c# - 将事件从自定义控件传播到窗体

Question

我有一个自定义控件，例如:

public sealed class BorderEx : Control
{
    public static readonly RoutedEvent ReloadClickEvent = EventManager.RegisterRoutedEvent("ReloadClick", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(BorderEx));

    public event RoutedEventHandler ReloadClick
    {
        add { AddHandler(ReloadClickEvent, value); }
        remove { RemoveHandler(ReloadClickEvent, value); }
    }

    void RaiseReloadClickEvent()
    {
        var newEventArgs = new RoutedEventArgs(ReloadClickEvent);
        RaiseEvent(newEventArgs);
    }

    static BorderEx()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(BorderEx), new FrameworkPropertyMetadata(typeof(BorderEx)));
    }
}        

并且在 reloadButton 单击 generic.xaml 时会引发事件

<ControlTemplate TargetType="{x:Type cbr:BorderEx}">

<ControlTemplate.Triggers>

    <Trigger SourceName="reloadButton" Property="IsPressed" Value="True">
        <Setter TargetName="reloadButton" Property="Background" Value="Green"/>
        <EventSetter Event="ReloadClick" Handler="RaiseReloadClickEvent"></EventSetter>
    </Trigger>
</ControlTemplate.Triggers>

</ControlTemplate

但我不知道如何从内部按钮引发此外部事件。花了最后几个小时谷歌搜索，结果一无所获。以上 EventSetter 不工作。

Answer 1

这部分没问题，

    public static readonly RoutedEvent ReloadClickEvent = EventManager.RegisterRoutedEvent("ReloadClick", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(BorderEx));

    public event RoutedEventHandler ReloadClick
    {
        add { AddHandler(ReloadClickEvent, value); }
        remove { RemoveHandler(ReloadClickEvent, value); }
    }

    static BorderEx()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(BorderEx), new FrameworkPropertyMetadata(typeof(BorderEx)));
    }

我必须创建依赖属性，所以我可以更改一些点击事件的值

    public static readonly DependencyProperty ReloadProperty = DependencyProperty.Register("Reload", typeof (bool), typeof (BorderEx), new PropertyMetadata(default(bool), ReloadClicked));
    public bool Reload
    {
        get { return (bool) GetValue(ReloadProperty); }
        set { SetValue(ReloadProperty, value); }
    }

而且我可以在更改时触发的其他方法中处理它

    private static void ReloadClicked(DependencyObject o, DependencyPropertyChangedEventArgs e)
    {
        if (!((bool) e.NewValue)) return;
        var sender = (BorderEx) o;
        sender.RaiseEvent(new RoutedEventArgs(ReloadClickEvent));
    }

然后它只需要改变点击的值(value)

<ControlTemplate.Triggers>
    <Trigger SourceName="reloadButton" Property="IsPressed" Value="True">
        <Setter TargetName="reloadButton" Property="Background" Value="Green"/>
        <Setter Property="Reload" Value="True"/>
    </Trigger>
</ControlTemplate.Triggers>