Windows Phone7监测网络接口及状态变化

当我们的手机进入到已知（PS:这个wlan网络必须是已经成功连接的）的wlan网络覆盖范围时，手机可以利用这个高速的wlan网络，那么我们第三方应用程序就有机会利用这个高带宽的网络接口进行通讯。

1. <Grid x:Name="LayoutRoot" Background="Transparent"> 
2.         <Grid.RowDefinitions> 
3.             <RowDefinition Height="Auto"/> 
4.             <RowDefinition Height="*"/> 
5.         </Grid.RowDefinitions> 
6.  
7.         <!--TitlePanel contains the name of the application and page title--> 
8.         <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28"> 
9.             <TextBlock x:Name="ApplicationTitle" Text="网络更改监测" Style="{StaticResource PhoneTextNormalStyle}"/> 
10.         </StackPanel> 
11.  
12.         <!--ContentPanel - place additional content here--> 
13.         <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"> 
14.             <Grid.RowDefinitions> 
15.                 <RowDefinition Height="Auto"/> 
16.                 <RowDefinition Height="Auto"/> 
17.                 <RowDefinition Height="Auto"/> 
18.                 <RowDefinition Height="*"/> 
19.                 <RowDefinition Height="Auto"/> 
20.                 <RowDefinition Height="Auto"/> 
21.                 <RowDefinition Height="Auto"/> 
22.             </Grid.RowDefinitions> 
23.             <TextBlock Grid.Row="0" Text="可用网络接口" FontSize="{StaticResource PhoneFontSizeLarge}"/> 
24.             <ListBox Grid.Row="1" x:Name="lbNetworkInterfaces" ItemsSource="{Binding}" Background="LightGray" > 
25.                 <ListBox.ItemTemplate> 
26.                     <DataTemplate> 
27.                         <TextBlock Text="{Binding}" Margin="5,5,0,5" Foreground="Black"/> 
28.                     </DataTemplate> 
29.                 </ListBox.ItemTemplate> 
30.             </ListBox> 
31.             <TextBlock Grid.Row="2" Text="事件" FontSize="{StaticResource PhoneFontSizeLarge}"/> 
32.             <ScrollViewer Grid.Row="3" Background="LightGray" BorderThickness="1"> 
33.                 <ListBox x:Name="lbNetworkChanges" ItemsSource="{Binding}"> 
34.                     <ListBox.ItemTemplate> 
35.                         <DataTemplate> 
36.                             <TextBlock Text="{Binding}" Foreground="Black"  
37.                                     FontSize="{StaticResource PhoneFontSizeNormal}" TextWrapping="Wrap" Margin="5,10,0,10"  /> 
38.                         </DataTemplate> 
39.                     </ListBox.ItemTemplate> 
40.                 </ListBox> 
41.             </ScrollViewer> 
42.             <TextBlock Grid.Row="4" Text="网络状态" FontSize="{StaticResource PhoneFontSizeLarge}"/> 
43.             <Grid Grid.Row="5" Background="LightGray" > 
44.                 <Grid.RowDefinitions> 
45.                     <RowDefinition Height="Auto"/> 
46.                     <RowDefinition Height="Auto"/> 
47.                     <RowDefinition Height="Auto"/> 
48.                 </Grid.RowDefinitions> 
49.                 <Grid.ColumnDefinitions> 
50.                     <ColumnDefinition Width="Auto"/> 
51.                     <ColumnDefinition Width="*"/> 
52.                 </Grid.ColumnDefinitions> 
53.                 <TextBlock Grid.Row="0" Grid.Column="0" Text="IsNetworkAvailable" Foreground="Black" Margin="5,5,0,5" /> 
54.                 <TextBlock Grid.Row="0" Grid.Column="1" x:Name="tbIsNetworkAvailable" HorizontalAlignment="Center" Foreground="Black" /> 
55.  
56.                 <TextBlock Grid.Row="1" Grid.Column="0" Text="IsWiFiEnabled" Foreground="Black" Margin="5,5,0,5" /> 
57.                 <TextBlock Grid.Row="1" Grid.Column="1" x:Name="tbIsWiFiEnabled" HorizontalAlignment="Center" Foreground="Black"/> 
58.  
59.                 <TextBlock Grid.Row="2" Grid.Column="0" Text="IsCellularDataEnabled" Foreground="Black" Margin="5,5,0,5" /> 
60.                 <TextBlock Grid.Row="2" Grid.Column="1" x:Name="tbIsCellularDataEnabled" HorizontalAlignment="Center" Foreground="Black"/> 
61.             </Grid> 
62.             <Button Grid.Row="6" x:Name="btnChangeNetworkSettings" Content="更改网络设置" Click="btnChangeNetworkSettings_Click"/> 
63.         </Grid> 
64.     </Grid> 

1. using System.Collections.ObjectModel; 
2. using Microsoft.Phone.Net.NetworkInformation; 
3. using Microsoft.Phone.Tasks; 

1. // 程序运行时，所有监测到变化集合。 
2.         public ObservableCollection<string> Changes { get; set; } 
3.  
4.         // 当前可用网络接口集合 
5.         public ObservableCollection<string> NetworkInterfaces { get; set; } 

1. //在回调函数中,进行检查变化。  
2.         //在demo中,创建了一个string类型的简单信息，并且添加到UI中。  
3.         //在实际应用中,可以利用网络变化，调整项目中的联网方式。  
4.         void ChangeDetected(object sender, NetworkNotificationEventArgs e) 
5.         { 
6.             string change = string.Empty; 
7.             switch (e.NotificationType) 
8.             { 
9.                 case NetworkNotificationType.InterfaceConnected: 
10.                     change = "连接到 "; 
11.                     break; 
12.                 case NetworkNotificationType.InterfaceDisconnected: 
13.                     change = "脱离 "; 
14.                     break; 
15.                 case NetworkNotificationType.CharacteristicUpdate: 
16.                     change = "网络变化 "; 
17.                     break; 
18.                 default: 
19.                     change = "未知变化 "; 
20.                     break; 
21.             } 
22.  
23.             string changeInformation = String.Format(" {0} {1} {2} ({3})", 
24.                         DateTime.Now.ToString(), change, e.NetworkInterface.InterfaceName, 
25.                         e.NetworkInterface.InterfaceType.ToString()); 
26.  
27.             //更新UI. 
28.             Dispatcher.BeginInvoke(() => 
29.             { 
30.                 Changes.Add(changeInformation); 
31.                 UpdateNetworkStatus(); 
32.                 UpdateNetworkInterfaces(); 
33.  
34.             }); 
35.  
36.         } 

1. private void UpdateNetworkInterfaces() 
2.         { 
3.  
4.             NetworkInterfaces.Clear(); 
5.             NetworkInterfaceList networkInterfaceList = new NetworkInterfaceList(); 
6.             foreach (NetworkInterfaceInfo networkInterfaceInfo in networkInterfaceList) 
7.             { 
8.                 NetworkInterfaces.Add(networkInterfaceInfo.InterfaceName); 
9.             } 
10.         } 
11.  
12.         private void UpdateNetworkStatus() 
13.         { 
14.             tbIsCellularDataEnabled.Text = (DeviceNetworkInformation.IsCellularDataEnabled) ? "是" : "否"; 
15.             tbIsNetworkAvailable.Text = (DeviceNetworkInformation.IsNetworkAvailable) ? "是" : "否"; 
16.             tbIsWiFiEnabled.Text = (DeviceNetworkInformation.IsWiFiEnabled) ? "是" : "否"; 
17.         } 

1. // 为了测试，提供了通过启动ConnectionSettingsTask来更改网络连接设置的方法。 
2.         // 由于模拟器的限制，我们并不能获取到所有NetworkAvailabilityChanged事件。 
3.         // 不过你可以通过真机，进行连接和取消连接wifi网络，进行测试。 
4.         private void btnChangeNetworkSettings_Click(object sender, RoutedEventArgs e) 
5.         { 
6.             MessageBox.Show("此操作将改变网络设置。设置成功后，你可以通过Back键，返回查看NetworkAvailabilityChanged事件。"); 
7.  
8.             //使用ConnectionSettingsTask启用连接设置 
9.             ConnectionSettingsTask connectionSettings = new ConnectionSettingsTask(); 
10.  
11.             //将连接设置更改为飞行模式 
12.             connectionSettings.ConnectionSettingsType = ConnectionSettingsType.AirplaneMode; 
13.             connectionSettings.Show(); 
14.  
15.             // 注意: 一旦我们改变了设置，可以使用物理Back键，进行观察NetworkAvailabilityChanged事件。 
16.         } 

此方法会启动飞行模式的ConnectionSettingsTask。我们可以通过设置飞行模式的打开或关闭。通过更改飞行模式的设置，返回到应用程序中，可以观察到因更改飞行模式引起的网络可用性更改。