wpf自定义路由事件用于eventtrigger

WPF自定义路由事件可以用于EventTrigger，以便在事件发生时触发相应的操作。以下是一个示例：

首先，定义一个自定义路由事件，例如：

public static readonly RoutedEvent MyCustomEvent = EventManager.RegisterRoutedEvent(
    "MyCustomEvent", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(MyClass));

public event RoutedEventHandler MyCustomEventHandler
{
    add { AddHandler(MyCustomEvent, value); }
    remove { RemoveHandler(MyCustomEvent, value); }
}

private void RaiseMyCustomEvent()
{
    RoutedEventArgs args = new RoutedEventArgs(MyClass.MyCustomEvent);
    RaiseEvent(args);
}

然后，在XAML中使用EventTrigger来触发操作，例如：

<Button Content="Click me">
    <Button.Triggers>
        <EventTrigger RoutedEvent="local:MyClass.MyCustomEvent">
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="0" Duration="0:0:1" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Button.Triggers>
</Button>

在此示例中，当MyCustomEvent发生时，将启动一个Storyboard来将按钮的Opacity属性从1变为0。