选择ListView项目后如何删除ListView选择

Question

Could we set a ListView to not retain a selection after a user click on a ListViewItem? Could it possibly been done?

Note: it is not about changing the style on 'IsSelected' but actually to not having the selection after the user click it.

I have try the following but it was not successful. In the View:

<ListView Grid.Row="1" 
          ItemsSource="{Binding Models}" 
          SelectedItem="{Binding SelectedModel}"
          DisplayMemberPath="DisplayContent"/>

In the ViewModel whom having the View DataContext:

public LookupItemWrapper SelectedModel
{
    get { return _selectionModel; }
    set
    {
        _selectionModel = value;

        OnPropertyChanged();

        if (value != null)
        {
            _eventAggregator.GetEvent<OnRequisitionSelectionInRequisitionProjectNavigationEvent>().Publish(   
                new OnRequisitionSelectionInRequisitionProjectNavigationEventArgs
                {
                    Requisitionid = _selectionModel.Id
                });
        }

        _selectionModel = null;

        OnPropertyChanged();
    }
}

I guess I know a way to imitate that by having ItemsControl with Button as its item. However I really like to know if I could do this with a ListView.

Update

I have written the following event handler wrt Clemens & Ed Plunkett suggestion. But where do I place the code? I should not place it inside the VM constructor as everytime SelectedModel is set to null, so does with this event handler logic.

SelectedModel.PropertyChanged += (s, e) =>
{
    if (SelectedModel != null)
    {
        ((ListView)s).SelectedItem = null;
    }
};

Update With Answer

I have try using ItemsControl. I write the ItemsControl's ItemTemplate which has a Button that bind with a command for mouse click.This work fine. I also write the ItemsControl's ItemTemplate which I intend to define the its style, however ItemContainerStyle can only has TargetType of ContentPresenter. Meaning I can't add Border, ScrollViewer, Grid or any other UI element inside the style. Sure, I can write it directly on the UserControl/MainWindow such as following:

<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
    <Border BorderBrush="Black" BorderThickness="10">
        <ItemsControl Grid.Column="0" 
                        ItemsSource="{Binding Friends}"
                        ItemContainerStyle="{StaticResource ItemContainerStyle}"
                        ItemTemplate="{StaticResource ItemTemplate}"/>
    </Border>
</ScrollViewer>

I found out ItemsControl is raw and not elegent.

So I come back to ListView. What I have done is:

1. I've defined style for the ListView which I add border, scrollviewer and ItemsPresenter (which represent the collection of ListViewItem).

2. Then I've defined style for ListViewItem which consist of a Button, command, style trigger.

3. Lastly, in the UserControl/MainWindow, I add the ListView.

4. I have set the ListView Style property to the defined ListView style and set its ItemContainerStyle property to the defined style of ListViewItem.

I do not set or use ListView SelectedItem property.

I response to user click not by monitoring to the property bind to the SelectedItem rather by handling the button command binding.

This is easier and much elegent.

<ListView Grid.Row="1" 
            ItemsSource="{Binding Models}" 
            ItemContainerStyle="{StaticResource RequisitionNavigationItemListViewItemStyle}" 
            Style="{StaticResource RequisitionNavigationListViewStyle}"/>

Here is both styles definition:

<Style x:Key="RequisitionNavigationItemListViewItemStyle" TargetType="{x:Type ListViewItem}">
    <Setter Property="Background" Value="{StaticResource ViewListBackgroundBrush}"/>
    <Setter Property="Foreground" Value="{StaticResource ViewListForegroundBrush}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListViewItem}">
                <Button Content="{Binding DisplayContent}"
                        Command="{Binding DataContext.OnSelectingRequisitionCommand, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"
                        CommandParameter="{Binding}">
                    <Button.Template>
                        <ControlTemplate TargetType="{x:Type Button}">
                            <Grid x:Name="grid">
                                <Border x:Name="BorderInButton" Background="{StaticResource RequisitionNavigationBackgroundBrush}"  Height="65" SnapsToDevicePixels="True">
                                    <ContentPresenter x:Name="ContentPresenterInButton" TextBlock.Foreground="{StaticResource RequisitionNavigationForegroundBrush}">
                                        <ContentPresenter.Resources>
                                            <Style TargetType="{x:Type TextBlock}">
                                                <Setter Property="TextWrapping" Value="Wrap"/>
                                                <Setter Property="FontSize" Value="12"/>
                                                <Setter Property="Margin" Value="10"/>
                                            </Style>
                                        </ContentPresenter.Resources>
                                    </ContentPresenter>
                                </Border>
                            </Grid>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter TargetName="BorderInButton" Property="Background" Value="{StaticResource RequisitionNavigationBackgroundHighlightedBrush}"/>
                                    <Setter TargetName="ContentPresenterInButton" Property="TextBlock.Foreground" Value="{StaticResource RequisitionNavigationForegroundHighlightedBrush}"/>
                                    <Setter Property="Cursor" Value="Hand"/>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Button.Template>
                </Button>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<Style x:Key="RequisitionNavigationListViewStyle" TargetType="{x:Type ListView}">
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListView}">
                <Border x:Name="Bd" BorderBrush="{StaticResource ViewListBorderBrush}" BorderThickness="2 1 4 4" Background="{StaticResource ViewListBackgroundBrush}" Padding="0" SnapsToDevicePixels="True">
                    <ScrollViewer Style="{StaticResource ScrollViewerStyle}">
                        <ItemsPresenter/>
                    </ScrollViewer>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Answer 1

Setting Focusable property to false in ListBoxItem style may help you:

<Style x:Key="{x:Type ListBoxItem}" TargetType="{x:Type ListBoxItem}">
  <Setter Property="Focusable" Value="False" />
</Style>