WPF focus DataGrid during GotFocus event of another control 问题

Question

根据 Event for when KeyboardNavigation.TabNavigation Cycle occurs 的答案，首选解决方案是添加不可见控件作为 Detail 焦点范围的最后一个 TabIndex，处理此虚拟元素上的 GotFocus()。作为处理此 'event' 的一部分，我想将焦点移回主网格 MasterDG.Focus():

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="2*"/>
        <RowDefinition Height="1*"/>
    </Grid.RowDefinitions>
    <DataGrid Name="MasterDG" ItemsSource="{Binding Items}" FocusManager.IsFocusScope="True"/>
    <StackPanel Name="Detail" Grid.Row="1"  FocusManager.IsFocusScope="True">
        <TextBox/>
        <TextBox/>
        <TextBox/>
        <Control Name="DummyControl" 
                 GotFocus="DummyControl_GotFocus"/>
    </StackPanel>
</Grid>

事件处理程序

private void DummyControl_GotFocus(object sender, RoutedEventArgs e)
{
    Save(); //save when done editing last element of detail
    MasterDG.Focus();
}

然而，这不仅会导致 MasterDG 聚焦，还会 在当前单元格上进入编辑模式 并插入 \t 字符覆盖任何单元格内容。我该如何解决这个问题？
注意 Detail 的实际内容是动态生成的。

Answer 1

一个简单的解决方法是在下一个调度程序周期调用 Focus()：

private void DummyControl_GotFocus(object sender, RoutedEventArgs e)
{
    Save(); //save when done editing last element of detail
    Dispatcher.BeginInvoke(new Action(() => MasterDG.Focus()));
}

WPF focus DataGrid during GotFocus event of another control 问题

WPF focus DataGrid during GotFocus event of another control problem

c#

wpf

events

focus