Redis 红包

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ServiceStack.Redis;

namespace testRedis
{
    class Program
    {
        static void Main(string[] args)
        {
            //1.
            double totalAmount = 100;
            int num = 10;
            double minAmount = 0.01;
            RedisClient client = new RedisClient("127.0.0.1", 6379);
            Queue<double> qu = new Queue<double>();
            Random r = new Random();
            for (int i = 1; i < num; i++)
            {
                //(总金额-（总人数-第一个人）*最小金额)/(总人数-第一个人）
                //安全金额
                double safeAmount = (totalAmount - (num - i) * minAmount) / (num - i);
                double money = NextDouble(r, minAmount * 100, safeAmount * 100) / 100;
                money = Math.Round(money, 2, MidpointRounding.AwayFromZero);
                totalAmount = totalAmount - money;
                totalAmount = Math.Round(totalAmount, 2, MidpointRounding.AwayFromZero);
                qu.Enqueue(money);
                Console.WriteLine("第" + i + "个红包：" + money + " 元，余额：" + totalAmount + " 元");
            }
            Console.WriteLine("第" + num + "个红包：" + totalAmount + " 元，余额：0 元");
            client.Add<Queue<double>>("key", qu);
            //模拟，当点击抢
            Queue<double> que = client.Get<Queue<double>>("key");
            if (que.Count > 0)
            {
                double am = que.Dequeue();
                var t = new { name = "123213", amount = am, date = DateTime.Now };

            }
            else
            {
                //没了
            }
            Console.ReadKey();
        }

        /// <summary>
        /// 生成设置范围内的Double的随机数
        /// eg:_random.NextDouble(1.5, 2.5)
        /// </summary>
        /// <param name="random">Random</param>
        /// <param name="miniDouble">生成随机数的最大值</param>
        /// <param name="maxiDouble">生成随机数的最小值</param>
        /// <returns>当Random等于NULL的时候返回0;</returns>
        protected static double NextDouble(Random random, double miniDouble, double maxiDouble)
        {
            if (random != null)
            {
                return random.NextDouble() * (maxiDouble - miniDouble) + miniDouble;
            }
            else
            {
                return 0.0d;
            }
        }
    }
}