如何在Windows服務應用程序中使用PowerModelChanged事件？

Question

我寫了一個簡單的Windows服務來執行一些與PowerModelChanged相關的任務。但我不知道如何使用它。你們考慮我的流動代碼，並給我一些建議，請：

public partial class Service : ServiceBase 
    { 
     public Service() 
     { 
      InitializeComponent(); 
      this.CanHandlePowerEvent = true; 
      SystemEvents.PowerModeChanged += PowerModeChanged; 
     } 

     protected override void OnStart(string[] args) 
     { 
      Library.WriteUserLog("ON"); 
     } 

     protected override void OnStop() 
     { 
      Library.WriteUserLog("OFF"); 
     } 

     // Write log when user either logon or logoff 
     public void PowerModeChanged(object sender, PowerModeChangedEventArgs e) 
     { 
      switch (e.Mode) 
      { 
       case PowerModes.Resume: 
        Library.WriteUserLog("ON"); 
        break; 
       case PowerModes.Suspend: 
        Library.WriteUserLog("OFF"); 
        break; 
      } 
     } 
    } 

Answer 1

試試這個（沒有測試它，但它應該是這樣的）：

public partial class Service : ServiceBase 
    { 
     public Service() 
     { 
      InitializeComponent(); 
      this.CanHandlePowerEvent = true; 
     } 

     protected override void OnStart(string[] args) 
     { 
      Library.WriteUserLog("ON"); 
     } 

     protected override void OnStop() 
     { 
      Library.WriteUserLog("OFF"); 
     } 

     protected override bool OnPowerEvent(PowerBroadcastStatus powerStatus) 
     { 
      switch (powerStatus) 
      { 
       case PowerBroadcastStatus.ResumeSuspend: 
        Library.WriteUserLog("ON"); 
        break; 
       case PowerBroadcastStatus.Suspend: 
        Library.WriteUserLog("OFF"); 
        break; 
        // other statuses.... 
      } 
      return base.OnPowerEvent(powerStatus); 
     } 

     } 
    }