e)
        {
            webBrowser.Navigate(
new Uri("http://localhost:9483/Silverlight40TestPage.html"));
        }

        
private void webBrowser_ScriptNotify(object sender, NotifyEventArgs e)
        {
            
// 获取 WebBrowser 中的 HTML 内所包含的 JavaScript 发给 Silverlight 程序的信息
            MessageBox.Show(e.Value);

            
// 调用 WebBrowser 中的 HTML 内所包含的 JavaScript 函数
            MessageBox.Show((string)webBrowser.InvokeScript("hello""webabcd"));   
        }

        
private void webBrowser_LoadCompleted(object sender, NavigationEventArgs e)
        {
            
try
            {
                
string html = webBrowser.SaveToString();
                MessageBox.Show(html);
            }
            
catch (System.Security.SecurityException se)
            {
                MessageBox.Show(se.Message);
            }
        }
    }
}


相关的 JavaScript 部分
Silverlight40TestPage.html

代码
    <script type="text/javascript">

        
// 此函数用于:Silverlight 程序调用 WebBrowser 所加载的 HTML 内容中的 JavaScript 函数
        function hello(name) {
            
return "hello: " + name;
        }

        
// 此方法用于:在 WebBrowser 所加载的 HTML 内容中用 JavaScript 向 Silverlight 程序发送信息
        try {
            window.external.notify(
'window.external.notify to silverlight');
        } 
catch (err) { } 
    
    
</script>



2、WebBrowserBrush 的 Demo
WebBrowserBrushDemo.xaml

代码
<navigation:Page x:Class="Silverlight40.Control.WebBrowserBrushDemo" 
           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"
           xmlns:navigation
="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           Title
="WebBrowserBrushDemo Page">
    
<Grid x:Name="LayoutRoot" MouseMove="LayoutRoot_MouseMove">
        
<StackPanel HorizontalAlignment="Left">

            
<Button Name="btnOutOfBrowser" Click="btnOutOfBrowser_Click" />

            
<WebBrowser Name="webBrowser" Width="200" Height="150" Source="http://webabcd.cnblogs.com" />

            
<!--
                演示在 Rectangle.Fill 中使用 WebBrowserBrush
            
-->
            
<Rectangle Width="200" Height="150" HorizontalAlignment="Left">
                
<Rectangle.Fill>
                    
<WebBrowserBrush x:Name="webBrowserBrushRectangle" SourceName="webBrowser" Opacity="0.7">
                        
<WebBrowserBrush.Transform>
                            
<ScaleTransform ScaleX="2" ScaleY="2" />
                        
</WebBrowserBrush.Transform>
                    
</WebBrowserBrush>
                
</Rectangle.Fill>
            
</Rectangle>

            
<!--
                演示在 Canvas.Background 中使用 WebBrowserBrush
            
-->
            
<Canvas Width="200" Height="150" HorizontalAlignment="Left">
                
<Canvas.Background>
                    
<WebBrowserBrush x:Name="webBrowserBrushCanvas" SourceName="webBrowser" Opacity="0.7" />
                
</Canvas.Background>
                
<Grid Width="200" Height="150">
                    
<TextBlock Text="我是在 Canvas 里的 TextBlock" HorizontalAlignment="Center" VerticalAlignment="Center" />
                
</Grid>
            
</Canvas>

            
<!--
                演示在 Path.Fill 中使用 WebBrowserBrush
            
-->
            
<Path StrokeThickness="10" Stroke="Red">
                
<Path.Data>
                    
<EllipseGeometry Center="100,75" RadiusX="100" RadiusY="75" />
                
</Path.Data>
                
<Path.Fill>
                    
<WebBrowserBrush x:Name="webBrowserBrushPath" SourceName="webBrowser" Opacity="0.7" />
                
</Path.Fill>
            
</Path>

        
</StackPanel>
    
</Grid>
</navigation:Page>


WebBrowserBrushDemo.xaml.cs

代码
/*
 * WebBrowserBrush - 一个 WebBrowser 类型的画笔(只能在 OOB 模式下运行)
 *     SourceName - 为此画笔提供 HTML 内容的 WebBrowser
 *     Redraw() - 重绘画笔。当 WebBrowser 所加载内容更改时,需要调用此方法
 
*/

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.Navigation;

namespace Silverlight40.Control
{
    
public partial class WebBrowserBrushDemo : Page
    {
        
public WebBrowserBrushDemo()
        {
            InitializeComponent();
        }

        
protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            
if (App.Current.IsRunningOutOfBrowser)
                btnOutOfBrowser.Content 
= "卸载";
            
else
                btnOutOfBrowser.Content 
= "安装";
        }

        
private void btnOutOfBrowser_Click(object sender, RoutedEventArgs e)
        {
            
if (!App.Current.IsRunningOutOfBrowser && App.Current.InstallState == InstallState.NotInstalled)
                App.Current.Install();
            
else
                MessageBox.Show(
"已经安装,使用右键卸载");
        }


        
private void LayoutRoot_MouseMove(object sender, MouseEventArgs e)
        {
            webBrowserBrushRectangle.Redraw();
            webBrowserBrushCanvas.Redraw();
            webBrowserBrushPath.Redraw();
        }
    }
}



OK
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posted @ 2010-08-12 09:44  webabcd  阅读(6395)  评论(11编辑  收藏  举报