檢測電源狀態變化

Question

檢測Windows電源狀態變化時的最佳方法是什麼？

我需要瓶坯取決於計算機是否進入待機/休眠一些動作/關機

Answer 1

的SystemEvents.PowerModeChanged事件應該做你想要

您可能還需要檢查出SystemInformation.PowerStatus屬性是什麼。

Answer 2

如果你需要睡眠的事件，這工作得更好：

private ManagementEventWatcher managementEventWatcher; 
    private readonly Dictionary<string, string> powerValues = new Dictionary<string, string> 
         { 
          {"4", "Entering Suspend"}, 
          {"7", "Resume from Suspend"}, 
          {"10", "Power Status Change"}, 
          {"11", "OEM Event"}, 
          {"18", "Resume Automatic"} 
         }; 
    public void InitPowerEvents() 
    { 
     var q = new WqlEventQuery(); 
     var scope = new ManagementScope("root\\CIMV2"); 

     q.EventClassName = "Win32_PowerManagementEvent"; 
     managementEventWatcher = new ManagementEventWatcher(scope, q); 
     managementEventWatcher.EventArrived += PowerEventArrive; 
     managementEventWatcher.Start(); 
    } 
    private void PowerEventArrive(object sender, EventArrivedEventArgs e) 
    { 
     foreach (PropertyData pd in e.NewEvent.Properties) 
     { 
      if (pd == null || pd.Value == null) continue; 
      var name = powerValues.ContainsKey(pd.Value.ToString()) 
          ? powerValues[pd.Value.ToString()] 
          : pd.Value.ToString(); 
      Console.WriteLine("PowerEvent:"+name); 
     } 
    } 
    public void Stop() 
    { 
     managementEventWatcher.Stop(); 
    }