切换到 TabItem 时获得焦点

Question

我有 window，TabControl 和四个 TabItem。 And I need to change focus to right textBox when tab is selected.这里有一些正确的方法吗？我尝试使用 TabControl_SelectionChanged 事件，但它似乎不起作用。

 private void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
 {
     if (((TabItem)((TabControl)sender).SelectedItem).Name == "tab2")
     {
         UpdateLayout();
         textBox2EAN.Focus();
     }
     e.Handled = true;
 }

但是如果我点击 tab2，焦点就会出现在 DataGrids 的复选框列上。

选项卡项：...

<TabItem Name="tab2" Header="2" Width="50">
  <Grid>    
      <DataGrid Name="dataGrid" Margin="1" Grid.Column="0" Grid.Row="0" Grid.ColumnSpan="3"
                VerticalAlignment="Stretch" HorizontalAlignment="Stretch" MouseDoubleClick="dataGrid_MouseDoubleClick"
                ItemsSource="{Binding RadkyDokladu.radky}" CanUserSortColumns="False" PreviewKeyDown="dataGrid_PreviewKeyDown"
                AutoGenerateColumns="False" IsReadOnly="True" FontSize="12" SelectionMode="Single" >
          <DataGrid.Columns>
              <DataGridCheckBoxColumn Header="" Binding="{Binding ZASKRTNUTO}" Width="auto" />
              <DataGridTextColumn Header="Náz" Binding="{Binding Artikl_NAME}" Width="*"/>
          </DataGrid.Columns>
      </DataGrid>
      <TextBox Name="textBox2EAN" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2" Margin="1" 
               VerticalContentAlignment="Center" />
  </Grid>
</Tabitem>

Answer 1

您可以将其移动到 XAML 并让 TabItem 内的控件在准备就绪时移动焦点：

<TabItem Name="tab2" Header="2" Width="50">
    <Grid FocusManager.FocusedElement="{Binding ElementName=textBox2EAN}">
       <DataGrid />
       <TextBox Name="textBox2EAN" />
   </Grid>
</TabItem>

切换到 TabItem 时获得焦点

Focus when change to TabItem

c#

wpf

focus