处理隧道自定义路由事件 [英] Handle tunneled custom routed event

问题描述

目前，我正在用C＃WPF自定义路由事件我被困在一个问题进行试验。
这是我想做的事情：我想火从我的主窗口，它通过的StackPanel由Button类派生的自定义控制隧道自定义路由事件。然后自定义控制处理路由事件。

我的问题是，当我火的处理程序从未被称为事件

我的代码：

 公共部分类主窗口：窗口
 {
 
公共静态只读RoutedEvent MyRoutedEvent = EventManager.RegisterRoutedEvent （MyRoutedEvent，RoutingStrategy.Tunnel的typeof（RoutedEventHandler），typeof运算（的UIElement））; 
 
公共静态无效AddMyRoutedEventHandler（DependencyObject的D，RoutedEventHandler处理）
 {
的UIElement UIE = D作为的UIElement; 
如果（UIE！= NULL）
 {
 uie.AddHandler（MainWindow.MyRoutedEvent，处理程序）; 
} 
} 
 
公共静态无效RemoveMyRoutedEventHandler（DependencyObject的D，RoutedEventHandler处理）
 {
的UIElement UIE = D作为的UIElement; 
如果（UIE！= NULL）
 {
 uie.RemoveHandler（MainWindow.MyRoutedEvent，处理程序）; 
} 
} 
 
 
公共主窗口（）
 {
的InitializeComponent（）; 
} 
 
私人无效keyClassButton1_MyRoutedEvent（对象发件人，RoutedEventArgs E）
 {
 Console.Write（\\\
MyRoutedEvent！）; 
} 
 
私人无效Window_MouseDown（对象发件人，MouseButtonEventArgs E）
 {
 RoutedEventArgs newEventArgs =新RoutedEventArgs（MyRoutedEvent，这一点）; 
的RaiseEvent（newEventArgs）; 
} 
} 
  

XAML代码：

 <窗口x：类=RoutedEvent_Test.MainWindow
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml /演示
的xmlns：X =http://schemas.microsoft.com/winfx/2006/xaml
的xmlns：地方=CLR的命名空间：RoutedEvent_Test
标题=主窗口HEIGHT =350WIDTH =525的MouseDown =Window_MouseDown> 
<网格和GT; 
< StackPanel的名称=stackPanel1> 
<局部：KeyClass X：NAME =keyClass1CONTENT =键类按钮HEIGHT =30地方：MainWindow.MyRoutedEvent =keyClassButton1_MyRoutedEvent>< /地方：KeyClass> 
< / StackPanel的> 
< /网格和GT; 
< /窗GT; 
  

解决方案

好吧，我想通了由自己：
虽然我喜欢一千倍阅读它显然在MSDN说明指出：

隧道：首先，事件处理程序的元素树根是
调用。 路由事件，然后穿过连续
子沿线要素的路线，朝着那就是
路由事件源（的，所提出的路由元素节点元素事件）。
[...]

我的一个隧道路由事件的第一个想法是：我火从主窗口事件它穿过的StackPanel到按钮元素。
而是：
你有自已的按钮启动它 - 那么它开始在根元素（主窗口），并经过控制层的按钮元件，它。解雇摆在首位的事件

我所做的就是：我从主窗口激活事件，因此不能去别的

$ b的任何地方$ b

I'm currently experimenting with C# WPF custom routed events i got stuck at a problem. This is what i want to do: I want to fire a custom routed event from my main window which tunnels through a stackpanel to a custom control derived by the Button class. The custom control then handles the routed event.

My problem is when i fire the event the handler is never been called.

My code:

    public partial class MainWindow : Window
        {

        public static readonly RoutedEvent MyRoutedEvent = EventManager.RegisterRoutedEvent("MyRoutedEvent", RoutingStrategy.Tunnel, typeof(RoutedEventHandler), typeof(UIElement));

        public static void AddMyRoutedEventHandler(DependencyObject d, RoutedEventHandler handler)
        {
            UIElement uie = d as UIElement;
            if (uie != null)
            {
                uie.AddHandler(MainWindow.MyRoutedEvent, handler);
            }
        }

        public static void RemoveMyRoutedEventHandler(DependencyObject d, RoutedEventHandler handler)
        {
            UIElement uie = d as UIElement;
            if (uie != null)
            {
                uie.RemoveHandler(MainWindow.MyRoutedEvent, handler);
            }
        }


        public MainWindow()
        {
            InitializeComponent();
        }

        private void keyClassButton1_MyRoutedEvent(object sender, RoutedEventArgs e)
        {
            Console.Write("\nMyRoutedEvent!");
        }

        private void Window_MouseDown(object sender, MouseButtonEventArgs e)
        {
            RoutedEventArgs newEventArgs = new RoutedEventArgs(MyRoutedEvent, this);
            RaiseEvent(newEventArgs);
        }
    }

XAML code:

<Window x:Class="RoutedEvent_Test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:RoutedEvent_Test"
        Title="MainWindow" Height="350" Width="525" MouseDown="Window_MouseDown">
    <Grid>
        <StackPanel Name="stackPanel1">
            <local:KeyClass x:Name="keyClass1" Content="key class button" Height="30" local:MainWindow.MyRoutedEvent="keyClassButton1_MyRoutedEvent"></local:KeyClass>
        </StackPanel>
    </Grid>
</Window>

解决方案

ok i figured it out by myself: Although i've read it like a thousand times it clearly states in the MSDN description:

Tunneling: Initially, event handlers at the element tree root are invoked. The routed event then travels a route through successive child elements along the route, towards the node element that is the routed event source (the element that raised the routed event). [...]

My first idea of a tunneled routed event was: I fire a event from the main window and it goes through the stackpanel to the button element. BUT INSTEAD: You have to fire it from the button already - then it begins at the root element (main window) and goes through the control layers to the button element which fired the event in the first place.

What i did was: I fired the event from the main window so it couldn't go anywhere else

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