mahapps:The 可附加 属性 'Flyouts' 未在类型 'MetroWindow' 中找到

Question

我是 wpf 的新手。我想在 windows8 中有一个类似应用程序（右侧）window 的弹出窗口 window。使用 nuget 将 mahapps(http://mahapps.com) 添加到我的项目并向应用程序添加资源但是当向 window 添加弹出窗口时我收到此错误：

    The attachable property 'Flyouts' was not found in type 'MetroWindow'

我的xaml代码是：

    <controls:MetroWindow x:Class="WpfApplication3.MainWindow"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
                  Title="MainWindow"
                  Height="600"
                  Width="800" WindowState="Maximized">
<Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Colors.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/Blue.xaml" />
            <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Accents/BaseLight.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Window.Resources>

<Controls:MetroWindow.Flyouts>
    <Controls:FlyoutsControl>
        <Controls:Flyout Header="Flyout" Position="Right" Width="200">

        </Controls:Flyout>
    </Controls:FlyoutsControl>
</Controls:MetroWindow.Flyouts>
<!-- some content -->

在cs文件中没有什么特别的东西。我该如何解决这个错误？

Answer 1

尝试删除 "MetroWindow.Flyout" ...

<controls:FlyoutsControl>
            <controls:Flyout Position="Bottom">
                      //  .. some controls .. 
             </controls:Flyout>
</controls:FlyoutsControl>