WPF路由事件

demo 1:

using System.Windows;

namespace WpfApplication10
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            MyClass myClass = new MyClass() { Name = "111", Age = 12 };
            myClass.AddPrintEventHandler(this, new RoutedEventHandler(Print));
            myClass.AddPrintEventHandler(this, new RoutedEventHandler(Print2));
            this.RaiseEvent(new RoutedEventArgs(MyClass.OnPrintEvent, myClass));
        }

        public void Print(object o, RoutedEventArgs e)
        {
            MyClass m = e.OriginalSource as MyClass;
            MessageBox.Show(m.Name + System.Environment.NewLine + m.Age);
        }
        public void Print2(object o, RoutedEventArgs e)
        {
            MyClass m = e.OriginalSource as MyClass;
            MessageBox.Show(m.Name + "      " + m.Age);
        }
    }
}

using System.Windows;

namespace WpfApplication10
{
    class MyClass
    {
        public static readonly RoutedEvent OnPrintEvent = 
            EventManager.RegisterRoutedEvent("OnPrint", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(MyClass));

        public void AddPrintEventHandler(UIElement o, RoutedEventHandler h)
        {
            o.AddHandler(OnPrintEvent, h);
        }

        public void RemovePrintEventHandler(UIElement o, RoutedEventHandler h)
        {
            o.RemoveHandler(OnPrintEvent, h);
        }

        public int Age { get; set; }
        public string Name { get; set; }
    }
}

demo 2:

<UserControl x:Class="WpfControlLibrary1.UserControl1"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid Height="107" Width="148">
        <Button Content="Button" Height="23" Click="button1_Click" HorizontalAlignment="Left" Margin="37,38,0,0" Name="button1" VerticalAlignment="Top" Width="75"/>
    </Grid>
</UserControl>

using System.Windows;
using System.Windows.Controls;

namespace WpfControlLibrary1
{
    /// <summary>
    /// Interaction logic for UserControl1.xaml
    /// </summary>
    public partial class UserControl1 : UserControl
    {
        public static readonly RoutedEvent ButtonClickEvent = EventManager.RegisterRoutedEvent("ButtonClick", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(UserControl1));

        public event RoutedEventHandler ButtonClick
        {
            add { this.AddHandler(ButtonClickEvent, value); }
            remove { this.RemoveHandler(ButtonClickEvent, value); }
        }

        public UserControl1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            RoutedEventArgs routede = new RoutedEventArgs(ButtonClickEvent, this.button1); //设置button1为OriginalSource
            this.RaiseEvent(routede);
        }
    }
}

        <my:UserControl1 HorizontalAlignment="Left" Margin="126,71,0,0" Name="userControl11" VerticalAlignment="Top" ButtonClick="userControl11_ButtonClick" />
        <my:UserControl2 HorizontalAlignment="Left" Margin="293,71,0,0" Name="userControl21" VerticalAlignment="Top" Height="107" Width="165" />

        private void userControl11_ButtonClick(object sender, RoutedEventArgs e)
        {
            userControl21.textBox1.Text = string.Empty;
        }