ListBox CurrentItem / SelectedItem

Question

I'm using a custom ListBoxItem, that's built like this

<Style x:Key="MyListBoxItem"  TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <Border>
                    <Border>
                        <ContentPresenter />
                    </Border>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

It's a basic structure which is modified for the editing control that I need, like this

<Style x:Key="MyListBoxItemText"  TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <ListBoxItem Style="{DynamicResource MyListBoxItem}">
                    <TextBox  />
                </ListBoxItem>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

The used ListBoxItem for a certain record of the used ItemsSource of the ListBox is chosen by a StyleSelector.

What I need is a possibility to access the ListBoxItem, thats currently focused. I've tried the following

set the IsSyncronizedWithCurrentItem-property of the ListBox to true
try to grab the SelectionChanged Event of the ListBox
monitor the IsSelected property of the ListBoxItem
define (Multi)Trigger in the basic style for the ListBoxItem
set an EventSetter

Can anyone help me, please?

Thanks a lot in advance

Can you show us how you tried using Trigger? I would use the DataTrigger and the IsSelected property. — XAMlMAX
Well, not really, sorry. The reason is that I was trying to bind/link to a EventHandler in the ViewModel, which didn't work at all. But is it possibl to see, what your solution would look like? — Joe M. Doe
How do you expect us to help without code examples? Surely you can skip whatever sensitive information you want to keep private, it's about reproducing your attempt and then finding the right way. — XAMlMAX

Joe M. Doe Joe M. Doe · Accepted Answer · 2018-01-03T11:05:44

Alright, here are my attempts:

<ControlTemplate.Triggers>
    <DataTrigger  Binding="{Binding Selector.IsSelected}" Value="True">
        <Setter Property="Background" Value="Salmon" />
    </DataTrigger>
</ControlTemplate.Triggers>


<ControlTemplate.Triggers>
    <DataTrigger  Binding="{Binding ListBoxItem.IsSelected}" Value="True">
        <Setter Property="Background" Value="Salmon" />
    </DataTrigger>
</ControlTemplate.Triggers>


<ControlTemplate.Triggers>
    <DataTrigger  Binding="{Binding IsSelected}" Value="True">
        <Setter Property="Background" Value="Salmon" />
    </DataTrigger>
</ControlTemplate.Triggers>

In the style of the ListBox the IsSyncronizedWithCurrentItem property is set to true.

ListBox CurrentItem / SelectedItem

1 Answers