Windows 7 Power Management

The previous article introduced how to manage network resources in Windows 7. In addition, the Windows API Code Pack also provides power management functions. This article will continue to demonstrate how to perform Power Management in Windows 7 through simple instances.

First, add TabControl and TabItem for The XAML code section to display the power status information.

<Grid>    <TabControl x:Name="tabControl">        <TabItem x:Name="tabItem" Header="Power Management Info">        </TabItem>    </TabControl></Grid>

The AddProperty () method in the previous example can be used to add relevant property information. Create LoadPowerMgmt () method and obtain power status data through the PowerManager class.

private void LoadPowerMgmt(){    StackPanel stackPanel = new StackPanel();    stackPanel.Orientation = Orientation.Vertical;    AddProperty("Power Personality: ", PowerManager.PowerPersonality.ToString(), stackPanel);    AddProperty("Power Source: ", PowerManager.PowerSource.ToString(), stackPanel);    AddProperty("Is Battery Persent: ", PowerManager.IsBatteryPresent.ToString(), stackPanel);    AddProperty("Is UPS Present: ", PowerManager.IsUpsPresent.ToString(), stackPanel);    AddProperty("Is Battery Short Term: ", PowerManager.IsBatteryShortTerm.ToString(), stackPanel);    AddProperty("Battery Life (%) : ", PowerManager.BatteryLifePercent.ToString(), stackPanel);    AddProperty("Is Monitor Required: ", PowerManager.MonitorRequired.ToString(), stackPanel);    AddProperty("Is Monitor On: ", PowerManager.IsMonitorOn.ToString(), stackPanel);       tabItem.Content = stackPanel;}

Call the LoadPowerMgmt () method in MainWindow () to automatically load the program. In this way, we can see the power details obtained by the LoadPowerMgmt () method in the Tab.

public MainWindow(){    InitializeComponent();    LoadPowerMgmt();}

In addition to obtaining the above static data, you can also add dynamic power events for the program. The following code adds the BatteryLifePercentChanged event to Window_Loaded. When the battery power changes, the related event is triggered.

private void Window_Loaded(object sender, RoutedEventArgs e){    PowerManager.BatteryLifePercentChanged += new EventHandler(BatteryLifePercentChanged);        }  

Add the event content to BatteryLifePercentChanged. When the BatteryLifePercentChanged, modify the progress bar and Label value. For other power events, see PowerSourceChanged, SystemBusyChanged, PowerPersonalityChanged, and IsMonitorOnChanged.

private void BatteryLifePercentChanged(object sender, EventArgs e){    powerBar.Value = PowerManager.BatteryLifePercent;    powerVal.Content = string.Format("{0}%", PowerManager.BatteryLifePercent.ToString());}

Run the program:

Source code download

PowerMgmt.zip