//获取池中的连接
        public MySqlConnectHelper getConnection()
        {
            lock (pool)
            {
                MySqlConnectHelper tmp = null;
                if (pool.Count > 0)
                {
                    tmp = (MySqlConnectHelper)pool[0];



                    pool.RemoveAt(0);
                    //不成功
                    if (!isUserful(tmp))
                    {
                        //可用的连接数据已去掉一个
                        useCount--;
                        tmp = getConnection();
                    }
                }
                else
                {
                    //可使用的连接小于连接数量
                    if (useCount < PoolSize)
                    {
                        try

                        {
                            //创建连接
                            MySqlConnectHelper conn = new MySqlConnectHelper(ConnectionStr);
                            conn.OpenConnect();
                            useCount++;
                            tmp = conn;
                        }
                        catch (Exception e)
                        {
                        }
                    }
                }
                return(tmp);
            }
        }
        public int InitMySqlConnectPool()
        {
            int ConnectSize = 0;

            for (; ConnectSize < PoolSize; ConnectSize++)
            {
                MySqlConnectHelper newConnect = new MySqlConnectHelper(ConnectionStr);

                if (newConnect.OpenConnect() == true)
                {
                    pool.Add(newConnect);
                }
                else
                {
                    break;
                }
            }

            if (ConnectSize < 1)
            {
                return(-1);
            }
            return(ConnectSize);
        }