wpf 处理事件

Question

我用一些按钮和事件编写了自己的控件 - 这就像一个魅力。然后我动态地把这个控件作为一个 child 放在 StackPanel 中。在其他类(class)。我如何在这个类中(使用 StackPanel )从我的自定义控件中获取事件 - 我的用户控件中有一个公共(public)事件 - 我如何从 StackPanel 处理它类(class)？

我正在尝试写类似的东西:

 public event EventHandler<ThumbnailEventArgs> ThumbnailClick
    {

        add { AddHandler(ThumbnailClickEventRouted, value); }

        remove { RemoveHandler(ThumbnailClickEventRouted, value); }

    }
    public static RoutedEvent ThumbnailClickEventRouted;

让我的 public ThumbnailClick路由但它不起作用。

Answer 1

您的路由事件应该会冒泡，所以只需在堆栈面板上捕获它。确保在注册路由事件时选择 RoutingStrategy.Bubble

主窗口

<StackPanel local:UserControl1.Tap="Grid_Tap" >
    <local:UserControl1 Width="120"></local:UserControl1>
</StackPanel>

用户控制

<Grid>
    <Button Click="Button_Click">Tap Me</Button>
</Grid>

后面的用户控制代码

public partial class UserControl1 : UserControl
{
    public UserControl1()
    {
        InitializeComponent();
    }

    // Create a custom routed event by first registering a RoutedEventID
    // This event uses the bubbling routing strategy
    public static readonly RoutedEvent TapEvent = EventManager.RegisterRoutedEvent(
        "Tap", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(UserControl1));

    // Provide CLR accessors for the event
    public event RoutedEventHandler Tap
    {
        add { AddHandler(TapEvent, value); }
        remove { RemoveHandler(TapEvent, value); }
    }

    // This method raises the Tap event
    void RaiseTapEvent()
    {
        RoutedEventArgs newEventArgs = new RoutedEventArgs(UserControl1.TapEvent);
        RaiseEvent(newEventArgs);
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        RaiseTapEvent();
    }
}

UserControl1 中的一些代码来自 Microsoft 文档...