左键单击时的 WPF ContextMenu 仅显示但不让我单击

Question

我正在开发一个仅使用 Controls:Tiles 和属性 ContextMenu 的菜单栏，它只允许我单击鼠标右键打开它。经过一番搜索后，我使其可以用鼠标左键单击，但行为不同：当我按下右键单击时，ContextMenu 打开并且所有 MenuItems 都是可单击的。当我按下左键时，单击 ContextMenu 打开，但所有 MenuItems 看起来都已禁用，我无法单击它们。

我的代码在这里：

<Controls:Tile x:Name="FileTile" Width="Auto" Height="30" TitleFontSize="10" HorizontalContentAlignment="Left" 
                                       VerticalAlignment="Top" VerticalContentAlignment="Top" Background="White" HorizontalTitleAlignment="Right"
                                       Foreground="Gray" ContextMenuService.IsEnabled="True">
                    <Controls:Tile.Content>
                        <StackPanel Orientation="Horizontal" Height="Auto">
                            <Image Source="/images/topbaricons/files.png" Width="22" Height="22" VerticalAlignment="Center" HorizontalAlignment="Left"/>
                            <TextBlock Text="{x:Static p:Resources.File}" VerticalAlignment="Center" Margin="5,0,5,0" />
                        </StackPanel>
                    </Controls:Tile.Content>
                    <Controls:Tile.Style>
                        <Style TargetType="{x:Type Button}">
                            <Style.Triggers>
                                <EventTrigger RoutedEvent="Click">
                                    <EventTrigger.Actions>
                                        <BeginStoryboard>
                                            <Storyboard>
                                                <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="ContextMenu.IsOpen" FillBehavior="HoldEnd">
                                                    <DiscreteBooleanKeyFrame KeyTime="0:0:0" Value="True"/>
                                                </BooleanAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </BeginStoryboard>
                                    </EventTrigger.Actions>
                                </EventTrigger>
                            </Style.Triggers>
                        </Style>
                    </Controls:Tile.Style>
                    <Controls:Tile.ContextMenu>
                        <ContextMenu x:Name="File_ContextMenu" >
                            <MenuItem Header="{x:Static p:Resources.Menu_item_New}" Command="ApplicationCommands.New" IsEnabled="true">
                                <MenuItem.Icon>
                                    <Image Source="/images/topbaricons/new_file.png" Height="22" Width="22" />
                                </MenuItem.Icon>
                            </MenuItem>
                            <MenuItem Header="{x:Static p:Resources.Menu_item_Open}" Command="ApplicationCommands.Open" IsEnabled="true">
                                <MenuItem.Icon>
                                    <Image Source="/images/topbaricons/open_file.png" Height="22" Width="22" />
                                </MenuItem.Icon>
                            </MenuItem>
                            <MenuItem Header="{x:Static p:Resources.Menu_item_Save}" x:Name="MenuItemSave" Command="ApplicationCommands.Save" IsEnabled="False">
                                <MenuItem.Icon>
                                    <Image Source="/images/topbaricons/save.png" Height="22" Width="22" />
                                </MenuItem.Icon>
                            </MenuItem>
                            <MenuItem Command="ApplicationCommands.SaveAs" Visibility="Visible" >
                                <MenuItem.Icon>
                                    <Image Source="/images/topbaricons/save_as.png" Height="22" Width="22" />
                                </MenuItem.Icon>
                            </MenuItem>
                            <MenuItem Header="{x:Static p:Resources.Menu_item_Exit}" Command="ApplicationCommands.Close" IsEnabled="true">
                                <MenuItem.Icon>
                                    <Image Source="/images/topbaricons/off.png" Height="22" Width="22" />
                                </MenuItem.Icon>
                            </MenuItem>
                        </ContextMenu>
                    </Controls:Tile.ContextMenu>
                </Controls:Tile>

为了准确显示我一直在谈论的差异 post 有这张图片：

有人可以帮助我吗？我真的很想用左键单击，就像用右键单击一样。

谢谢。

Answer 1

我想命令的 CanExecute 将在某处处理（也许当前关注的元素有自己的实现）。正在粘贴

<ContextMenu.CommandBindings>
    <CommandBinding Command="ApplicationCommands.Open" CanExecute="CommandBinding_CanExecute" />
    <CommandBinding Command="ApplicationCommands.New" CanExecute="CommandBinding_CanExecute"/>
    <CommandBinding Command="ApplicationCommands.Save" CanExecute="CommandBinding_CanExecute"/>
    <CommandBinding Command="ApplicationCommands.SaveAs" CanExecute="CommandBinding_CanExecute"/>
    <CommandBinding Command="ApplicationCommands.Close" CanExecute="CommandBinding_CanExecute"/>
</ContextMenu.CommandBindings>

和

private void CommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
    e.CanExecute = true;
    //e.Handled = true;
}

应该可以解决问题。

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