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C#客户端StackExchange.Redis

操作步骤如下所示：

1. 下载并安装StackExchange.Redis。
2. 添加引用。 

   using StackExchange.Redis;

3. 初始化ConnectionMultiplexer。

   ConnectionMultiplexer是StackExchange.Redis的核心，它被整个应用程序共享和重用，应该设置为单例，它的初始化如下： 

    // redis config
    private static ConfigurationOptions configurationOptions = ConfigurationOptions.Parse("127.0.0.1:6379,password=xxx,connectTimeout=2000");
     //the lock for singleton
    private static readonly object Locker = new object();
     //singleton
    private static ConnectionMultiplexer redisConn;
    //singleton
    public static ConnectionMultiplexer getRedisConn()
    {
        if (redisConn == null)
        {
            lock (Locker)
            {
                if (redisConn == null || !redisConn.IsConnected)
                {
                    redisConn = ConnectionMultiplexer.Connect(configurationOptions);
                }
            }
        }
        return redisConn;
    }

   说明

   ConfigurationOptions包含很多选项，例如keepAlive、connectRetry、name，具体可以参考StackExchange.Redis.ConfigurationOptions。

4. GetDatabase()返回的对象是轻量级的，每次用的时候从ConnectionMultiplexer对象中获取即可。 

    redisConn = getRedisConn();
    var db = redisConn.GetDatabase();

5. 下面给出5种数据结构的demo，它们的API和原生略有不同，分别用String、Hash、List、Set、SortedSet开头代表5种数据结构。

   • string： 

     //set get
     string strKey = "hello";
     string strValue = "world";
     bool setResult = db.StringSet(strKey, strValue);
     Console.WriteLine("set " + strKey + " " + strValue + ", result is " + setResult);
     //incr
     string counterKey = "counter";
     long counterValue = db.StringIncrement(counterKey);
     Console.WriteLine("incr " + counterKey + ", result is " + counterValue);
     //expire
     db.KeyExpire(strKey, new TimeSpan(0, 0, 5));
     Thread.Sleep(5 * 1000);
     Console.WriteLine("expire " + strKey + ", after 5 seconds, value is " + db.StringGet(strKey));
     //mset mget
     KeyValuePair<RedisKey, RedisValue> kv1 = new KeyValuePair<RedisKey, RedisValue>("key1", "value1");
     KeyValuePair<RedisKey, RedisValue> kv2 = new KeyValuePair<RedisKey, RedisValue>("key2", "value2");
     db.StringSet(new KeyValuePair<RedisKey, RedisValue>[] {kv1,kv2});            
     RedisValue[] values = db.StringGet(new RedisKey[] {kv1.Key, kv2.Key});
     Console.WriteLine("mget " + kv1.Key.ToString() + " " + kv2.Key.ToString() + ", result is " + values[0] + "&&" + values[1]);

   • hash 

     string hashKey = "myhash";
     //hset
     db.HashSet(hashKey,"f1","v1");
     db.HashSet(hashKey,"f2", "v2");
     HashEntry[] values = db.HashGetAll(hashKey);
     //hgetall
     Console.Write("hgetall " + hashKey + ", result is");
     for (int i = 0; i < values.Length;i++) 
     {
       HashEntry hashEntry = values[i];
       Console.Write(" " + hashEntry.Name.ToString() + " " + hashEntry.Value.ToString());
     }
     Console.WriteLine();

   • list 

     //list key
     string listKey = "myList";
     //rpush
     db.ListRightPush(listKey, "a");
     db.ListRightPush(listKey, "b");
     db.ListRightPush(listKey, "c");
     //lrange
     RedisValue[] values = db.ListRange(listKey, 0, -1);
     Console.Write("lrange " + listKey + " 0 -1, result is ");
     for (int i = 0; i < values.Length; i++)
     {
      Console.Write(values[i] + " ");
     }
     Console.WriteLine();

   • set 

     //set key
     string setKey = "mySet";
     //sadd
     db.SetAdd(setKey, "a");
     db.SetAdd(setKey, "b");
     db.SetAdd(setKey, "c");
     //sismember
     bool isContains = db.SetContains(setKey, "a");
     Console.WriteLine("set " + setKey + " contains a is " + isContains );

   • sortedset 

     string sortedSetKey = "myZset";
     //sadd
     db.SortedSetAdd(sortedSetKey, "xiaoming", 85);
     db.SortedSetAdd(sortedSetKey, "xiaohong", 100);
     db.SortedSetAdd(sortedSetKey, "xiaofei", 62);
     db.SortedSetAdd(sortedSetKey, "xiaotang", 73);
     //zrevrangebyscore
     RedisValue[] names = db.SortedSetRangeByRank(sortedSetKey, 0, 2, Order.Ascending);
     Console.Write("zrevrangebyscore " + sortedSetKey + " 0 2, result is ");
     for (int i = 0; i < names.Length; i++)
     {
       Console.Write(names[i] + " ");
     }
     Console.WriteLine();

      

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