public ActionResult Index(int dbId, string defaultTableName = null)
        {
            Session["TableName"] = defaultTableName;
            DbId = dbId;
            var tables = ModelReader.GetTableNames();

            var items = tables.Select(tableName => new SelectListItem {
                Text = tableName, Value = tableName
            }).ToArray();

            if (items.Length == 0)
            {
                ViewBag.NoElements = (bool?)true;
            }
            else
            {
                ViewBag.NoElements = (bool?)false;
            }
            ViewBag.DbName = DataBaseInfo.Name;

            if (Session["TableName"] != null)
            {
                ViewBag.dataOfTheTable = Model;
            }

            return(View(items));
        }