C# Wpf动画一次关闭导致火灾关闭事件两次

我为我的应用程序窗口使用一个基本窗口类

• BaseWindow

• main窗口

现在，我在

BaseWindow

类的

OnClosing

中编写了一个动画，如下所示：

void AnimationWindowBase_Closing(object sender, EventArgs e)
{
    if (!CloseAnimationIsDone)
    {
        ((CancelEventArgs) e).Cancel = true;
        var closeAnimation1 = new DoubleAnimation
        {
            From = RestoreBounds.Top,
            To = RestoreBounds.Top + 10,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        };
        closeAnimation1.Completed += (s, eArgs) =>
        {
            CloseAnimationIsDone = true;

            // This line cause fire close again in MainWindow class
            Close();
        };
        BeginAnimation(TopProperty, closeAnimation1);

        BeginAnimation(OpacityProperty, new DoubleAnimation
        {
            From = 1,
            To = 0,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        });
    }
}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
    AppConfigs.SaveAll();
}

protected override void OnClosing(CancelEventArgs e)
{
    base.OnClosing(e);

    if (!e.Cancel)
        AppConfigs.SaveAll();
}

但是如果我在

main窗口中有一个
OnClosing
方法，如下所示：

void AnimationWindowBase_Closing(object sender, EventArgs e)
{
    if (!CloseAnimationIsDone)
    {
        ((CancelEventArgs) e).Cancel = true;
        var closeAnimation1 = new DoubleAnimation
        {
            From = RestoreBounds.Top,
            To = RestoreBounds.Top + 10,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        };
        closeAnimation1.Completed += (s, eArgs) =>
        {
            CloseAnimationIsDone = true;

            // This line cause fire close again in MainWindow class
            Close();
        };
        BeginAnimation(TopProperty, closeAnimation1);

        BeginAnimation(OpacityProperty, new DoubleAnimation
        {
            From = 1,
            To = 0,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        });
    }
}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
    AppConfigs.SaveAll();
}

protected override void OnClosing(CancelEventArgs e)
{
    base.OnClosing(e);

    if (!e.Cancel)
        AppConfigs.SaveAll();
}

然后设置将被保存2次

如何用一种好的方法解决它？
不要订阅
关闭
事件，而是尝试重写
一旦关闭
方法。基本窗口的
OnClosing
可以与
AnimationWindowBase\u Closing
方法具有相同的代码。但在主窗口中，您可以这样做：

void AnimationWindowBase_Closing(object sender, EventArgs e)
{
    if (!CloseAnimationIsDone)
    {
        ((CancelEventArgs) e).Cancel = true;
        var closeAnimation1 = new DoubleAnimation
        {
            From = RestoreBounds.Top,
            To = RestoreBounds.Top + 10,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        };
        closeAnimation1.Completed += (s, eArgs) =>
        {
            CloseAnimationIsDone = true;

            // This line cause fire close again in MainWindow class
            Close();
        };
        BeginAnimation(TopProperty, closeAnimation1);

        BeginAnimation(OpacityProperty, new DoubleAnimation
        {
            From = 1,
            To = 0,
            Duration = new Duration(TimeSpan.FromMilliseconds(500))
        });
    }
}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
    AppConfigs.SaveAll();
}

protected override void OnClosing(CancelEventArgs e)
{
    base.OnClosing(e);

    if (!e.Cancel)
        AppConfigs.SaveAll();
}