如何在代码中使用MergedDictionaries动态更改主题

Question

在论坛里面搜了很多相似的问题，但是都不能在代码中动态地更改主题。

App.Xaml中加入自定义的两个主题文件：

<Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>

                <!-- 
                    Styles that define common aspects of the platform look and feel
                    Required by Visual Studio project and item templates
                 -->
                <ResourceDictionary Source="Common/StandardStyles.xaml"/>
                <ResourceDictionary Source="Themes/CuteTheme.xaml"/>
                <ResourceDictionary Source="Themes/ProfessionalTheme.xaml"/>
            </ResourceDictionary.MergedDictionaries>

        </ResourceDictionary>
    </Application.Resources>

我有一个App Settings，其中一个Combox是更改主题，当该Combox改变时，调用App的静态方法，如下：

void App::ChangeTheme(String^ themeName)
{
	if(themeName != nullptr && !themeName->IsEmpty())
	{
		ResourceDictionary^ dic = ref new ResourceDictionary();
		String^ themePath = "ms-appx:///Themes/" + themeName + "Theme.xaml";
		Uri^ uri = ref new Uri(themePath);
		Application::LoadComponent(dic,uri,ComponentResourceLocation::Application);

		ResourceDictionary^ standardDic = ref new ResourceDictionary();
//将标准样式库加载进去
		Uri^ standardUri = ref new Uri("ms-appx:///Common/StandardStyles.xaml");
		Application::LoadComponent(standardDic,standardUri,ComponentResourceLocation::Application);

		
		App::Current->Resources->MergedDictionaries->Clear();
		App::Current->Resources->MergedDictionaries->Append(standardDic);
		App::Current->Resources->MergedDictionaries->Append(dic);

	}
}

但是，即使这样编码，样式还是不能改变，即使关闭应用再打开也不行。网上有种说法是要重新将View创建 一下，如何重新创建view？另外还有其他办法没？

谢谢！

---

Dino Wu