我无法使自定义点击事件正常工作。

Question

我写了这个类。

public class MyButtonSimple : Button
{
    // 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(MyButtonSimple));

    // 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(MyButtonSimple.TapEvent);
        RaiseEvent(newEventArgs);
    }
    // For demonstration purposes we raise the event when the MyButtonSimple is clicked
    protected override void OnClick()
    {
        RaiseTapEvent();
    }

它工作正常，我单击它，它显示一个 MessageBox。 问题是我想将它派生的类更改为“UserControl”。 而且我不希望它源自 Button。但是，当我 更改它并尝试单击它时，它不起作用，没有任何反应。

Note：此问题总结整理于:I can't get my custom click event to work.

Answer 1

OnClick 不属于 UserControl 方法，您可以根据需要覆盖任何 UserControl 方法。在我的测试中，我重写了 Method 以引发 UserControl 的 RaiseTapEvent，下面是我编辑的OnMouseLeftButtonDownMyButtonSimple.cs

 public class MyButtonSimple:UserControl  
    {  
        // 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(MyButtonSimple));  
  
        // 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(MyButtonSimple.TapEvent);  
            RaiseEvent(newEventArgs);  
        }  
        // For demonstration purposes we raise the event when the MyButtonSimple is clicked  
  
        protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)  
        {  
            RaiseTapEvent();  
        }  
    }  

若要在 MainWindow.xaml 中使用它，请执行以下操作：

  <local:MyButtonSimple Width="180" Height="30" Background="Aqua" Tap="MyButtonSample_Tab" ></local:MyButtonSimple>  

MainWindow.xaml.cs代码为：

 private void MyButtonSample_Tab(object sender, RoutedEventArgs e)  
        {  
            MessageBox.Show("This is MyButtonSimple:UserControl.");  
        }  

当我单击MyButtonSimple时，结果图片为：

这是我对你的问题的理解，如果我误解了，请详细指出并描述你的问题，这对我分析是有益的。

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