稳扎稳打Silverlight(67) 5.0被信任的应用程序之访问本地文件系统, 支持多窗口, 被信任的程序在浏览器中运行, Call Windows API

稳扎稳打Silverlight(67) - 5.0被信任的应用程序之访问本地文件系统, 支持多窗口, 被信任的程序在浏览器中运行, Call Windows API

作者：webabcd

介绍
Silverlight 5.0 被信任的应用程

AccessFileSystem - 访问本地文件系统
MultipleWindows - 支持多窗口
In Browser - 被信任的程序在浏览器中运行
Call Windows API

在线DEMO
http://www.cnblogs.com/webabcd/archive/2012/03/05/2379862.html

示例
1、AccessFileSystem（访问本地文件系统）
TrustedApplication/AccessFileSystem.xaml

<navigation:Page x:Class="Silverlight50.TrustedApplication.AccessFileSystem" 
           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"
           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           d:DesignWidth="640" d:DesignHeight="480"
           Title="AccessFileSystem Page">
    <StackPanel x:Name="LayoutRoot" HorizontalAlignment="Left">

        <TextBlock Text="在不使用 OpenFileDialog 和 SaveFileDialog 的情况下，访问本地文件系统" />

        <!-- 显示“C盘”中的文件夹列表 -->
        <ListBox Name="listBoxDirectory" HorizontalAlignment="Left">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding Name}" Margin="1" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

        <!-- 显示“C盘”中的文件列表 -->
        <ListBox Name="listBoxFile" HorizontalAlignment="Left">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding Name}" Margin="1" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

    </StackPanel>
</navigation:Page>

TrustedApplication/AccessFileSystem.xaml.cs

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;

using System.IO;

namespace Silverlight50.TrustedApplication
{
    public partial class AccessFileSystem : Page
    {
        public AccessFileSystem()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            if (!App.Current.IsRunningOutOfBrowser)
            {
                MessageBox.Show("请在OOB中运行");
                LayoutRoot.Visibility = Visibility.Collapsed;
            }

            // Application.Current.HasElevatedPermissions - 判断 OOB 模式中的应用程序是否为被信任的应用程序
            if (Application.Current.HasElevatedPermissions)
            {
                // 获取 C 盘的目录信息
                DirectoryInfo root = new DirectoryInfo(@"C:\");
                listBoxDirectory.ItemsSource = root.EnumerateDirectories();
                listBoxFile.ItemsSource = root.EnumerateFiles();
            }
        }
    }
}

2、MultipleWindows（支持多窗口）
TrustedApplication/MultipleWindows.xaml

<navigation:Page x:Class="Silverlight50.TrustedApplication.MultipleWindows" 
           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"
           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           d:DesignWidth="640" d:DesignHeight="480"
           Title="MultipleWindows Page">
    <Grid x:Name="LayoutRoot" Background="White">
        
        <Button Name="btn" Content="新开窗口" Click="btn_Click" />
        
    </Grid>
</navigation:Page>

TrustedApplication/MultipleWindows.xaml.cs

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 Silverlight50.TrustedApplication
{
    /// <summary>
    /// 演示对多窗口的支持
    /// </summary>
    public partial class MultipleWindows : Page
    {
        Random _random = new Random();

        public MultipleWindows()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            if (!App.Current.IsRunningOutOfBrowser)
            {
                MessageBox.Show("请在OOB中运行");
                LayoutRoot.Visibility = Visibility.Collapsed;
            }
        }

        private void btn_Click(object sender, RoutedEventArgs e)
        {
            // Application.Current.HasElevatedPermissions - 判断 OOB 模式中的应用程序是否为被信任的应用程序
            if (Application.Current.HasElevatedPermissions)
            {
                /*
                 * Window - OOB 模式下的应用程序窗口
                 *   Height - 窗口的高
                 *   Width - 窗口的宽
                 *   Top - 窗口距顶部的距离
                 *   Left - 窗口距左侧的距离
                 *   Title - 窗口的标题
                 *   Visibility - 窗口的可见性
                 *   Content - 窗口的内容
                 *   TopMost - 窗口是否显示在最前面
                 *   IsActive - 是否为激活窗口（仅 get）
                 *   IsVisible - 窗口是否可见（仅 get）
                 *   WindowState - 窗口的状态（WindowState.Normal，WindowState.Minimized，WindowState.Maximized）
                 *   WindowStyle - 窗口的样式（WindowStyle.None，WindowStyle.SingleBorderWindow，WindowStyle.BorderlessRoundCornersWindow）
                 *   
                 *   Activate() - 激活窗口，使之具有焦点，并置于最前面
                 *   Window.Close() - 关闭窗口
                 *   
                 *   Closing - 窗口关闭前触发的事件
                 */

                Window newWindow = new Window();
                newWindow.Height = 400;
                newWindow.Width = 500;
                newWindow.Top = 1 + _random.Next(0, 100);
                newWindow.Left = 1 + _random.Next(0, 100);
                newWindow.Title = "新窗口";
                newWindow.Visibility = Visibility.Visible;

                // 添加一个内部有按钮的 Canvas，设置 Canvas 的背景色为白色
                Button btn = new Button();
                btn.Width = 80.0;
                btn.Height = 30.0;
                btn.Content = "点  击";
                btn.Margin = new Thickness(5, 10, 0, 0);
                btn.Click += new RoutedEventHandler(btn_Click);
                Canvas canvas = new Canvas();
                canvas.Children.Add(btn);
                canvas.Background = new SolidColorBrush(Colors.White);
                newWindow.Content = canvas;

                newWindow.WindowState = WindowState.Normal;
            }
        }
    }
}

3、In Browser（被信任的程序在浏览器中运行）
TrustedApplication/InBrowser.xaml

<navigation:Page x:Class="Silverlight50.TrustedApplication.InBrowser" 
           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"
           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           d:DesignWidth="640" d:DesignHeight="480"
           Title="InBrowser Page">
    <StackPanel x:Name="LayoutRoot" Orientation="Vertical" HorizontalAlignment="Left">

        <HyperlinkButton TargetName="_blank" NavigateUri="http://msdn.microsoft.com/en-us/library/gg192793(v=vs.96).aspx" Content="如何使在浏览器中运行的程序成为被信任的程序（需要管理员介入）" />
            
    </StackPanel>
</navigation:Page>

4、Call Windows API
TrustedApplication/CallWindowsAPI.xaml

<navigation:Page x:Class="Silverlight50.TrustedApplication.CallWindowsAPI" 
           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"
           xmlns:navigation="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Navigation"
           d:DesignWidth="640" d:DesignHeight="480"
           Title="CallWindowsAPI Page">
    <StackPanel x:Name="LayoutRoot">
        
        <Button Content="C 盘的驱动器类型" Click="Button_Click" />

    </StackPanel>
</navigation:Page>

TrustedApplication/CallWindowsAPI.xaml.cs

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;

using System.Runtime.InteropServices;

namespace Silverlight50.TrustedApplication
{
    public partial class CallWindowsAPI : Page
    {
        public CallWindowsAPI()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            if (!App.Current.IsRunningOutOfBrowser)
            {
                MessageBox.Show("请在OOB中运行");
                LayoutRoot.Visibility = Visibility.Collapsed;
            }
        }

        // 演示如何调用 Windows API
        [DllImport("kernel32.dll")]
        static extern int GetDriveType(string lpRootPathName);

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            // Application.Current.HasElevatedPermissions - 判断 OOB 模式中的应用程序是否为被信任的应用程序
            if (Application.Current.HasElevatedPermissions)
            {
                MessageBox.Show("C 盘的驱动器类型：" + GetDriveType(@"c:\"));
            }
        }

        // 注：非托管代码回调托管代码时，托管代码应加上 [AllowReversePInvokeCalls] 标记
    }
}

OK
[源码下载]

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原文地址：https://www.cnblogs.com/webabcd/p/2410946.html