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Redis总结C#中如何使用redis

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

转载自:https://www.cnblogs.com/zhangweizhong/p/4972348.html

本篇着重讲解.NET中如何使用redis和C#。

 

  Redis官网提供了很多开源的C#客户端。例如,Nhiredis ,ServiceStack.Redis ,StackExchange.Redis等。其中ServiceStack.Redis应该算是比较流行的。它提供了一整套从Redis数据结构都强类型对象转换的机制并将对象json序列化。所以这里只介绍ServiceStack.Redis,它也是目前我们产品中所使用的客户端。 

 

  ServiceStack.Redis地址https://github.com/ServiceStack/ServiceStack.Redis 

 

  1. 建立一个控制台应用程序,并引用以下ServiceStack.Redis相关的四个类库。或者通过Nuget进行安装Redis常用组件ServiceStack.Redis。 下载示例代码

      

 

  2. 创建一个Redis操作的公用类RedisCacheHelper,

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using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Web;
using ServiceStack.Common.Extensions;
using ServiceStack.Redis;
using ServiceStack.Logging;
 
namespace Weiz.Redis.RedisTest
{
    public class RedisCacheHelper
    {
        private static readonly PooledRedisClientManager pool = null;
        private static readonly string[] redisHosts = null;
        public static int RedisMaxReadPool = int.Parse(ConfigurationManager.AppSettings["redis_max_read_pool"]);
        public static int RedisMaxWritePool = int.Parse(ConfigurationManager.AppSettings["redis_max_write_pool"]);
 
        static RedisCacheHelper()
        {
            var redisHostStr = ConfigurationManager.AppSettings["redis_server_session"];
 
            if (!string.IsNullOrEmpty(redisHostStr))
            {
                redisHosts = redisHostStr.Split(',');
 
                if (redisHosts.Length > 0)
                {
                    pool = new PooledRedisClientManager(redisHosts, redisHosts,
                        new RedisClientManagerConfig()
                        {
                            MaxWritePoolSize = RedisMaxWritePool,
                            MaxReadPoolSize = RedisMaxReadPool,
                            AutoStart = true
                        });
                }
            }
        }
        public static void Add<T>(string key, T value, DateTime expiry)
        {
            if (value == null)
            {
                return;
            }
 
            if (expiry <= DateTime.Now)
            {
                Remove(key);
 
                return;
            }
 
            try
            {
                if (pool != null)
                {
                    using (var r = pool.GetClient())
                    {
                        if (r != null)
                        {
                            r.SendTimeout = 1000;
                            r.Set(key, value, expiry - DateTime.Now);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("{0}:{1}发生异常!{2}""cache""存储", key);
            }
 
        }
 
        public static void Add<T>(string key, T value, TimeSpan slidingExpiration)
        {
            if (value == null)
            {
                return;
            }
 
            if (slidingExpiration.TotalSeconds <= 0)
            {
                Remove(key);
 
                return;
            }
 
            try
            {
                if (pool != null)
                {
                    using (var r = pool.GetClient())
                    {
                        if (r != null)
                        {
                            r.SendTimeout = 1000;
                            r.Set(key, value, slidingExpiration);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("{0}:{1}发生异常!{2}""cache""存储", key);
            }
 
        }
 
 
 
        public static T Get<T>(string key)
        {
            if (string.IsNullOrEmpty(key))
            {
                return default(T);
            }
 
            T obj = default(T);
 
            try
            {
                if (pool != null)
                {
                    using (var r = pool.GetClient())
                    {
                        if (r != null)
                        {
                            r.SendTimeout = 1000;
                            obj = r.Get<T>(key);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("{0}:{1}发生异常!{2}""cache""获取", key);
            }
 
 
            return obj;
        }
 
        public static void Remove(string key)
        {
            try
            {
                if (pool != null)
                {
                    using (var r = pool.GetClient())
                    {
                        if (r != null)
                        {
                            r.SendTimeout = 1000;
                            r.Remove(key);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("{0}:{1}发生异常!{2}""cache""删除", key);
            }
 
        }
 
        public static bool Exists(string key)
        {
            try
            {
                if (pool != null)
                {
                    using (var r = pool.GetClient())
                    {
                        if (r != null)
                        {
                            r.SendTimeout = 1000;
                            return r.ContainsKey(key);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                string msg = string.Format("{0}:{1}发生异常!{2}""cache""是否存在", key);
            }
 
            return false;
        }
    }
}

  说明:RedisCacheHelper 使用的是客户端链接池模式,这样的存取效率应该是最高的。同时也更方便的支持读写分离,均衡负载。

 

  3. 配置文件

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<!-- redis Start   -->
<add key="SessionExpireMinutes" value="180" />
<add key="redis_server_session" value="127.0.0.1:6379" />
<add key="redis_max_read_pool" value="3" />
<add key="redis_max_write_pool" value="1" />
<!--redis end-->

 

  4. 测试程序调用

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class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Redis写入缓存:zhong");
 
            RedisCacheHelper.Add("zhong""zhongzhongzhong", DateTime.Now.AddDays(1));
 
            Console.WriteLine("Redis获取缓存:zhong");
 
            string str3 = RedisCacheHelper.Get<string>("zhong");
 
            Console.WriteLine(str3);
 
            Console.WriteLine("Redis获取缓存:nihao");
            string str = RedisCacheHelper.Get<string>("nihao");
            Console.WriteLine(str);
 
 
            Console.WriteLine("Redis获取缓存:wei");
            string str1 = RedisCacheHelper.Get<string>("wei");
            Console.WriteLine(str1);
 
            Console.ReadKey();
        }
    }

  

  5. 输出结果

     


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