C# 在 WPF 应用程序中获取不活动/空闲时间
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Getting inactivity/idle time in a WPF application
提问by paradisontheitroad
I was looking for the best approach to find out the if my users are idle in my WPF application. Currently, I take this idle time from operating system, and if they minimize the application, and go and search in Internet, there is a process in the operating system, so Operation system does not consider this as inactivity time even though they are not doing anything inside the application. However, I would like to find out if they have not clicked or do anything inside my application.
我一直在寻找最佳方法来确定我的用户是否在我的 WPF 应用程序中空闲。目前，我把这个空闲时间从操作系统中取出来，如果他们最小化应用程序，然后在互联网上搜索，操作系统中有一个进程，所以即使他们没有这样做，操作系统也不认为这是不活动时间应用程序中的任何内容。但是，我想知道他们是否没有在我的应用程序中单击或执行任何操作。
This is how I can that idle time right now.
这就是我现在空闲时间的方式。
myApplication.MainMethod()
{
System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
myTimer .Interval = 1000;
myTimer .Tick += new EventHandler(Timer_Tick);
myTimer .Start();
}
void Timer_Tick(object sender, EventArgs e)
{
int idleTime= (int)Win32.GetIdleTime();
if (idleTime<certainNumber)
{
//do this
}
}
回答by Sergey Aldoukhov
回答by xt1
See this answer: Application.Idle event not firing in WPF application
请参阅此答案： Application.Idle 事件未在 WPF 应用程序中触发
ComponentDispatcher.ThreadIdle is the event you are looking for.
ComponentDispatcher.ThreadIdle 是您正在寻找的事件。
回答by Andreas
public MainWindow()
{
InitializeComponent();
ComponentDispatcher.ThreadIdle += new System.EventHandler(ComponentDispatcher_ThreadIdle);
}
void ComponentDispatcher_ThreadIdle(object sender, EventArgs e)
{
//do your idle stuff here
}
回答by AnjumSKhan
For such scenarios, we need a
Timerwhich fires back someeventafter atimeinterval.And most importantly, we need a
callback / eventhandlerwhich gets called everytime any activity of any kind happens in our application, so that we know that our application isrunning.
对于这种情况，我们需要 a在 a 之后
Timer回火。eventtimeinterval最重要的是，我们需要
callback / eventhandler每次在我们的应用程序中发生任何类型的活动时都会调用它，以便我们知道我们的应用程序是running.
Point 1 can be handled using DispatcherTimer.
可以使用 处理第 1 点DispatcherTimer。
Point 2 can be handled using public event CanExecuteRoutedEventHandler CanExecute;.
可以使用 处理第 2 点public event CanExecuteRoutedEventHandler CanExecute;。
Putting it altogether :
总而言之：
MainWindow.xaml
主窗口.xaml
xmlns:cmd="clr-namespace:System.Windows.Input; assembly=Presentationcore"
xmlns:cmd="clr-namespace:System.Windows.Input; assembly=Presentationcore"
<!-- a do nothing button -->
<Button Command="{x:Static cmd:NavigationCommands.BrowseBack}" Visibility="Collapsed">
<Button.CommandBindings>
<!-- we can use any pre-defined / user-defined command -->
<CommandBinding Command="{x:Static cmd:NavigationCommands.BrowseBack}" CanExecute="CommandBinding_CanExecute_1"/>
</Button.CommandBindings>
</Button>
MainWindow.xaml.cs
主窗口.xaml.cs
public partial class MainWindow: Window
{
DispatcherTimer timer = new DispatcherTimer(DispatcherPriority.ApplicationIdle);
bool running = true;
public MainWindow()
{
InitializeComponent();
timer.Interval = TimeSpan.FromSeconds(5);
timer.Tick += timer_Tick;
timer.Start();
}
private void CommandBinding_CanExecute_1(object sender, CanExecuteRoutedEventArgs e)
{
running = true;
e.CanExecute = true;
}
void timer_Tick(object sender, EventArgs e)
{
if (!running)
App.Current.Shutdown();
running = false;
}
}
We can easily extend this approach to fit our needs.
我们可以轻松扩展这种方法以满足我们的需求。
