禁用 Windows Phone 工具包中的 MenuItem

Question

我想禁用 contextMenu 中的一些菜单项，但不是全部。

 <tk:ContextMenuService.ContextMenu>
                            <tk:ContextMenu Name="optionMenu">

                                <tk:MenuItem Header="Move to Favorite" Name="moveToFav" Click="moveToFav_Click" />
                                <tk:MenuItem Header="Copy to Favorite" Name="copyToFav" Click="copyToFav_Click" />
                                <tk:MenuItem Header="Set as Folder Front" Name="setFront" Click="setFront_Click" />
                                <tk:MenuItem Header="Delete" Name="delete" Click="delete_Click" />
                            </tk:ContextMenu>
                        </tk:ContextMenuService.ContextMenu>

例如，我想禁用 moveToFav、copyToFav MenuItem，我尝试

moveToFav.isEnabled = false; copyToFav.isEnable = false;

但它不起作用，因为编译器说 moveToFav 在当前上下文中不存在。

有帮助吗？

Answer 1

执行以下操作

<tk:ContextMenuService.ContextMenu>
                            <tk:ContextMenu x:Name="optionMenu" >

                                <tk:MenuItem Header="Move to Favorite" x:Name="moveToFav" Click="moveToFav_Click" Loaded="moveToFav_Loaded" />
                                <tk:MenuItem Header="Copy to Favorite" Name="copyToFav" Click="copyToFav_Click" Loaded="copyToFav_Loaded" />
                                <tk:MenuItem Header="Set as Folder Front" Name="setFront" Click="setFront_Click" Loaded="setFront_Loaded" />
                                <tk:MenuItem Header="Delete" Name="delete" Click="delete_Click" />
                            </tk:ContextMenu>
                        </tk:ContextMenuService.ContextMenu>

好吧，我决定在代码中

private void moveToFav_Loaded(object sender, RoutedEventArgs e)
    {
        if (condition)
            (sender as MenuItem).IsEnabled = false;
    }

    private void copyToFav_Loaded(object sender, RoutedEventArgs e)
    {
        if (condition)
            (sender as MenuItem).IsEnabled = false;
    }

：它并不完美，但它有效