C#中如何使用redis

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