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我在列表框中有列表框项，这些列表框项是从可观察的集合中动态填充的，我正在尝试使用交互触发器来触发列表框项的“已选择”事件来启动操作，以便我可以绑定到即将到来的项目来自可观察的集合。

我遇到的问题是我似乎可以使用事件触发器访问“选定”事件。

这是代码：

        <ListBox x:Name="AssocitedLayerListControl" Background="Transparent" BorderBrush="Transparent" ItemContainerStyle="{StaticResource ListBoxItemStyle}"
                ScrollViewer.VerticalScrollBarVisibility="Hidden" ScrollViewer.HorizontalScrollBarVisibility="Auto" 
                VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="10,0,10,0" Padding="0" Height="25" Width="Auto" >

            <!-- Attribute Table Item Template-->
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <ContentControl>
                        <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0">
                            <TextBlock Text="{Binding Path=Key}"
                                    Foreground="#FFFFFFFF"
                                    FontSize="10" LineHeight="20"  
                                    HorizontalAlignment="Left" VerticalAlignment="Center"
                                    Margin="5,0,5,0" Padding="0" />
                            <Button BorderBrush="#FFFFFFFF" BorderThickness="1" Background="#FF000000"
                                HorizontalAlignment="Left" VerticalAlignment="Top"
                                Padding="1" Margin="0,1,0,1" Style="{StaticResource CloseItemStyle}">
                                <i:Interaction.Triggers>
                                    <i:EventTrigger EventName="Click">
                                        <actions:RemoveLayer LayerName="{Binding Path=Key}" TargetGraphicsLayer="{Binding Path=Value}" />
                                    </i:EventTrigger>
                                </i:Interaction.Triggers>
                            </Button>
                        </StackPanel>
                        <i:Interaction.Triggers>
                            <i:EventTrigger EventName="Selected" SourceObject="{Binding RelativeSource={RelativeSource Mode=TemplatedParent, AncestorType=ListBoxItem}}">
                                <actions:SetGraphicLayerInGrid LayerName="{Binding Path=Key}" TargetGraphicsLayer="{Binding Path=Value}" />
                            </i:EventTrigger>
                        </i:Interaction.Triggers>
                    </ContentControl>
                </DataTemplate>
            </ListBox.ItemTemplate>

            <ListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Orientation="Horizontal"/>
                </ItemsPanelTemplate>
            </ListBox.ItemsPanel>

        </ListBox>
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1 回答 1

2

尝试使用DataTriggerIsSelected监听ListBoxItem 的属性：

xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
...
<i:Interaction.Triggers>
    <ei:DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource FindAncestor, AncestorType=ListBoxItem}}" Value="True">
        <actions:SetGraphicLayerInGrid LayerName="{Binding Path=Key}" TargetGraphicsLayer="{Binding Path=Value}" />
    </ei:DataTrigger>
</i:Interaction.Triggers>
于 2013-05-17T14:44:59.000 回答