当天消费超过指定金额领取奖金的方法

数据库中有一个消费记录表

字段有：user_id,bet_money等

查询测试语句：

SELECT     COUNT(bet_money) AS Expr1
FROM         lottery_bet
WHERE     (user_id = '5557682') AND (DATEDIFF(dd, date_time, GETDATE()) = 0)

这个函数算出消费时间和当前时间的日差为0，说明为当天消费金额

count()函数统计出所有当日消费的金额

/// <summary>
        /// 获取用户当天的投注额
        /// </summary>
        /// <returns>投注额</returns>
        public int getUserBet()
        {
            string sql = "select count([bet_money]) from [lottery_bet] where user_id=@user_id and DATEDIFF(dd,[data_time],DateTime.Now)=0";
            manageDB manageDB = new manageDB();
            return manageDB.getRecordQuantity(sql);
        }

public int getRecordQuantity(string sql)
        {
            int result = 0;
            try
            {
                this.openDB();
                this.comm.CommandType = CommandType.Text;
                this.comm.CommandText = sql;
                result = (int)this.comm.ExecuteScalar();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToString());
            }
            finally
            {
                this.closeDB();
            }
            return result;
        }