C4IT-F4SD-Client/FasdDesktopUi/Basics/Converter/LanguageCultureConverter.cs

using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Markup;

namespace FasdDesktopUi.Basics.Converter
{
    [ValueConversion(typeof(string), typeof(XmlLanguage))]
    internal class LanguageCultureConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is string tag))
                return Binding.DoNothing;

            return XmlLanguage.GetLanguage(tag);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is XmlLanguage lang))
                return Binding.DoNothing;

            return lang.IetfLanguageTag;
        }
    }
}