数据库的DataBase connection 简单池功能启示

bsp;      protected override bool ValiDate(SqlConnection t)
        {
            try
            {
                return !(t.State.Equals(ConnectionState.Closed));
            }
            catch (SqlException)
            {
                return false;
            }
        }

        /// <summary>
        /// 关闭数据库连接
        /// </summary>
        /// <param name="t">数据库连接对象</param>
        protected override void Expire(SqlConnection t)
        {
            try
            {
                if (t.State == ConnectionState.Open)
                {
                    t.Close();                 
                }
            }
            catch (SqlException)
            {

            }
        }

        /// <summary>
        /// 从池中获取数据库连接
        /// </summary>
        /// <returns>数据库连接对象</returns>
        public SqlConnection BorrowDBConn()
        {
            try
            {
                return base.GetObjectFromPool();