在事件触发器中处理自定义RoutedEvent

Question

我有以下树 MainWindow - ＆gt;自定义UserControl - ＆gt; GroupBox - ＆gt;视框

我已将自定义路由事件添加到UserControl，如下：

  public static readonly RoutedEvent ConnectedEvent =
        EventManager.RegisterRoutedEvent("Connected", RoutingStrategy.Tunnel,
        typeof(RoutedEventHandler), typeof(IQMasterControl));

    public event RoutedEventHandler Connected
    {
        add { AddHandler(IQMasterControl.ConnectedEvent, value); }
        remove { RemoveHandler(IQMasterControl.ConnectedEvent, value); }
    }

事件的调用如下：

 _masterViewModel.Connected += delegate ()
        {
            RoutedEventArgs ea = new RoutedEventArgs(IQMasterControl.ConnectedEvent, this);
            this.RaiseEvent(ea);
        };

我想在ViewBox上运行一些动画＆＃34;已连接＆＃34;使用事件触发器的事件：

<Viewbox VerticalAlignment="Center"
                      Child="{StaticResource PDataIco}"
                      RenderTransformOrigin="0.5, 0.5" Stretch="Uniform">
                        <Viewbox.RenderTransform>
                            <!--  the transform a name tells the framework not to freeze it  -->
                            <RotateTransform x:Name="noFreeze" />
                        </Viewbox.RenderTransform>
                        <Viewbox.Triggers>
                            <EventTrigger RoutedEvent="local:IQMasterControl.Connected">
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation RepeatBehavior="Forever" Storyboard.TargetProperty="(Rectangle.RenderTransform).(RotateTransform.Angle)" To="360" Duration="0:0:1" />
                                    </Storyboard>
                                </BeginStoryboard>
                            </EventTrigger>
                        </Viewbox.Triggers>
                    </Viewbox>

我已检查过该事件已被引发，但ViewBox似乎没有收到该事件。因此，没有动画启动。

如果我将EventTrigger的RoutedEvent属性更改为另一个（f.e。已加载），则动画可以正常工作。

有人可以帮我吗？

Answer 1

您正在提升event的{​​{1}}。

UserControl没有提出。

有两种方法：

两者都需要为ViewBox添加名称：

ViewBox

1.为<Viewbox VerticalAlignment="Center" x:Name="ViewBox" Child="{StaticResource PDataIco}" RenderTransformOrigin="0.5, 0.5" Stretch="Uniform"> <Viewbox.RenderTransform> <!-- the transform a name tells the framework not to freeze it --> <RotateTransform x:Name="noFreeze" /> </Viewbox.RenderTransform> <Viewbox.Triggers> <EventTrigger RoutedEvent="local:IQMasterControl.Connected"> <BeginStoryboard> <Storyboard> <DoubleAnimation RepeatBehavior="Forever" Storyboard.TargetProperty="(Rectangle.RenderTransform).(RotateTransform.Angle)" To="360" Duration="0:0:1" /> </Storyboard> </BeginStoryboard> </EventTrigger> </Viewbox.Triggers> </Viewbox> ：

提高它

ViewBox

或

2.在_masterViewModel.Connected += delegate () { RoutedEventArgs ea = new RoutedEventArgs(IQMasterControl.ConnectedEvent, this); ViewBox.RaiseEvent(ea); }; 中处理它：

UserControl