问 如何影响WPF中键盘焦点遍历策略？

EN

我刚想明白了。 KeyboardNavigation.DirectionalNavigation 附加属性可以完成此任务。(可能的值列出了 这里

可将样本简化为：

<StackPanel KeyboardNavigation.DirectionalNavigation="Contained">
  <ListBox KeyboardNavigation.DirectionalNavigation="Continue">
    <ListBoxItem Content="Item 1" />
    <ListBoxItem Content="Item 2" />
    <ListBoxItem Content="Item 3" />
  </ListBox>
  <ListBox KeyboardNavigation.DirectionalNavigation="Continue">
    <ListBoxItem Content="Item A" />
    <ListBoxItem Content="Item B" />
    <ListBoxItem Content="Item C" />
  </ListBox>
</StackPanel>

因此，假设有两个ListViews：

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
    </Grid.RowDefinitions>
    <ListView x:Name="list1" KeyDown="list1_KeyDown">
        <ListViewItem Content="item 1"/>
        <ListViewItem Content="item 2"/>
        <ListViewItem Content="item 3"/>
    </ListView>
    <ListView x:Name="list2" Grid.Row="1" KeyDown="list2_KeyDown">
        <ListViewItem Content="item 1"/>
        <ListViewItem Content="item 2"/>
        <ListViewItem Content="item 3"/>
    </ListView>
</Grid>

为KeyDown事件添加两个处理程序：

private void list1_KeyDown(object sender, KeyEventArgs e) {
    switch (e.Key) {
        // check for down key
        case Key.Down:
            // if the bottom item is selected
            if (list1.SelectedIndex == list1.Items.Count - 1) {
                // select the next item
                list2.SelectedIndex = 0;
                (list2.Items[0] as UIElement).Focus();
                // make sure nothing else happens
                e.Handled = true;
            break;
private void list2_KeyDown(object sender, KeyEventArgs e) {
    switch (e.Key) {
        // check for up key
        case Key.Up:
            // if the top item is selected
            if (list2.SelectedIndex == 0) {
                // select the previous item
                int i = list1.Items.Count - 1;
                list1.SelectedIndex = i;
                (list1.Items[i] as UIElement).Focus();