DC_Initlizer/AwInitilizer/Cultures/CulturesHelper.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace AwInitilizer.Cultures
{
    public enum Languages
    {
        English, TraditionalChinese, SimplfyChinese
    }

    public class CulturesHelper
    {
        private static Lazy<CulturesHelper> _Instance = new Lazy<CulturesHelper>(() => new CulturesHelper());
        public static CulturesHelper Instance
        {
            get
            {
                return _Instance.Value;
            }
        }

        private static string resourcePrefix = "StringResource";
        private static string culturesFolder = "Cultures";
        private static List<CultureInfo> _supportedCultures = new List<CultureInfo>();
        public static List<CultureInfo> SupportedCultures
        {
            get
            {
                return _supportedCultures;
            }
        }
        private static ResourceDictionary resourceDictionary;
        public static ResourceDictionary ResourceDictionary
        {
            get
            {
                return resourceDictionary;
            }
        }
        public Languages CurrentCulture { get; private set; }
        public event EventHandler<Languages> OnCultureChange;

        private CulturesHelper()
        {

            CultureInfo cultureInfo = new CultureInfo("");
            List<string> files = Directory.GetFiles(string.Format("{0}\\{1}", Directory.GetCurrentDirectory(), culturesFolder))
            .Where(s => s.Contains(resourcePrefix) && s.ToLower().EndsWith("xaml")).ToList();
            foreach (string file in files)
            {
                try
                {
                    string cultureName = file.Substring(file.IndexOf(".") + 1).Replace(".xaml", "");
                    cultureInfo = CultureInfo.GetCultureInfo(cultureName);
                    if (cultureInfo != null)
                    {
                        _supportedCultures.Add(cultureInfo);
                    }
                }
                catch (ArgumentException)
                {
                }
            }

        }
        public void ChangeCulture(CultureInfo culture)
        {
            if (_supportedCultures.Contains(culture))
            {
                string loadedFileName = string.Format("{0}\\{1}\\{2}.{3}.xaml",
                    Directory.GetCurrentDirectory(),
                    culturesFolder,
                    resourcePrefix,
                    culture.Name);
                //FileStream fileStream = new FileStream(loadedFileName, FileMode.Open);
                //resourceDictionary = XamlReader.Load(fileStream) as ResourceDictionary;
                resourceDictionary = new ResourceDictionary() { Source = new Uri(loadedFileName) };

                Application.Current.Resources.MergedDictionaries.Add(resourceDictionary);
                //MainWindow.window.Resources.MergedDictionaries.Add(resourceDictionary);
                //Properties.Settings.Default.DefaultCulture = culture;
                //Properties.Settings.Default.Save();
                if (culture.Name == "en-US")
                {
                    CurrentCulture = Languages.English;
                }
                else if (culture.Name == "zh-TW")
                {
                    CurrentCulture = Languages.TraditionalChinese;
                }
                else if (culture.Name == "zh-CHS")
                {
                    CurrentCulture = Languages.SimplfyChinese;
                }

                OnCultureChange?.Invoke(this, CurrentCulture);
            }

        }
    }
}