How to set a property of a different control from a style setter

Question

I have a ListView and inside this another ListView. Whenever I select an item in a child ListView I want the parent of that to be selected in the parent ListView. Example:

<Window>
    <Window.Resources>
        <!-- Parent ListView ItemsTemplate... Incomplete -->
        <DataTemplate x:Key="parentItemTemplate">
            <!-- Child ListView -->
            <ListView SelectedItem="{Binding ChildSelectedItem}" ItemsSource="{Binding WhateverInParent}">
                <ListView.Resources>
                    <Style TargetType="ListViewItem">
                        <Trigger Property="IsSelected" Value="True">
                            <!-- This is what I want to do, but ofc this doesn't work because it produces a compile error saying can't set TargetName in a setter -->
                            <Setter TargetName="parent" Property="SelectedValue" Value="{Binding DataContext, RelativeSource={RelativeSource AncestorType=ListView}}" />
                        </Trigger>
                    </Style>
                </ListView.Resources>
            </ListView>
        </DataTemplate>
    </Window.Resources>
    <ListView ItemsTemplate="{StaticResource parentItemTemplate}" x:Name="parent" SelectedItem="{Binding ParentSelectedItem}" ItemsSource="{Binding Whatever}"/>
</Window>

How do I get this done? Would prefer it to be in XAML.

cannot do via style..but why do you want to do this? and ListView does not have IsSelected property. What do you want to achieve? — Nitin, Sep 04 '14 at 02:52

score 2 · Accepted Answer · answered Sep 04 '14 at 03:37

You just need to set the ListViewItem.ItemContainerStyle like below to achieve what you want

<ListView ItemsTemplate="{StaticResource parentItemTemplate}" x:Name="parent" SelectedItem="{Binding ParentSelectedItem}" ItemsSource="{Binding Whatever}">
   <ListView.ItemContainerStyle>
      <Style TargetType="ListViewItem">
         <Style.Triggers>
             <Trigger Property="IsKeyboardFocusWithin" Value="true">
               <Setter Property="IsSelected" Value="true" />
             </Trigger>
         </Style.Triggers>
      </Style>
    </ListView.ItemContainerStyle>
</ListView>

+1, Looks good. The only problem is when I click outside the parent ListView, the current selection gets deselected. — nakiya, Sep 04 '14 at 04:24

score 0 · Answer 2 · edited May 23 '17 at 10:26

0

You could simply use the InnerControl class to achieve this.

References:

WPF Nested ListViews - selectedValue of parent ListView

Or else you can go for RelativeSource:

How to access controls parent's property in a style

Hope it helps!

edited May 23 '17 at 10:26

Community

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answered Sep 04 '14 at 02:58

Kulasangar

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How to set a property of a different control from a style setter

2 Answers2