Change listbox template on lost focus event in WPF

I want to present a listbox with TextBlocks as items. When the user clicks/selects an item it changes into a TextBox for editing. As soon as the controls loses focus the item would turn back to a TextBlock.

The following XAML is almost working in that the TextBlock does turn into a TextBox when it's selected. It also turns back to a TextBlock if I select another item on the list. The problem is that if I move out of the listbox (in this case to the Add New text box) the list item stays as a TextBox.

The question ( WPF ListViewItem lost focus event - How to get at the event? ) looked promising but I can't make it work. I tried using the IsFocused property but then I wasn't able to edit the textbox because when I got into the textbox the listboxitem would go out of focus and thus turning back to a TextBlock before I had a chance to edit the text.

How can I make the TextBox turn back to TextBlock if the listbox/item loses the focus?

(Any other implementation that accomplishes the goal are also welcomed)

<Window x:Class="MyView.MainWindow1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
        Title="MainWindow1" Height="300" Width="200">
    <Window.Resources>
        <DataTemplate x:Key="ItemTemplate">
            <TextBlock Text="{Binding Name}" />
        </DataTemplate>

        <DataTemplate x:Key="SelectedTemplate">
            <TextBox Text="{Binding Name, Mode=TwoWay}" />
        </DataTemplate>

        <Style TargetType="{x:Type ListBoxItem}" x:Key="ContainerStyle">
            <Setter Property="ContentTemplate" Value="{StaticResource ItemTemplate}" />
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True">
                    <Setter Property="ContentTemplate" Value="{StaticResource SelectedTemplate}" />
                </Trigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>

    <StackPanel >
        <ListBox ItemsSource="{Binding Departments}" HorizontalContentAlignment="Stretch"
                 ItemContainerStyle="{StaticResource ContainerStyle}" />
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <TextBox  Text="{Binding NewDepartmentName, Mode=TwoWay}"  />
            <Button Grid.Column="1" Width="50" Content="Add" Command="{Binding Path=AddNewDepartmentCommand}" />
        </Grid>
    </StackPanel>
</Window>

---

这不能回答你的问题，但通过在未选择listboxitem时将文本框设置为文本块，提供了一种替代解决方案：

<Page.Resources>
    <ResourceDictionary>
        <Style x:Key="ListBoxSelectableTextBox" TargetType="{x:Type TextBox}">
            <Setter Property="IsHitTestVisible" Value="False" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListBoxItem}, AncestorLevel=1}}" Value="True">
                    <Setter Property="IsHitTestVisible" Value="True" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ResourceDictionary>
</Page.Resources>
<Grid>
    <ListBox ItemsSource="{Binding Departments}" HorizontalContentAlignment="Stretch">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <TextBox Margin="5" Style="{StaticResource ListBoxSelectableTextBox}" Text="{Binding Name}" BorderBrush="{x:Null}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Grid>

---

There are many ways you can do this:

Above answer

Create a TextBox style based on TextBoxBase such that when disabled, it makes the TextBox look like a TextBlock by setting the BorderThickness="0", Background="transparent"

Have both TextBlock and TextBox on each ListViewItem and using the above answer technique hide and show the TextBlock/TextBox accrodingly

链接地址: http://www.djcxy.com/p/59894.html

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