系统事件和从睡眠状态恢复
想象一下,我正在创建一个应用程序来测量某个用户登录计算机的时间(我正在编写的实际应用程序有所不同,但这并不重要)。
我需要跟踪用户何时登录、注销、何时挂起计算机(“关机”菜单中的“待机”选项)以及计算机何时从睡眠状态恢复。
我正在使用 SystemEvents
(具体来说,PowerModeChanged
和 SessionSwitch
事件),它大部分都有效,但有一个例外:
当计算机挂起时,会正确引发 PowerModeChanged
事件与模式暂停
。
当计算机恢复时,将引发 PowerModeChanged
,模式为 Resume
。到目前为止,一切都很好。
之后,将引发 SessionSwitch
事件,原因是 SessionLock
。但是当我最终在恢复后登录时,没有SessionUnlock
。
此行为发生在 Windows XP 上,我需要它才能在 XP、Vista 和 7 上正常工作。
有没有办法接收此解锁?
Imagine I was creating an application that measured how long a certain user is logged in to a computer (the actual application I'm writing is different, but that doesn't matter).
I need to track when the user logs in, logs out, when he suspends the computer (“stand by“ choice in the Shut Down menu) and when the computer resumes from sleep.
I am using SystemEvents
(specifically, PowerModeChanged
and SessionSwitch
events) for that and it mostly works, with one exception:
When the computer is suspended, the PowerModeChanged
event is correctly raised with the mode Suspend
.
When the computer resumes, PowerModeChanged
is raised with the mode Resume
. So far so good.
Right after that, SessionSwitch
event is raised with the reason SessionLock
. But when I eventually log in after the resume, there is no SessionUnlock
.
This behavior happens on Windows XP, and I need this to work correctly on XP, Vista and 7.
Is there a way how to receive this unlock?
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事实证明,我的一位处理程序存在未捕获的异常。显然,这阻止了后续事件的发生。
Turns out there was an uncaught exception in one of my handlers. Apparently, this stopped subsequent events from firing.