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class Users : Data
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public int PostID { get; set; }
        public int SubdivID { get; set; }
        public QueryType qType { get; set; }
        public static QueryState qState { get; set; }
        
        /// <summary>
        /// Типы запроса для QueryBuilder
        /// </summary>
        public enum QueryType : int
        {
            Insert = 1,
            Delete,
            Update,
            SelectUsers,
            SelectUser,
            SelectUsersbyName
        }

        /// <summary>
        ///  Статусы открытия формы (добавление или редактирование)
        /// </summary>
        public enum QueryState : int
        {
            Insert = 1,
            Update
        }

        public Users()
        {
            ID = -1;
            Name = null;
        }

        /// <summary>
        /// Формирует запрос на основе значения переменной qType и осуществляет выборку данных
        /// </summary>
        public void QueryBuilder()
        {
            switch (qType)
            {
                case QueryType.SelectUsers:
                    {
                        QueryText = "Select Users.ID, Users.Name, Posts.Name, Subdivisions.Name from Users, Posts, Subdivisions Where Users.SubdivID = subdivisions.ID and Users.PostID = Posts.ID";
                        Select();
                        break;
                    }
                case QueryType.SelectUser:
                    {
                        if (ID != -1)
                        {
                            QueryText = "Select Users.ID, Users.Name, Posts.Name, Subdivisions.Name, Posts.ID, Subdivisions.ID From Users, Posts, Subdivisions " +
                                        " Where Users.SubdivID = subdivisions.ID and Users.PostID = Posts.ID and Users.ID = " + ID;
                            SelectRow();
                        }
                        else
                        {
                            MessageBox.Show("ID пользователя не найден");
                        }
                        break;
                    }
                case QueryType.Insert:
                    {
                        QueryText = "Insert Into Users(Name, PostID, SubdivID) Values('" + Name + "', '" + PostID + "', '" + SubdivID + "')";
                        InsertRecord();
                        break;
                    }
                case QueryType.Delete:
                    {
                        QueryText = "Delete From Users Where ID = " + ID;
                        DeleteRecord();
                        break;
                    }
                case QueryType.Update:
                    {
                        QueryText = "Update Users set Name = '" + Name + "', PostID = '" + PostID + "', SubdivID = '" + SubdivID + "'  Where ID = " + ID;
                        UpdateRecord();
                        break;
                    }
                case QueryType.SelectUsersbyName:
                    {
                        QueryText = "Select Users.ID, Users.Name, Posts.Name, Subdivisions.Name from Users, Posts, Subdivisions " +
                                    "Where Users.SubdivID = subdivisions.ID and Users.PostID = Posts.ID and Users.Name like " + "'%" + Name + "%'";
                        Select();
                        break;
                    }
            }
        }