诱捕ActiveSyncEnd事件：

我正在编写一个应用程序（PocketPc 2003上的.NET Compact Framework 3.5）我试图检测到摇篮事件，它被检测到但非常不稳定。例如，在每次检测时while循环运行两次。这是因为多次注册到ActiveSyncEnd事件？我该如何纠正？诱捕ActiveSyncEnd事件：

///NOTIFICATION_EVENT_NONE    = 0, 
    ///NOTIFICATION_EVENT_TIME_CHANGE   = 1, 
    ///NOTIFICATION_EVENT_SYNC_END   = 2, 
    ///NOTIFICATION_EVENT_ON_AC_POWER   = 3, 
    ///NOTIFICATION_EVENT_OFF_AC_POWER  = 4, 
    ///NOTIFICATION_EVENT_NET_CONNECT   = 5, 
    ///NOTIFICATION_EVENT_NET_DISCONNECT  = 6, 
    ///NOTIFICATION_EVENT_DEVICE_CHANGE  = 7, 
    ///NOTIFICATION_EVENT_IR_DISCOVERED  = 8, 
    ///NOTIFICATION_EVENT_RS232_DETECTED  = 9, 
    ///NOTIFICATION_EVENT_RESTORE_END   = 10, 
    ///NOTIFICATION_EVENT_WAKEUP    = 11, 
    ///NOTIFICATION_EVENT_TZ_CHANGE   = 12, 
    ///NOTIFICATION_EVENT_MACHINE_NAME_CHANGE = 13  

// In DeviceEventManager  
public void ActiveSyncEndDetect() 
{ 
    try 
    { 
     // Put 9 for cradle event, 2 for ActiveSyncEnd event, 0 for none. 
     handleActiveSyncEndEvent = NativeMethods.CreateEvent(IntPtr.Zero, false, false, "EventActiveSync");     
     while (!terminateDeviceEventThreads) 
     { 
      //NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 2); 
      //NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 9); 
      NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 2);      
      NativeMethods.WaitForSingleObject(handleActiveSyncEndEvent, 0xFFFFFFFF); 

      //MessageBox.Show("Activesync ended.");     
      //Do something here 

      NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 0); 
      } 
     } 
     catch (Exception e) 
     { 
      System.Windows.Forms.MessageBox.Show("Exception in ActiveSyncEndDetect method"); 
     } 
    }

来源

2009-10-14 Abhijeet Kashnia

感谢surfrbum ......（我以为我是唯一一个正在为此而苦恼的人。）你的建议是我以前的方法，但它不是很整齐。

不管怎么说，这是怎么了我最终设法解决它：

while (!terminateDeviceEventThreads) 
{ 
    handleActiveSyncEndEvent = NativeMethods.CreateEvent(IntPtr.Zero, 
             true, false, "EventActiveSync"); 
    if (IntPtr.Zero != handleActiveSyncEndEvent) 
    { 
     if (NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 
        (int)NOTIFICATION_EVENT.NOTIFICATION_EVENT_RS232_DETECTED)) 
     { 
      NativeMethods.WaitForSingleObject(handleActiveSyncEndEvent, 0xFFFFFFFF); 
      if (activeSyncEndDelegateInstance != null) 
      { 
       OnActiveSyncEnd(); 
      } 
      ResetEvent(handleActiveSyncEndEvent); 
      if (!NativeMethods.CeRunAppAtEvent("\\\\.\\Notifications\\NamedEvents\\EventActiveSync", 
          (int)NOTIFICATION_EVENT.NOTIFICATION_EVENT_NONE)) 
      { 
       break; 
      } 
      handleActiveSyncEndEvent = IntPtr.Zero; 
     } 
    } 
}

所以，按照这个周期：注册事件，发现引发事件，复位事件自己，注销事件。这样，摇篮检测逻辑变得非常可靠。

来源

2009-12-02 10:06:26

我已经注意到了这一点与Windows CE 5和ActiveSync。我不确定它是否是ActiveSync问题。你将不得不有一个标志来表明它是cradled并忽略其他后续的消息，直到你检测到从摇篮中删除然后将标志设置为0或false。

来源

2009-12-01 14:34:39

诱捕ActiveSyncEnd事件：

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