将事件绑定到WPF中的UserControl

Question

如何从myWindow中的myUserControl传播PreviewKeyDown事件。

在myWindow.xaml

在myUserContorl.xaml

<ComboBox x:Name="combo" PreviewKeyDown="{Binding Path=MyEvent}" /> 

<local:MyFilter x:Name="check" MyEvent="submit" /> 

在myUserContorl.xaml.cs

#region MyEvent 

    /// <summary> 
    /// Gets or sets the Label which is displayed next to the field 
    /// </summary> 
    public EventHandler MyEvent 
    { 
     get { return (EventHandler)GetValue(EventHandlerProperty); } 
     set { SetValue(EventHandlerProperty, value); } 
    } 

    /// <summary> 
    /// Identified the Label dependency property 
    /// </summary> 
    public static readonly DependencyProperty EventHandlerProperty = 
     DependencyProperty.Register("MyEvent", typeof(EventHandler), 
      typeof(myUserControl), new PropertyMetadata("")); 

    #endregion 

这适用于只是 '字符串字段' 像内容或文字...但不适用于事件

Answer 1

只需添加（和删除）的事件处理程序到底层控制：

public event KeyEventHandler MyEvent 
{ 
    add { combo.AddHandler(PreviewKeyDownEvent, value); } 
    remove { combo.RemoveHandler(PreviewKeyDownEvent, value); } 
} 

而不XAML任何绑定：

<ComboBox x:Name="combo" />