将单击事件附加到 ListBoxItem 内的按钮的上下文菜单项

Question

我正在尝试创建一个像 chrome 一样的下载栏。

我目前遇到的问题是尝试将单击事件绑定到列表框项中按钮的上下文菜单。单击上下文菜单项时，它表示未找到该操作。

<ControlTemplate TargetType="{x:Type ListBoxItem}">
    <Button BorderBrush="Transparent" BorderThickness="0" telerik:StyleManager.Theme="Windows8" Click="ButtonBase_OnClick">
        <StackPanel Name="Panel" SnapsToDevicePixels="True" 
                Orientation="Horizontal" Margin="1 0"
                Height="30">

            <ContentControl Margin="0 0 10 0" Height="20">
                <ContentControl.Style>
                    <Style TargetType="ContentControl">
                        <Setter Property="ContentTemplate" Value="{StaticResource Icons.File}"></Setter>                            
                    </Style>
                </ContentControl.Style>
            </ContentControl>

            <TextBlock Foreground="Black" Text="{Binding FileName}"  
                    VerticalAlignment="Center" 
                    TextAlignment="Center"
                    Margin="1 0 0 0"/>

            <Button x:Name="ExpandButton" Background="Transparent" Click="ExpandButton_OnClick" BorderThickness="0" VerticalAlignment="Center" ContextMenuService.IsEnabled="false">
                <Button.ContextMenu>
                    <ContextMenu x:Name="popup">
                        <MenuItem  Header="Open" cal:Message.Attach="[Click] = [Open($this)]"></MenuItem>
                    </ContextMenu>
                </Button.ContextMenu>
                <ContentControl ContentTemplate="{StaticResource Icons.ArrowUp}" Width="10" Height="10" Margin="2" VerticalAlignment="Center"/>
            </Button>
            <Rectangle Width="2" Fill="Gray" Margin="0 0 0 0"/>
        </StackPanel>
    </Button>
</ControlTemplate>

我可以将它绑定在应用程序的 code(xaml.cs) 端，但我也忘记了上下文应该指向的项目。为此，我将 caliburn 的 click 事件替换为常规的 Click 事件。 SelectedItem 和 SelectedItems 分别为 null 或空。

private void MenuItem_OnClick(object sender, RoutedEventArgs e)
{
    var originalSource = e.OriginalSource;
    var selectedItem = FileListBox.SelectedItem;
    var SelectedItems = FileListBox.SelectedItems;
}

Answer 1

尚未测试，但类似的内容应该通过右键或左键打开上下文菜单：

<Button x:Name="ExpandButton" Background="Transparent" Click="ContextMenu_Click" BorderThickness="0" VerticalAlignment="Center" ContextMenuService.IsEnabled="false">
    <Button.Style>
        <Style TargetType="{x:Type Button}">
            <Style.Triggers>
                <EventTrigger RoutedEvent="Click">
                    <EventTrigger.Actions>
                        <BeginStoryboard>
                            <Storyboard>
                                <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="ContextMenu.IsOpen">
                                    <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="True"/>
                                </BooleanAnimationUsingKeyFrames>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger.Actions>
                </EventTrigger>
            </Style.Triggers>
            <Setter Property="ContextMenu">
                <Setter.Value>
                    <ContextMenu x:Name="popup" MenuItem.Click="menuItem_Click">
                        <MenuItem  Header="Open" cal:Message.Attach="[Click] = [Open($this)]"></MenuItem>
                    </ContextMenu>
                </Setter.Value>
            </Setter>
        </Style>
    </Button.Style>
    <ContentControl ContentTemplate="{StaticResource Icons.ArrowUp}" Width="10" Height="10" Margin="2" VerticalAlignment="Center"/>
</Button>

至于代码隐藏，在我上次的拔河中遇到了类似的问题，以下内容对我有用：

DependencyObject mainDep = new DependencyObject();

private void ContextMenu_Click(object sender, RoutedEventArgs e)
{
    DependencyObject dep = (DependencyObject)e.OriginalSource;

    while ((dep != null) && !(dep is ListBoxItem))
    {
        dep = VisualTreeHelper.GetParent(dep);
    }
    mainDep = dep;
}
private void menuItem_Click(object sender, RoutedEventArgs e)
{
    DependencyObject dep = mainDep;

    if (dep is ListBoxItem)
    {
        ...
           DO your stuff here
        ...
    }
}

让我知道这些对你有什么作用