How to binding general string indexers?

[RedTellYou]

I have a general language change singleton class

public class LanguageManager : INotifyPropertyChanged
{
private readonly ResourceManager _resourceManager;
private static readonly Lazy Lazy = new(() => new LanguageManager());
public static LanguageManager Instance => Lazy.Value;

private LanguageManager()
{
    _resourceManager = new ResourceManager(typeof(Resource));
}

public string this[string name]
{
    get
    {
        if (name == null)
        {
            throw new ArgumentNullException(nameof(name));
        }
        return _resourceManager.GetString(name)!;
    }
}

public void ChangeLanguage(string languageName)
{
    var culture = CultureInfo.GetCultureInfo(languageName);
    CultureInfo.CurrentCulture = culture;
    CultureInfo.CurrentUICulture = culture;
    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Item[]"));
}

public event PropertyChangedEventHandler? PropertyChanged;

}

In WPF you can do this:

<TextBlockText="{Binding [Welcome], Source={x:Static localization:LanguageManager.Instance}}" />

But this cannot be done in WinUI3:
<TextBlock Text="{Binding [Welcome], Source={x:Static localization:LanguageManager.Instance}}" />

1. No x:static
2. Binding needs to contain a public constructor
3. Can not work If I switch to x:bind:
   
4. Is this question related to mine？[([Feature] x:Bind should support general string indexers without interface in C# #3064)]

So, In winui3, How to do?

[whiskhub]

Maybe Markup Extensions fit your needs: https://devblogs.microsoft.com/ifdef-windows/use-a-custom-resource-markup-extension-to-succeed-at-ui-string-globalization/

[RedTellYou]

也许标记扩展可以满足您的需求：https://devblogs.microsoft.com/ifdef-windows/use-a-custom-resource-markup-extension-to-succeed-at-ui-string-globalization/

This article does not seem to implement the code for dynamically switching languages

[whiskhub]

Never tried it, but in theory it looks like it should also work in WinUI 3:
https://thomaslevesque.com/2009/07/28/wpf-a-markup-extension-that-can-update-its-target/
https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.markup.markupextension.providevalue?view=windows-app-sdk-1.5#microsoft-ui-xaml-markup-markupextension-providevalue(microsoft-ui-xaml-ixamlserviceprovider)
https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.markup.iprovidevaluetarget?view=windows-app-sdk-1.5

[AndrewKeepCoding]

@RedTellYou Not an answer for you question but if you want to dynamically switch languages, try the WinUI3Localizer (Diclosure: I'm the author.).

[RedTellYou]

@whiskhub @AndrewKeepCoding My project requires WPF and WinUI3 to share MVVM, so I can only consider how to achieve multi-language compatibility. The methods you provide can only be used in WinUI3, not in WPF.