如何在启动时删除 App.xaml ResourceDictionary? [英] How to remove App.xaml ResourceDictionary at startup?

问题描述

我在 App.xaml 文件中声明了一个 ResourceDictionary，如下所示:

I have a ResourceDictionary declared in the App.xaml file as below:

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="Skins/DefaultSkin.xaml"/>
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
</Application.Resources>

问题是当我尝试在启动时加载不同的皮肤时(使用 App.xaml.cs 构造函数加载最后使用的 ResourceDictionary 皮肤)我发现 Application.Resources 中设置的 ResourceDictionary 覆盖了它并恢复到 DefaultSkin.xaml 文件 - 即使我使用 Application.Current.Resources.MergedDictionaries.Clear(); 在选择需要的皮肤之前.

The problem is that when I attempt to load a different skin at start-up (using the App.xaml.cs constructor to load the last used ResourceDictionary skin) I find that the ResourceDictionary set in Application.Resources overrides this and reverts back to the DefaultSkin.xaml file - even when I use Application.Current.Resources.MergedDictionaries.Clear(); before choosing the required skin.

当我从 Application.Resources 中删除 ResourceDictionary 时，我的应用程序运行良好 - 但是所有 xaml 引用在设计时都丢失了.如何在设计时保留此引用，但在运行时将其删除，然后才能覆盖我的皮肤选择?

My app works perfectly when I remove the ResourceDictionary from Application.Resources - but then all xaml references are lost at design time. How can I keep this reference at design time but remove it at runtime before it can override my skin choice?

推荐答案

覆盖 App.xaml.cs 中的 OnStartup 方法:

Override the OnStartup method in App.xaml.cs:

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        Resources.MergedDictionaries.Clear();
        //...
    }
}

如果你想在构造函数中清除MergedDictionaries，你应该在调用InitializeComponent()之后进行:

If you want to clear MergedDictionaries in the constructor, you should do it after you have called InitializeComponent():

public App()
{
    InitializeComponent();
    Resources.MergedDictionaries.Clear();
}

这篇关于如何在启动时删除 App.xaml ResourceDictionary?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！