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路由事件初級案例

前端:

    <Grid Name="gridRoot" Background="Green">
        <Grid Name="gridA" Margin="10" Background="LightBlue">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Button Height="50" Width="100" Name="btn1" Content="Left" Grid.Column="0" />
            <Button Height="50" Width="100" Name="btn2" Content="Right" Grid.Column="1"/>
        </Grid>
    </Grid>

後臺:
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            this.gridRoot.AddHandler(Button.ClickEvent, new RoutedEventHandler(MyHandler));
            this.gridA.AddHandler(Button.ClickEvent, new RoutedEventHandler(MyHandler2));

            this.gridA.AddHandler(Button.MouseEnterEvent, new RoutedEventHandler(gridA_MouseEnter));
        }

        public void MyHandler(object a, RoutedEventArgs e)
        {
            MessageBox.Show((e.OriginalSource as FrameworkElement).Name);
        }

        public void MyHandler2(object a, RoutedEventArgs e)
        {
            if (e.OriginalSource == btn1)
            {
                MessageBox.Show("the left button is off.");
                e.Handled = true;
            }
        }

        private void gridA_MouseEnter(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource == btn2)
            {
                MessageBox.Show("btn2 mouse enter.");
            }
            else
            {
                MessageBox.Show("btn1 mouse enter.");
            }
        }
    }