WPF应用程序自定义路由事件

Question

我想像这样建立一些非常直接的东西：

<EventTrigger RoutedEvent="MyCustomEvent">
     <BeginStoryboard>
         <Storyboard>
             <DoubleAnimation Duration="00:00:00.1" Storyboard.TargetProperty="Opacity" To="1" />
         </Storyboard>
     </BeginStoryboard>
</EventTrigger>

所以我可以在代码中调用类似的东西：

MyCustomEvent.trigger()

如何在WPF应用程序中以简单快捷的方式在C＃中实现？

Answer 1

您必须对s1使用扩展方法，并使用RoutedEvent方法。

示例：

UIElement.RaiseEvent

用法

XAML

public static class EventHandlerExtension
{
    public static void TriggerThisEvent(this RoutedEvent routedEvt, FrameworkElement felem)
    {
        RoutedEventArgs args = new RoutedEventArgs(routedEvt, felem);
        felem.RaiseEvent(args);
    }
}

CODE

   <TextBox x:Name="Tbx" Text="type something here...">
        <TextBox.Triggers>
            <EventTrigger RoutedEvent="LostFocus">
                <BeginStoryboard>
                    <Storyboard>
                        <DoubleAnimation Duration="00:00:03" Storyboard.TargetProperty="Opacity" To="0" />
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </TextBox.Triggers>
    </TextBox>