稳扎稳打Silverlight(41) - 3.0Tip/Trick之GPU 加速, Out-Of-Browser, 应用程序库缓存

/* 
 * Application.InstallStateChanged - 浏览器外运行的相关状态发生改变时所触发的事件 
 * Application.InstallState - 浏览器外运行的相关状态 [System.Windows.InstallState 枚举] 
 *         NotInstalled - 在浏览器中运行 
 *         Installing - 安装到桌面中 
 *         Installed - 在浏览器外运行 
 *         InstallFailed - 安装到桌面的过程中发生错误 
 * Application.IsRunningOutOfBrowser - 当前程序是否是从浏览器外启动的 
 * Application.Install() - 安装 Silverlight 程序到浏览器外（卸载只能通过右键菜单的方式卸载） 
 * Application.CheckAndDownloadUpdateAsync, Application.CheckAndDownloadUpdateCompleted - 一对异步方法/事件，用于更新浏览器外运行的 Silverlight 程序（从服务器上下载新的版本） 
 *    
 * 注：在 Silverlight 项目上单击右键 -> 属性 -> Out-of-Browser Settings 可以对“浏览器外运行”的相关参数做设置（也可以手动修改 Properties/OutOfBrowserSettings.xml） 
 */ 
 
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 Silverlight30.Tip 
{ 
         public partial  class OutOfBrowser : Page 
        { 
                 public OutOfBrowser() 
                { 
                        InitializeComponent(); 
                         
                         this.Loaded +=  new RoutedEventHandler(OutOfBrowser_Loaded); 
                } 
 
                 void OutOfBrowser_Loaded( object sender, RoutedEventArgs e) 
                { 
                        InitButton(); 
 
                        App.Current.InstallStateChanged +=  new EventHandler(Current_InstallStateChanged); 
                } 
 
                 void Current_InstallStateChanged( object sender, EventArgs e) 
                { 
                        InitButton(); 
                } 
 
                 private  void InitButton() 
                { 
                         if (App.Current.IsRunningOutOfBrowser) 
                        { 
                                button.Content =  "卸载"; 
                        } 
                         else 
                        { 
                                button.Content =  "安装"; 
                        } 
                } 
 
                 private  void button_Click( object sender, RoutedEventArgs e) 
                { 
                         if (!App.Current.IsRunningOutOfBrowser && App.Current.InstallState == InstallState.NotInstalled) 
                        { 
                                App.Current.Install(); 
                        } 
                         else 
                        { 
                                MessageBox.Show( "请右键卸载"); 
                        } 
                } 
        } 
}