C# 项目中使用 ServiceStack.Redis 操作 Redis

Redis 官网上可以找到很多针对 C# 的类库支持，这里我们选择了 ServiceStack.Redis 这个客户端，但是 ServiceStack.Redis 有个连接数限制，需要修改源码，另外一个用的比较多的是 StackExchange.Redis，这里不做介绍。

RedisConfiguration 类：

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/// <summary> /// 表示配置文件中的 Redis 配置节。 /// </summary> public sealed class RedisConfiguration : ConfigurationSection {     /// <summary>     /// 检索当前应用程序默认配置的 Redis 配置节。     /// </summary>     /// <returns>指定的 Redis 配置节对象，或者，如果该节不存在，则为 null。</returns>     public static RedisConfiguration GetConfig()     {         RedisConfiguration section = (RedisConfiguration)ConfigurationManager.GetSection("RedisConfig");         return section;     }       /// <summary>     /// 检索当前应用程序默认配置的 Redis 配置节。     /// </summary>     /// <param name="sectionName">配置节的路径和名称。</param>     /// <returns>指定的 Redis 配置节对象，或者，如果该节不存在，则为 null。</returns>     public static RedisConfiguration GetConfig(string sectionName)     {         RedisConfiguration section = (RedisConfiguration)ConfigurationManager.GetSection("RedisConfig");         if (section == null)             throw new ConfigurationErrorsException("Section " + sectionName + " is not found.");         return section;     }     /// <summary>     /// 获取或设置用于写入的 Redis 服务器地址。     /// </summary>     [ConfigurationProperty("WriteServerList", IsRequired = false)]     public string WriteServerHosts     {         get         {             return (string)base["WriteServerList"];         }         set         {             base["WriteServerList"] = value;         }     }       /// <summary>     /// 获取或设置用于读取的 Redis 服务器的主机地址。     /// </summary>     [ConfigurationProperty("ReadServerList", IsRequired = false)]     public string ReadServerHosts     {         get         {             return (string)base["ReadServerList"];         }         set         {             base["ReadServerList"] = value;         }     }       /// <summary>     /// 获取或设置 Redis Sentinel 服务器的主机地址。     /// </summary>     [ConfigurationProperty("SentinelServerList", IsRequired = false)]     public string SentinelServerHosts     {         get         {             return (string)base["SentinelServerList"];         }         set         {             base["SentinelServerList"] = value;         }     }       /// <summary>     /// 获取或设置 Redis Sentinel 服务器的密码。     /// </summary>     [ConfigurationProperty("SentinelPassword", IsRequired = false)]     public string SentinelPassword     {         get         {             return (string)base["SentinelPassword"];         }         set         {             base["SentinelPassword"] = value;         }     }       /// <summary>     /// 获取或设置 Redis 主服务器的名称。     /// </summary>     [ConfigurationProperty("MasterName", IsRequired = false)]     public string MasterName     {         get         {             string masterName = (string)base["MasterName"];             return String.IsNullOrEmpty(masterName) ? "master" : masterName;         }         set         {             base["MasterName"] = value;         }     }       /// <summary>     /// 获取或设置 Sentinel 的默认数据库。     /// </summary>     [ConfigurationProperty("SentinelDb", IsRequired = false, DefaultValue = 0)]     public int SentinelDb     {         get         {             int sentinelDb = (int)base["SentinelDb"];             return sentinelDb >= 0 ? sentinelDb : 0;         }         set         {             base["SentinelDb"] = value;         }     }       /// <summary>     /// 最大写入连接池大小。     /// </summary>     [ConfigurationProperty("MaxWritePoolSize", IsRequired = false, DefaultValue = 5)]     public int MaxWritePoolSize     {         get         {             int maxWritePoolSize = (int)base["MaxWritePoolSize"];             return maxWritePoolSize > 0 ? maxWritePoolSize : 5;         }         set         {             base["MaxWritePoolSize"] = value;         }     }       /// <summary>     /// 最大读取连接池大小。     /// </summary>     [ConfigurationProperty("MaxReadPoolSize", IsRequired = false, DefaultValue = 5)]     public int MaxReadPoolSize     {         get         {             int maxReadPoolSize = (int)base["MaxReadPoolSize"];             return maxReadPoolSize > 0 ? maxReadPoolSize : 5;         }         set         {             base["MaxReadPoolSize"] = value;         }     }       /// <summary>     /// 自动重启。     /// </summary>     [ConfigurationProperty("AutoStart", IsRequired = false, DefaultValue = true)]     public bool AutoStart     {         get         {             return (bool)base["AutoStart"];         }         set         {             base["AutoStart"] = value;         }     }       /// <summary>     /// 本地缓存到期时间，单位：秒。     /// </summary>     [ConfigurationProperty("CacheExpires", IsRequired = false, DefaultValue = 36000)]     public int CacheExpires     {         get         {             return (int)base["CacheExpires"];         }         set         {             base["CacheExpires"] = value;         }     }         /// <summary>     /// 是否记录日志，该设置仅用于排查 Redis 运行时出现的问题，如 Redis 工作正常，请关闭该项。     /// </summary>     [ConfigurationProperty("RecordeLog", IsRequired = false, DefaultValue = false)]     public bool RecordeLog     {         get         {             return (bool)base["RecordeLog"];         }         set         {             base["RecordeLog"] = value;         }     }   }

RedisKeys 类定义全局 Key：

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/// <summary> /// 全局 Key 定义。 /// </summary> public static class RedisKeys {       #region 广告相关...       /// <summary>     /// 指定城市唯一编号指定唯一广告编号的信息实体对象，{0}：指定城市唯一编号，{1}：指定广告编码。     /// </summary>     public static readonly string ADVERTISEMENTSEAT_CITY_BAIDUADID = "AdvertisementSeat_City_{0}_BaiDuAdId_{1}";     /// <summary>     /// 指定城市唯一编号指定广告投放目标的信息实体对象，{0}：指定城市唯一编号，{1}：指定广告投放目标。     /// </summary>     public static readonly string ADVERTISEMENTSEAT_CITY_BAIDUADID_TARGET = "AdvertisementSeat_City_{0}_Target_{1}";     /// <summary>     /// 指定城市唯一编号指定唯一广告编号的信息实体对象，{0}：指定城市唯一编号，{1}：指定产品类型编码。     /// </summary>     public static readonly string ADVERTISEMENTSEAT_CITY_CONDITION = "AdvertisementSeat_City_{0}_Condition_{1}";       #endregion   }

RedisConnectType 类定义 Redis 建立连接的方式，连接池模式，及时连接及时释放模式：

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/// <summary> /// 定义 Redis 建立连接的方式，连接池模式，及时连接及时释放模式。 /// </summary> public enum RedisConnectType {     /// <summary>     /// 连接池链接方式。     /// </summary>     PooledRedisClient,     /// <summary>     /// 短连接方式，用完就释放的模式。     /// </summary>     ShortConnectClient }

RedisExpires 中统一定义了 Redis 数据的有效时间：

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/// <summary> /// Redis 有效时间（单位：分钟）定义类。 /// </summary> public static class RedisExpires {     /// <summary>     /// 1 分钟。     /// </summary>     public static readonly int ONE_MINUTE = 1;       /// <summary>     /// 10 分钟。     /// </summary>     public static readonly int TEN_MINUTE = 10;       /// <summary>     /// 半小时。     /// </summary>     public static readonly int HALF_HOUR = 30;       /// <summary>     /// 1 小时。     /// </summary>     public static readonly int ONE_HOUR = 60;       /// <summary>     /// 半天。     /// </summary>     public static readonly int HALF_DAY = 60 * 12;       /// <summary>     /// 1 天。     /// </summary>     public static readonly int ONE_DAY = 60 * 24;       /// <summary>     /// 1 周。     /// </summary>     public static readonly int ONE_WEEK = 7 * 60 * 24;       /// <summary>     /// 1 个月。     /// </summary>     public static readonly int ONE_MONTH = 30 * 60 * 24; }

RedisManager 类中提供了常用的操作：

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/// <summary>     /// 提供一组用于 Redis 连接池管理对象的工具和方法。     /// </summary>     public sealed class RedisManager     {         /// <summary>         /// 声明 Redis 配置信息。         /// </summary>         private static RedisConfiguration _redisConfiguration = RedisConfiguration.GetConfig();         /// <summary>         /// 声明 Redis 客户端连接的线程安全池对象。         /// </summary>         private static IRedisClientsManager _redisClientsManager = null;         ///// <summary>         ///// 建立 Redis 连接的方式（默认是连接池的方式）。         ///// </summary>         //private RedisConnectType ConnnectType = RedisConnectType.PooledRedisClient;         ///// <summary>         ///// ip         ///// </summary>         //private string RedisServerIP = "";         ///// <summary>         ///// 端口         ///// </summary>         //private int RedisServerPort = 6379;         ///// <summary>         ///// 数据库编号         ///// </summary>         //private int RedisServerDb = 0;         /// <summary>         /// 声明 _lockObject 对象。         /// </summary>         private object _lockObject = new object();           /// <summary>         /// 初始化 Redis 连接池管理对象。         /// </summary>         static RedisManager()         {             CreateManager();         }             /// <summary>         /// 创建 Redis 连接池管理对象。         /// </summary>         private static void CreateManager()         {             string[] sentinelServerHosts = SplitServerHosts(_RedisConfiguration.SentinelServerHosts, ",");             var redisSentinel = new RedisSentinel(sentinelServerHosts, _RedisConfiguration.MasterName);             _redisClientsManager = redisSentinel.Start();         }           /// <summary>         /// 取得服务器主机地址集合。         /// </summary>         /// <param name="serverHosts">服务器主机地址。</param>         /// <param name="split">分隔符。</param>         /// <returns>服务器主机地址集合。</returns>         private static string[] SplitServerHosts(string serverHosts, string split)         {             return serverHosts.Split(split.ToArray());         }           /// <summary>         /// 获取 Redis 客户端缓存操作对象。         /// </summary>         public static IRedisClient GetClient()         {             if (_redisClientsManager == null)                 CreateManager();             var redisClient = _redisClientsManager.GetClient();             redisClient.Password = _RedisConfiguration.SentinelPassword; #if(DEBUG)             redisClient.Db = _RedisConfiguration.SentinelDb; #endif             return redisClient;         }           /// <summary>         /// 刷新全部数据。         /// </summary>         public static void FlushAll()         {             using (IRedisClient redis = GetClient())             {                 redis.FlushAll();             }         }           #region 项...           /// <summary>         /// 设置指定的项到指定的键中。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>如果设置成功，则为 true；否则为 false。</returns>         public static bool ItemSet<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 return redis.Set(key, t);             }         }           /// <summary>         /// 设置指定的项到指定的键中。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <param name="expire">指定的有效期（单位：分钟）。</param>         /// <returns>如果设置成功，则为 true；否则为 false。</returns>         public static bool ItemSetExpire<T>(string key, T t, int expire)         {             using (IRedisClient redis = GetClient())             {                 return redis.Set(key, t, DateTime.Now.Add(TimeSpan.FromMinutes(expire)));             }         }           /// <summary>         /// 获取指定的键的项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>如果存在该项，则返回该项，否则返回 null。</returns>         public static T ItemGet<T>(string key) where T : class         {             using (IRedisClient redis = GetClient())             {                 return redis.Get<T>(key);             }         }           /// <summary>         /// 移除指定的键的项。         /// </summary>         /// <param name="key">指定的键。</param>         /// <returns>如果移除成功，则为 true；否则为 false。</returns>         public static bool ItemRemove(string key)         {             using (IRedisClient redis = GetClient())             {                 return redis.Remove(key);             }         }           #endregion           #region 列表...           /// <summary>         /// 添加项到指定键的列表。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         public static void ListAdd<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 redisTypedClient.AddItemToList(redisTypedClient.Lists[key], t);             }         }           /// <summary>         /// 将指定的对象集合的元素添加到指定键的列表末尾。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="tList">指定的项的集合。</param>         public static void ListAddRange<T>(string key, List<T> tList)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 redisTypedClient.Lists[key].AddRange(tList);             }         }           /// <summary>         /// 从指定键的列表中移除指定的项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>返回一个值，该值表示是否移除成功。</returns>         public static bool ListRemove<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 return redisTypedClient.RemoveItemFromList(redisTypedClient.Lists[key], t) > 0;             }         }           /// <summary>         /// 从指定键的列表中移除所有的项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         public static void ListRemoveAll<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 redisTypedClient.Lists[key].RemoveAll();             }         }           /// <summary>         /// 获取指定键的列表中实际包含的元素数。         /// </summary>         /// <param name="key">指定的键。</param>         /// <returns>指定的键中实际包含的元素数。</returns>         public static int ListCount(string key)         {             using (IRedisClient redis = GetClient())             {                 return (int)redis.GetListCount(key);             }         }           /// <summary>         /// 从指定键的列表中获取指定范围的元素。         /// </summary>         /// <typeparam name="T">指定项的类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="start">范围开始处的从零开始的索引。</param>         /// <param name="count">范围中的元素数。</param>         /// <returns>指定键的列表中的范围的元素。</returns>         public static List<T> ListGetRange<T>(string key, int index, int count)         {             using (IRedisClient redis = GetClient())             {                 var c = redis.As<T>();                 return c.Lists[key].GetRange(index, index + count - 1);             }         }           /// <summary>         /// 获取指定键的列表中的所有元素。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>指定键的列表中的范围的元素。</returns>         public static List<T> ListGetAll<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 var c = redis.As<T>();                 return c.Lists[key].GetRange(0, c.Lists[key].Count);             }         }           /// <summary>         /// 分页获取指定键的列表中的元素。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="pageIndex">指定的分页索引。</param>         /// <param name="pageSize">指定的分页大小。</param>         /// <returns>指定键的列表中的范围的元素。</returns>         public static List<T> ListGetAll<T>(string key, int pageIndex, int pageSize)         {             int start = pageSize * (pageIndex - 1);             return ListGetRange<T>(key, start, pageSize);         }           /// <summary>         /// 设置指定键的列表的有效期。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="datetime">有效期。</param>         public static void ListSetExpire(string key, DateTime datetime)         {             using (IRedisClient redis = GetClient())             {                 redis.ExpireEntryAt(key, datetime);             }         }           #endregion           #region 集合...           /// <summary>         /// 将一个或多个元素加入到集合指定的键中，已经存在于集合的元素将被忽略。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         public static void SetAdd<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 redisTypedClient.Sets[key].Add(t);             }         }           /// <summary>         /// 获取指定的键的集合中实际包含的元素数。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>指定的键的集合中实际包含的元素数。</returns>         public static int SetCount<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 return redisTypedClient.Sets[key].Count();             }         }           /// <summary>         /// 确定某项是否在指定键的集合中。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>如果存在该项，则为 true；否则为 false。</returns>         public static bool SetContains<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 return redisTypedClient.Sets[key].Contains(t);             }         }           /// <summary>         /// 从指定键的集合中移除特定对象的第一个匹配项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>如果移除成功，则为 true；否则为 false。</returns>         public static bool SetRemove<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 return redisTypedClient.Sets[key].Remove(t);             }         }           /// <summary>         /// 获取指定键的数据集的所有项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>指定键的数据集的所有项</returns>         public static IList<T> SetGetAll<T>(string key)         {             List<T> result = new List<T>();             using (IRedisClient redis = GetClient())             {                 var redisTypedClient = redis.As<T>();                 var sets = redisTypedClient.Sets[key];                   if (sets != null && sets.Count > 0)                 {                     foreach (var item in sets)                     {                         result.Add(item);                     }                 }             }             return result;         }           #endregion           #region 哈希表...           /// <summary>         /// 确定某项是否在指定键的哈希表中。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="dataKey">数据项的键。</param>         /// <returns>如果存在该项，则为 true；否则为 false。</returns>         public static bool HashSetContains<T>(string key, string dataKey)         {             using (IRedisClient redis = GetClient())             {                 return redis.HashContainsEntry(key, dataKey);             }         }           /// <summary>         /// 设置指定的项到指定键的哈希表中。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="dataKey">数据项的键。</param>         /// <returns>如果设置成功，则为 true；否则为 false。</returns>         public static bool HashSetAdd<T>(string key, string dataKey, T t)         {             using (IRedisClient redis = GetClient())             {                 string value = JsonSerializer.SerializeToString(t);                 return redis.SetEntryInHash(key, dataKey, value);             }         }           /// <summary>         /// 移除哈希表中指定键的项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="dataKey">数据项的键。</param>         /// <returns>如果移除成功，则为 true；否则为 false。</returns>         public static bool HashSetRemove(string key, string dataKey)         {             using (IRedisClient redis = GetClient())             {                 return redis.RemoveEntryFromHash(key, dataKey);             }         }           /// <summary>         /// 移除哈希表中的所有项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="dataKey">数据项的键。</param>         /// <returns>如果移除成功，则为 true；否则为 false。</returns>         public static bool HashSetRemoveAll(string key)         {             using (IRedisClient redis = GetClient())             {                 return redis.Remove(key);             }         }           /// <summary>         /// 获取哈希表中的指定键的项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="dataKey">数据项的键。</param>         /// <returns>指定键的哈希表的项。</returns>         public static T HashSetGet<T>(string key, string dataKey)         {             using (IRedisClient redis = GetClient())             {                 string value = redis.GetValueFromHash(key, dataKey);                 return JsonSerializer.DeserializeFromString<T>(value);             }         }           /// <summary>         /// 获取指定键的哈希表的所有项。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>指定键的哈希表的所有项。</returns>         public static List<T> HashSetGetAll<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 var list = redis.GetHashValues(key);                 if (list != null && list.Count > 0)                 {                     List<T> result = new List<T>();                     foreach (var item in list)                     {                         var value = JsonSerializer.DeserializeFromString<T>(item);                         result.Add(value);                     }                     return result;                 }                 return null;             }         }           /// <summary>         /// 设置指定键的哈希表的有效期。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="expire">指定的有效期时间（单位：分钟）。</param>         public static void HashSetExpire(string key, int expire)         {             using (IRedisClient redis = GetClient())             {                 redis.ExpireEntryAt(key, DateTime.Now.Add(TimeSpan.FromMinutes(expire)));             }         }           #endregion           #region 有序集合...           /// <summary>         /// 添加指定项到指定键的有序集合。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>如果成功添加，则为 true；否则为 false。</returns>         public static bool SortedSetAdd<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 string value = JsonSerializer.SerializeToString<T>(t);                 return redis.AddItemToSortedSet(key, value);             }         }             /// <summary>         /// 添加指定项到指定键的有序集合，评分用于排序。如果该元素已经存在，则根据评分更新该元素的顺序。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <param name="score">用于排序的评分值。</param>         /// <returns>如果成功添加，则为 true；否则为 false。</returns>         public static bool SortedSetAdd<T>(string key, T t, double score)         {             using (IRedisClient redis = GetClient())             {                 string value = JsonSerializer.SerializeToString<T>(t);                 return redis.AddItemToSortedSet(key, value, score);             }         }           /// <summary>         /// 从指定键的有序集合中移除指定的元素。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>如果成功移除，则为 true；否则为 false。</returns>         public static bool SortedSetRemove<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 string value = ServiceStack.Text.JsonSerializer.SerializeToString<T>(t);                 return redis.RemoveItemFromSortedSet(key, value);             }         }           /// <summary>         /// 从指定键的有序集合尾部移除指定的索引后的匹配项。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="size">保留的条数。</param>         /// <returns>移除的元素数量。</returns>         public static int SortedSetTrim(string key, int size)         {             using (IRedisClient redis = GetClient())             {                 return (int)redis.RemoveRangeFromSortedSet(key, size, 9999999);             }         }           /// <summary>         /// 获取指定的键的有序集合中实际包含的元素数。         /// </summary>         /// <param name="key">指定的键。</param>         /// <returns>指定的键的有序集合中实际包含的元素数。</returns>         public static int SortedSetCount(string key)         {             using (IRedisClient redis = GetClient())             {                 return (int)redis.GetSortedSetCount(key);             }         }           /// <summary>         /// 分页获取指定键的有序集合中的元素。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="pageIndex">指定的分页索引。</param>         /// <param name="pageSize">指定的分页大小。</param>         /// <returns>指定键的有序集合中的元素集合。</returns>         public static List<T> SortedSetGetList<T>(string key, int pageIndex, int pageSize)         {             using (IRedisClient redis = GetClient())             {                 var list = redis.GetRangeFromSortedSet(key, (pageIndex - 1) * pageSize, pageIndex * pageSize - 1);                 if (list != null && list.Count > 0)                 {                     List<T> result = new List<T>();                     foreach (var item in list)                     {                         var data = ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(item);                         result.Add(data);                     }                     return result;                 }             }             return null;         }             /// <summary>         /// 获取指定键的有序集合中的所有元素。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns>指定键的有序集合中的元素集合。</returns>         public static List<T> SortedSetGetListALL<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 var list = redis.GetRangeFromSortedSet(key, 0, 9999999);                 if (list != null && list.Count > 0)                 {                     List<T> result = new List<T>();                     foreach (var item in list)                     {                         var data = JsonSerializer.DeserializeFromString<T>(item);                         result.Add(data);                     }                     return result;                 }             }             return null;         }           /// <summary>         /// 设置指定键的有序集合的有效期。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="expire">指定的有效期（单位：分钟）。</param>         public static void SortedSetSetExpire(string key, int expire)         {             using (IRedisClient redis = GetClient())             {                 redis.ExpireEntryAt(key, DateTime.Now.Add(TimeSpan.FromMinutes(expire)));             }         }           /// <summary>         /// 获取指定键的有序集合中的指定元素的评分。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t">指定的项。</param>         /// <returns>指定键的有序集合中的指定元素的评分。</returns>         public static double SortedSetGetItemScore<T>(string key, T t)         {             using (IRedisClient redis = GetClient())             {                 var data = ServiceStack.Text.JsonSerializer.SerializeToString<T>(t);                 return redis.GetItemScoreInSortedSet(key, data);             }         }           #endregion           #region 二进制...           /// <summary>         /// 设置 BitMap 值，返回 0 或 1 是成功，返回 -1 是失败。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="offset">偏移量。</param>         /// <param name="value">值只能是 0 或 1，其它的值会报错</param>         /// <returns>返回 0 或 1 是成功，返回 -1 是失败。</returns>         public static long BitSet(string key, int offset, int value)         {             using (IRedisClient redis = GetClient())             {                 var rc = redis as RedisClient;                 if (rc != null)                 {                     return rc.SetBit(key, offset, value);                 }                 return -1;             }         }           /// <summary>         /// 获取 BitMap 值，返回 0 或 1 是成功，返回 -1 是失败。         /// </summary>         /// <param name="key">指定的键。</param>         /// <param name="offset">偏移量。</param>         /// <returns>返回 0 或 1 是成功，返回 -1 是失败。</returns>         public static long BitGet(string key, int offset)         {             using (IRedisClient redis = GetClient())             {                 var rc = redis as RedisClient;                 if (rc != null)                 {                     return rc.GetBit(key, offset);                 }                 return -1;             }         }           public bool ByteSet<T>(string key, T t)         {             bool result = false;             if (t != null)             {                 MemoryStream ms = new MemoryStream();                 Serialize(t, ms);                 byte[] data = ms.ToArray();                 using (IRedisClient redis = GetClient())                 {                     return redis.Set(key, data);                 }             }             return result;           }           /// <summary>         /// 写入一个实体类T，将其转换成二制进存储，并且数据过期时间一到则立刻删除         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <param name="t"></param>         /// <param name="Expire"></param>         /// <returns></returns>         public bool ByteSetExpire<T>(string key, T t, DateTime Expire)         {             bool flag = false;             if (t != null)             {                 MemoryStream ms = new MemoryStream();                 Serialize<T>(t, ms);                 byte[] data = ms.ToArray();                 using (IRedisClient redis = GetClient())                 {                     TimeSpan ts = Expire - DateTime.Now;                     flag = redis.Set(key, data, ts);                 }             }             return flag;         }           /// <summary>         /// 获取 key 值为 key 的实体类 T。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="key">指定的键。</param>         /// <returns></returns>         public T ByteGet<T>(string key)         {             using (IRedisClient redis = GetClient())             {                 byte[] data = redis.Get<byte[]>(key);                 if (data == null || data.Length == 0)                 {                     return default(T);                 }                 using (MemoryStream ms = new MemoryStream())                 {                     ms.Write(data, 0, data.Length);                     ms.Position = 0;                     return Deserialize<T>(ms);                 }             }         }           #endregion           #region 其他方法...           /// <summary>         /// 获取当前服务器中的所有 Key。         /// </summary>         /// <returns>当前服务器中的所有 Key 的集合。</returns>         public static List<string> GetAllKeys()         {             using (IRedisClient redis = GetClient())             {                 return redis.GetAllKeys();             }         }           /// <summary>         /// 移除指定集合中的所有 Key。         /// </summary>         /// <param name="keys">指定的 Key 集合。</param>         public static void RemoveAll(IEnumerable<string> keys)         {             using (IRedisClient redis = GetClient())             {                 redis.RemoveAll(keys);             }         }           /// <summary>         /// 确定指定的键是否在 Redis 数据库中。         /// </summary>         /// <param name="key">指定的键。</param>         /// <returns>若存在指定的键，则返回 true，否则返回 false。</returns>         public static bool ContainsKey(string key)         {             using (IRedisClient redis = GetClient())             {                 return redis.ContainsKey(key);             }         }           /// <summary>         /// 获取当前数据库服务器中的指定的 Key。         /// </summary>         /// <param name="key">指定的键。</param>         /// <returns>若移除指定的键成功，则返回 true，否则返回 false。</returns>         public static bool Remove(string key)         {             using (IRedisClient redis = GetClient())             {                 return redis.Remove(key);             }         }           /// <summary>         /// 获取当前 Redis 信息。         /// </summary>         /// <returns>当前 Redis 信息。</returns>         public Dictionary<string, string> GetInfo()         {             using (IRedisClient redis = GetClient())             {                 return redis.Info;             }         }           /// <summary>         /// 将指定的对象序列化成二进制对象。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="obj">指定的对象。</param>         /// <param name="stream">序列化的二进制对象。</param>         private static void Serialize<T>(T obj, Stream stream)         {             if (stream == null)                 throw new ArgumentNullException("stream");             var formatter = new BinaryFormatter();             formatter.Serialize(stream, obj);         }           /// <summary>         /// 将指定的二进制对象反序列化成对象。         /// </summary>         /// <typeparam name="T">指定的项类型。</typeparam>         /// <param name="obj">指定的对象。</param>         /// <param name="stream">序列化的二进制对象。</param>         /// <returns>反序列化的对象。</returns>         public static T Deserialize<T>(Stream stream)         {             if (stream == null)                 throw new ArgumentNullException("stream");               var formatter = new BinaryFormatter();             return (T)formatter.Deserialize(stream);         }           #endregion       }