使用 MVVM 动态添加时给予 TabItem 焦点 [英] Give a TabItem Focus when Dynamically Adding Using MVVM

问题描述

全部，我正在使用 MVVM 动态地将 TabItem 添加到 TabControl.新的 TabItems 加载良好，但我希望添加的选项卡自动获得焦点.也就是说，我添加了一个选项卡，但我不想必须单击该选项卡才能获得焦点.

All, I am adding a TabItem to a TabControl dynamically using MVVM. The new TabItems load fine, but I want the added tab to gain focus automatically. That is, I add a tab and I do not want to have to click on that tab to give it focus.

TabControl 的 XAML 看起来像

The XAML for the TabControl look like

<TabControl ItemsSource="{Binding Path=Workspaces}" 
            IsSynchronizedWithCurrentItem="True" 
            HorizontalContentAlignment="Stretch" 
            VerticalContentAlignment="Stretch"
            HorizontalAlignment="Stretch" 
            VerticalAlignment="Stretch" 
            TabStripPlacement="Top">
<TabControl.ItemContainerStyle>
   <Style TargetType="TabItem">
      <Setter Property="Header" Value="{Binding Path=DisplayName}"/>
      <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
      <Setter Property="VerticalContentAlignment" Value="Stretch"/>
   </Style>
</TabControl.ItemContainerStyle>
<TabControl.ContentTemplate>
   <DataTemplate>
      <views:ResourceControl DataContext="{Binding}" 
                             HorizontalAlignment="Stretch" 
                             VerticalAlignment="Stretch"/>
   </DataTemplate>
</TabControl.ContentTemplate>
</TabControl>

我认为(基于这里的一些答案)，IsSynchronizedWithCurrentItem="True" 会为我解决这个问题，但这不起作用.

I thought (based upon some answers here), that IsSynchronizedWithCurrentItem="True" would solve this for me, but this is not working.

如何自动选择添加的TabItem?

感谢您的时间.

推荐答案

您可以将 selectedIndex 绑定到视图模型上的属性

You can bind the selectedIndex to a property on your viewmodel

SelectedIndex="{Binding SelectedTabIndex}" >

或使用

SelectedItem="{Binding SelectedWorkSpace}"

在您的 ViewModel 中，当您向 Workspaces 添加新的 Workspace 时，请适当设置 SelectedTabIndex/SelectedWorkSpace.

In your ViewModel, when you add a new Workspace to Workspaces, set the SelectedTabIndex/SelectedWorkSpace appropriately.

后者使您可以访问您可能需要的当前工作区.

The later gives you access to the current workspace which you will probably need anyway.

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