WPF：在窗口和用户控件中聚焦

Question

我正在尝试让 UserControl 正确地进行选项卡并感到困惑。逻辑树看起来像这样。

|-Window
  -Grid
    -TabControl
      -TabItem
        -StackPanel
          -MyUserControl
            |-StackPanel
              -GroupBox
                -Grid
                  -ComboBox
                    -Textbox1
                      -Textbox2

Everything works fine, except when the visibility converter for the ComboBox returns Visibility.Collapsed(don't allow user to change database mode), then when textbox1 is selected, instead of being able to tab through the controls in the UserControl, the focus shifts to a button在窗口底部声明。除了显示的控件之外，没有设置 TabIndex 或 FocusManager 属性。

我的头撞在砖墙上，我一定是遗漏了什么。我试过 IsFocusScope=True/False，用 FocusedElement 玩，如果 ComboBox 是不可见的 ( Visibility.Collapsed) ，没有任何效果。

<Window x:Class="MyNamespace.Client.WinInstaller"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    FocusManager.FocusedElement="{Binding ElementName=tabWizard}">
    <Window.Resources>
        <props:Settings x:Key="settings" />
    </Window.Resources>
    <Grid Grid.IsSharedSizeScope="True">
        <!-- row and column definitions omitted -->

        <loc:SmallHeader Grid.Row="0" x:Name="headerBranding" HeaderText="Setup" />
        <TabControl x:Name="tabWizard" DataContext="{StaticResource settings}" SelectedIndex="0" FocusManager.IsFocusScope="True">
            <TabItem x:Name="tbStart" Height="0">
                <StackPanel>
                    <TextBlock Text="Database Mode"/>
                    <loc:DatabaseSelector x:Name="dbSelector" AllowChangeMode="False" TabIndex="1"
                                          AvailableDatabaseModes="SQLServer" IsPortRequired="False"
                                          DatabaseMode="{Binding Default.DbMode,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                                          DatabasePath="{Binding Default.DatabasePath,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                </StackPanel>
            </TabItem>
        ...

用户控件的顶部如下：

<UserControl x:Class="MyNamespace.Client.DatabaseSelector"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Name="root"
    FocusManager.IsFocusScope="True"
    FocusManager.FocusedElement="{Binding ElementName=cboDbMode}">
    <UserControl.Resources>
        <conv:DatabaseModeIsFileBased x:Key="DatabaseModeIsFileBased"/>
        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
    </UserControl.Resources>
    <StackPanel DataContext="{Binding}">
        <GroupBox>
            <Grid>
                <!-- row and column definitions omitted -->
                <Label Content="Database Mode"/>
                <ComboBox x:Name="cboDbMode" SelectedValue="{Binding ElementName=root,Path=DatabaseMode,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                          DisplayMemberPath="Value" SelectedValuePath="Key" TabIndex="1" Visibility="{Binding AllowChangeMode,ElementName=root,Converter={StaticResource BooleanToVisibilityConverter}}" />
                   <!-- AllowChangeMode is a DependencyProperty on the UserControl -->
                <Grid><!-- row and column definitions omitted -->
                    <Label "Host"/>
                    <TextBox x:Name="txtDBHost" Text="{Binding ElementName=root,Path=DatabaseHost,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" TabIndex="2" />
                    <TextBox x:Name="txtDBPort" Text="{Binding ElementName=root,Path=DatabasePortString,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" TabIndex="3" />

Answer 1

我知道这个回复已经很晚了……但是您是否尝试过：

<UserControl ... KeyboardNavigation.TabNavigation="Local">

这样做将确保一旦您的 UserControl 获得焦点，您将仅通过 UserControl 中的 TabStop 导航（而不是担心整个应用程序中的 TabIndex 值冲突）。循环遍历 UserControl 的 TabStops 后，TabNavigation 将恢复到它外部的 TabStop。

http://msdn.microsoft.com/en-us/library/system.windows.input.keyboardnavigationmode.aspx