DelayedExecute
実行するアクションを受け取り、遅延実行の必要に応じてタイマーを作成するメソッドを公開するクラスを定義できます。次のようになります。
public static class DelayedExecutionService
{
// We keep a static list of timers because if we only declare the timers
// in the scope of the method, they might be garbage collected prematurely.
private static IList<DispatcherTimer> timers = new List<DispatcherTimer>();
public static void DelayedExecute(Action action, int delay = 3)
{
var dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
// Add the timer to the list to avoid it being garbage collected
// after we exit the scope of the method.
timers.Add(dispatcherTimer);
EventHandler handler = null;
handler = (sender, e) =>
{
// Stop the timer so it won't keep executing every X seconds
// and also avoid keeping the handler in memory.
dispatcherTimer.Tick -= handler;
dispatcherTimer.Stop();
// The timer is no longer used and shouldn't be kept in memory.
timers.Remove(dispatcherTimer);
// Perform the action.
action();
};
dispatcherTimer.Tick += handler;
dispatcherTimer.Interval = TimeSpan.FromSeconds(delay);
dispatcherTimer.Start();
}
}
次に、次のように呼び出すことができます。
DelayedExecutionService.DelayedExecute(() => MessageBox.Show("Hello!"));
また
DelayedExecutionService.DelayedExecute(() =>
{
DoSomething();
DoSomethingElse();
});