xamarin.forms中标签字符串格式的本地化

我发现答案在 Localizing XAML

[ContentProperty("Text")]
public class TranslateExtension : IMarkupExtension
{
    private readonly CultureInfo _ci;

    static readonly Lazy<ResourceManager> ResMgr = new Lazy<ResourceManager>(
        () => new ResourceManager(typeof(AppResources).FullName, typeof(TranslateExtension).GetTypeInfo().Assembly));

    public string Text { get; set; }

    public TranslateExtension()
    {
        if (Device.RuntimePlatform == Device.iOS || Device.RuntimePlatform == Device.Android)
        {
            _ci = DependencyService.Get<ILocalize>().GetCurrentCultureInfo();
        }
    }

    public object ProvideValue(IServiceProvider serviceProvider)
    {
        if (Text == null)
            return string.Empty;

        return ResMgr.Value.GetString(Text, _ci) ?? Text;
    }
}

<Label Text="{Binding Value, StringFormat={resources:Translate LabelTextTheValueIs}}" />