How to update ListViewItem.SelectedItem whenever the ListView child control gets focus?

Question

How to udpate the ListView.SelectedItem when a child control within the ListView gets focus?

<ListView ItemsSource="{Binding Path=Records, Mode=TwoWay}" IsSynchronizedWithCurrentItem="True">
     <ListView.SelectedItem>
          <Binding Path="SelectedRecord" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged"/>
     </ListView.SelectedItem>
     <ListView.ItemContainerStyle>
          <Style TargetType="{x:Type ListViewItem}">
               <Style.Triggers>
                   <Trigger Property="IsKeyboardFocusWithin" Value="True">
                         <Setter Property="IsSelected" Value="True"/>
                   </Trigger>
               </Style.Triggers>
          </Style>
     </ListView.ItemContainerStyle>
     <ListView.Resources>
          <DataTemplate DataType="x:Type ListViewItem">
               <ListViewItem IsSelected="{Binding IsKeyboardFocusWithin"/>
          </DataTemplate>
     </ListView.Resources>
     <ListView.View>
          <GridView>
              <GridViewColumn>
              <TextBox ... Tag="{Binding}".../>
              </GridViewColumn>
              <GridViewColumn>
              <TextBox ... Tag="{Binding}".../>
              </GridViewColumn>
          </GridView>
     </ListView.View>
</ListView>

The ListView has rows of child controls within the GridView columns. I want to update the bound property of the ListView.SelectedItem when any of the child control in any row has the keyboard focus. It will be great if this could be entirely done within the .xaml file without having to resort to the code-behind.

Answer 1

Change the SelectionMode of your ListBox to Single

Your current code works if you don't set the default SelectedItem, however if you set the default SelectedItem then it doesn't automatically unselect it when you click on a 2nd item, so SelectedItem stays bound to the default selected item until you give that row focus and remove it again.

You can also simplify your XAML a bit. You don't need the DataTemplate in your ListBoxItem.Resources and you can set the SelectedItem in your <ListBox> tag directly

<ListView ItemsSource="{Binding Path=Records}" IsSynchronizedWithCurrentItem="True"
          SelectedItem="{Binding SelectedRecord}" SelectionMode="Single">

     <ListView.ItemContainerStyle>
          <Style TargetType="{x:Type ListViewItem}">
               <Style.Triggers>
                   <Trigger Property="IsKeyboardFocusWithin" Value="True">
                         <Setter Property="IsSelected" Value="True"/>
                   </Trigger>
               </Style.Triggers>
          </Style>
     </ListView.ItemContainerStyle>

     <ListView.View>
          <GridView>
              <GridViewColumn>
              <TextBox ... Tag="{Binding}".../>
              </GridViewColumn>
              <GridViewColumn>
              <TextBox ... Tag="{Binding}".../>
              </GridViewColumn>
          </GridView>
     </ListView.View>
</ListView>