kreta/Framework/Util/LanguageUtil.cs

using System.Collections.Generic;
using System.Globalization;

namespace Kreta.Framework.Util
{
    /// <summary>
    /// LCID alapján megmondja, hogy hanyadik indexű nyelv mezőt kell nézni.
    /// </summary>
    public class LanguageUtil
    {
        static Dictionary<string, int> m_LanguageIndexes = null;

        private static LanguageUtil _instance;
        public static LanguageUtil Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = new LanguageUtil();
                }

                return _instance;
            }
        }

        private LanguageUtil()
        {
            InitializeLanguageIndexes();
        }

        static void InitializeLanguageIndexes()
        {
            Dictionary<string, int> result = new Dictionary<string, int>();
            using (SDA.DataProvider.SDAConnection connection = SDAServer.Instance.CreateConnection())
            {
                connection.Open();
                using (SDA.DataProvider.SDACommand command = connection.CreateCommand())
                {
                    command.CommandText = @"select C_VALUE from T_SYSTEMPARAMETER where C_NAME = 'LANGUAGES'";
                    string temp = command.ExecuteScalar() as string;
                    if (temp != null)
                    {
                        string[] languages = temp.Split(',', ';');
                        for (int index = 0; index < languages.Length; index++)
                        {
                            result[languages[index].Trim().ToLower()] = index;
                        }
                    }
                }
            }
            m_LanguageIndexes = result;
        }

        public int GetLanguageIndex(int LCID)
        {
            var cultureInfo = new CultureInfo(LCID);

            string key = cultureInfo.Name.ToLower().Substring(0, 2);
            if (m_LanguageIndexes.TryGetValue(key, out int value))
            {
                return value;
            }

            if (!cultureInfo.IsNeutralCulture)
            {
                return GetLanguageIndex(cultureInfo.Parent.LCID);
            }

            return 0;
        }

    }
}