用redis来实现Session保存的一个简单Demo

现在很多项目都用Redis（RedisSessionStateProvider）来保存Session数据，但是最近遇到一个比较典型的情况，需要把用户数据全部load到redis里面，在加上RedisSessionStateProvider本身的数据，造成很多内存的浪费。首先我们要知道Session会针对用户的数据，比如用户在chrome登录会保存一套信息，用ie登录有保存一套信息，用FF登录还是保存一套信息，那么redis就保存了3套一样的session data数据。

如RedisSessionStateProvider默认会生成*****_Data来保存我们的session数据，******_Internal来记录session过期，这里的*****_2qfxy3ie51m5oneffzr0jkrd****和****_isudg4h01axx3lnd3pao4zcj****其实是用一个用户在2个浏览器上的数据，我们是否可以只保留一份****——Data数据，多分_Internal数据（用与表示到***_Data数据的关联）。

demo如下：

  public class BaseController : Controller
    {
        string cookieName;
        public BaseController()
        {
            cookieName = SessionStateManage.CookieName;
            
            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookieName];
            if (cookie != null)
            {
                SessionCookieValue = cookie.Value;
                if (string.IsNullOrEmpty(SessionCookieValue))
                {
                    UserSession = SessionStateManage.GetUser(SessionCookieValue);
                }
            }

        }

        public void Login(UserInfo info)
        {
            string sessionID = Guid.NewGuid().ToString();
            System.Web.HttpContext.Current.Response.Cookies.Set(new HttpCookie(cookieName, sessionID));
            SessionStateManage.SetLogin(sessionID, info);
        }
        public string SessionCookieValue { set; get; }

        public UserInfo UserSession { set; get; }
    }

 public class HomeController : BaseController
    {
        public ActionResult Index()
        {         
            if (UserSession == null)
            {
                UserSession = new UserInfo { Email = "gavin@test", Password = "123", UserID = "1", UserName = "gavin" };
                Login(UserSession);
            }
            return View();
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }

从当前请求中获取cookie，如果有就加载用户信息，如果没有我们在用户登录的时候除了写Redis还需要给浏览器写上cookie。

  public class UserInfo
    {
        public string UserID { set; get; }
        public string UserName { set; get; }
        public string Password { set; get; }
        public string Email { set; get; }
    }
    public class SessionStateManage
    {
        static RedisHelper Redis;
        static SessionStateManage()
        {
            CookieName = ConfigurationManager.AppSettings["cookieName"] ?? "SESSION_ID";
            ApplicationName = ConfigurationManager.AppSettings["ApplicationName"] ?? "SESSION";

            Redis = new RedisHelper(1);

            Redis.SetSysCustomKey(ApplicationName);
            string sessionTimeOutStr = ConfigurationManager.AppSettings["SessionTimeOut"] ?? "20";
            SessionTimeOut = int.Parse(sessionTimeOutStr);
        }
        #region Property

        public static string CookieName { get; private set; }

        public static string ApplicationName { get; private set; }


        public static int SessionTimeOut { get; private set; }
        #endregion

        public static void SetLogin(string cookieName, UserInfo user)
        {
            Redis.StringSet(cookieName, user.UserID);
            Redis.KeyExpire(cookieName, new TimeSpan(0, SessionTimeOut, 0));

            Redis.HashSet(user.UserID, user);
        }

        public static UserInfo GetUser(string cookinNme)
        {
            string userID = Redis.StringGet(cookinNme);
            return userID == null ? null : Redis.HashGet<UserInfo>(userID);
        }

    }

用户的session过期直接用redis里面key的过期时间。redis操作需要辅助类如下：

/// <summary>
    /// ConnectionMultiplexer对象管理帮助类
    /// </summary>
    public static class RedisConnectionHelp
    {
        //系统自定义Key前缀
        public static readonly string SysCustomKey = ConfigurationManager.AppSettings["redisKey"] ?? "";

        //"127.0.0.1:6379,allowadmin=true
        private static readonly string RedisConnectionString = ConfigurationManager.ConnectionStrings["RedisExchangeHosts"].ConnectionString;

        private static readonly object Locker = new object();
        private static ConnectionMultiplexer _instance;
        private static readonly ConcurrentDictionary<string, ConnectionMultiplexer> ConnectionCache = new ConcurrentDictionary<string, ConnectionMultiplexer>();

        /// <summary>
        /// 单例获取
        /// </summary>
        public static ConnectionMultiplexer Instance
        {
            get
            {
                if (_instance == null)
                {
                    lock (Locker)
                    {
                        if (_instance == null || !_instance.IsConnected)
                        {
                            _instance = GetManager();
                        }
                    }
                }
                return _instance;
            }
        }

        /// <summary>
        /// 缓存获取
        /// </summary>
        /// <param name="connectionString"></param>
        /// <returns></returns>
        public static ConnectionMultiplexer GetConnectionMultiplexer(string connectionString)
        {
            if (!ConnectionCache.ContainsKey(connectionString))
            {
                ConnectionCache[connectionString] = GetManager(connectionString);
            }
            return ConnectionCache[connectionString];
        }

        private static ConnectionMultiplexer GetManager(string connectionString = null)
        {
            connectionString = connectionString ?? RedisConnectionString;
            var connect = ConnectionMultiplexer.Connect(connectionString);

            //注册如下事件
            connect.ConnectionFailed += MuxerConnectionFailed;
            connect.ConnectionRestored += MuxerConnectionRestored;
            connect.ErrorMessage += MuxerErrorMessage;
            connect.ConfigurationChanged += MuxerConfigurationChanged;
            connect.HashSlotMoved += MuxerHashSlotMoved;
            connect.InternalError += MuxerInternalError;

            return connect;
        }

        #region 事件

        /// <summary>
        /// 配置更改时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConfigurationChanged(object sender, EndPointEventArgs e)
        {
            Console.WriteLine("Configuration changed: " + e.EndPoint);
        }

        /// <summary>
        /// 发生错误时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerErrorMessage(object sender, RedisErrorEventArgs e)
        {
            Console.WriteLine("ErrorMessage: " + e.Message);
        }

        /// <summary>
        /// 重新建立连接之前的错误
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConnectionRestored(object sender, ConnectionFailedEventArgs e)
        {
            Console.WriteLine("ConnectionRestored: " + e.EndPoint);
        }

        /// <summary>
        /// 连接失败 ， 如果重新连接成功你将不会收到这个通知
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerConnectionFailed(object sender, ConnectionFailedEventArgs e)
        {
            Console.WriteLine("重新连接：Endpoint failed: " + e.EndPoint + ", " + e.FailureType + (e.Exception == null ? "" : (", " + e.Exception.Message)));
        }

        /// <summary>
        /// 更改集群
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerHashSlotMoved(object sender, HashSlotMovedEventArgs e)
        {
            Console.WriteLine("HashSlotMoved:NewEndPoint" + e.NewEndPoint + ", OldEndPoint" + e.OldEndPoint);
        }

        /// <summary>
        /// redis类库错误
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void MuxerInternalError(object sender, InternalErrorEventArgs e)
        {
            Console.WriteLine("InternalError:Message" + e.Exception.Message);
        }

        #endregion 事件
    }

  /// <summary>
    /// Redis操作
    /// </summary>
    public class RedisHelper
    {
        private int DbNum { get; }
        private readonly ConnectionMultiplexer _conn;
        public string CustomKey;

        #region 构造函数

        public RedisHelper(int dbNum = 0)
                : this(dbNum, null)
        {
        }

        public RedisHelper(int dbNum, string readWriteHosts)
        {
            DbNum = dbNum;
            _conn =
                string.IsNullOrWhiteSpace(readWriteHosts) ?
                RedisConnectionHelp.Instance :
                RedisConnectionHelp.GetConnectionMultiplexer(readWriteHosts);
        }

        #endregion 构造函数

        #region String

        #region 同步方法

        /// <summary>
        /// 保存单个key value
        /// </summary>
        /// <param name="key">Redis Key</param>
        /// <param name="value">保存的值</param>
        /// <param name="expiry">过期时间</param>
        /// <returns></returns>
        public bool StringSet(string key, string value, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringSet(key, value, expiry));
        }

        /// <summary>
        /// 保存多个key value
        /// </summary>
        /// <param name="keyValues">键值对</param>
        /// <returns></returns>
        public bool StringSet(List<KeyValuePair<RedisKey, RedisValue>> keyValues)
        {
            List<KeyValuePair<RedisKey, RedisValue>> newkeyValues =
                keyValues.Select(p => new KeyValuePair<RedisKey, RedisValue>(AddSysCustomKey(p.Key), p.Value)).ToList();
            return Do(db => db.StringSet(newkeyValues.ToArray()));
        }

        /// <summary>
        /// 保存一个对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="obj"></param>
        /// <param name="expiry"></param>
        /// <returns></returns>
        public bool StringSet<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            string json = ConvertJson(obj);
            return Do(db => db.StringSet(key, json, expiry));
        }

        /// <summary>
        /// 获取单个key的值
        /// </summary>
        /// <param name="key">Redis Key</param>
        /// <returns></returns>
        public string StringGet(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringGet(key));
        }

        /// <summary>
        /// 获取多个Key
        /// </summary>
        /// <param name="listKey">Redis Key集合</param>
        /// <returns></returns>
        public RedisValue[] StringGet(List<string> listKey)
        {
            List<string> newKeys = listKey.Select(AddSysCustomKey).ToList();
            return Do(db => db.StringGet(ConvertRedisKeys(newKeys)));
        }

        /// <summary>
        /// 获取一个key的对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public T StringGet<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => ConvertObj<T>(db.StringGet(key)));
        }

        /// <summary>
        /// 为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负</param>
        /// <returns>增长后的值</returns>
        public double StringIncrement(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringIncrement(key, val));
        }

        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负</param>
        /// <returns>减少后的值</returns>
        public double StringDecrement(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.StringDecrement(key, val));
        }

        #endregion 同步方法

        #region 异步方法

        /// <summary>
        /// 保存单个key value
        /// </summary>
        /// <param name="key">Redis Key</param>
        /// <param name="value">保存的值</param>
        /// <param name="expiry">过期时间</param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync(string key, string value, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringSetAsync(key, value, expiry));
        }

        /// <summary>
        /// 保存多个key value
        /// </summary>
        /// <param name="keyValues">键值对</param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync(List<KeyValuePair<RedisKey, RedisValue>> keyValues)
        {
            List<KeyValuePair<RedisKey, RedisValue>> newkeyValues =
                keyValues.Select(p => new KeyValuePair<RedisKey, RedisValue>(AddSysCustomKey(p.Key), p.Value)).ToList();
            return await Do(db => db.StringSetAsync(newkeyValues.ToArray()));
        }

        /// <summary>
        /// 保存一个对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="obj"></param>
        /// <param name="expiry"></param>
        /// <returns></returns>
        public async Task<bool> StringSetAsync<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            string json = ConvertJson(obj);
            return await Do(db => db.StringSetAsync(key, json, expiry));
        }

        /// <summary>
        /// 获取单个key的值
        /// </summary>
        /// <param name="key">Redis Key</param>
        /// <returns></returns>
        public async Task<string> StringGetAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringGetAsync(key));
        }

        /// <summary>
        /// 获取多个Key
        /// </summary>
        /// <param name="listKey">Redis Key集合</param>
        /// <returns></returns>
        public async Task<RedisValue[]> StringGetAsync(List<string> listKey)
        {
            List<string> newKeys = listKey.Select(AddSysCustomKey).ToList();
            return await Do(db => db.StringGetAsync(ConvertRedisKeys(newKeys)));
        }

        /// <summary>
        /// 获取一个key的对象
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<T> StringGetAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            string result = await Do(db => db.StringGetAsync(key));
            return ConvertObj<T>(result);
        }

        /// <summary>
        /// 为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负</param>
        /// <returns>增长后的值</returns>
        public async Task<double> StringIncrementAsync(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringIncrementAsync(key, val));
        }

        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="val">可以为负</param>
        /// <returns>减少后的值</returns>
        public async Task<double> StringDecrementAsync(string key, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.StringDecrementAsync(key, val));
        }

        #endregion 异步方法

        #endregion String

        #region Hash

        #region 同步方法

        /// <summary>
        /// 判断某个数据是否已经被缓存
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public bool HashExists(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashExists(key, dataKey));
        }

        /// <summary>
        /// 存储数据到hash表
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public bool HashSet<T>(string key, string dataKey, T t)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                string json = ConvertJson(t);
                return db.HashSet(key, dataKey, json);
            });
        }

        public bool HashSet<T>(string key, T t)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                var val = ToHash<T>(t);
                db.HashSet(key, val);
                return true;
            });
        }
        /// <summary>
        /// 移除hash中的某值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public bool HashDelete(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashDelete(key, dataKey));
        }

        /// <summary>
        /// 移除hash中的多个值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKeys"></param>
        /// <returns></returns>
        public long HashDelete(string key, List<RedisValue> dataKeys)
        {
            key = AddSysCustomKey(key);
            //List<RedisValue> dataKeys1 = new List<RedisValue>() {"1","2"};
            return Do(db => db.HashDelete(key, dataKeys.ToArray()));
        }

        /// <summary>
        /// 从hash表获取数据
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public T HashGet<T>(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                string value = db.HashGet(key, dataKey);
                return ConvertObj<T>(value);
            });
        }

        public T HashGet<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                var value = db.HashGetAll(key);
                return ToEntity<T>(value);
            });
        }
        /// <summary>
        /// 为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="val">可以为负</param>
        /// <returns>增长后的值</returns>
        public double HashIncrement(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashIncrement(key, dataKey, val));
        }

        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="val">可以为负</param>
        /// <returns>减少后的值</returns>
        public double HashDecrement(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.HashDecrement(key, dataKey, val));
        }

        /// <summary>
        /// 获取hashkey所有Redis key
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public List<T> HashKeys<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                RedisValue[] values = db.HashKeys(key);
                return ConvetList<T>(values);
            });
        }

        #endregion 同步方法

        #region 异步方法

        /// <summary>
        /// 判断某个数据是否已经被缓存
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public async Task<bool> HashExistsAsync(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashExistsAsync(key, dataKey));
        }

        /// <summary>
        /// 存储数据到hash表
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="t"></param>
        /// <returns></returns>
        public async Task<bool> HashSetAsync<T>(string key, string dataKey, T t)
        {
            key = AddSysCustomKey(key);
            return await Do(db =>
            {
                string json = ConvertJson(t);
                return db.HashSetAsync(key, dataKey, json);
            });
        }

        /// <summary>
        /// 移除hash中的某值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public async Task<bool> HashDeleteAsync(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashDeleteAsync(key, dataKey));
        }

        /// <summary>
        /// 移除hash中的多个值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKeys"></param>
        /// <returns></returns>
        public async Task<long> HashDeleteAsync(string key, List<RedisValue> dataKeys)
        {
            key = AddSysCustomKey(key);
            //List<RedisValue> dataKeys1 = new List<RedisValue>() {"1","2"};
            return await Do(db => db.HashDeleteAsync(key, dataKeys.ToArray()));
        }

        /// <summary>
        /// 从hash表获取数据
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <returns></returns>
        public async Task<T> HashGeAsync<T>(string key, string dataKey)
        {
            key = AddSysCustomKey(key);
            string value = await Do(db => db.HashGetAsync(key, dataKey));
            return ConvertObj<T>(value);
        }

        /// <summary>
        /// 为数字增长val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="val">可以为负</param>
        /// <returns>增长后的值</returns>
        public async Task<double> HashIncrementAsync(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashIncrementAsync(key, dataKey, val));
        }

        /// <summary>
        /// 为数字减少val
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dataKey"></param>
        /// <param name="val">可以为负</param>
        /// <returns>减少后的值</returns>
        public async Task<double> HashDecrementAsync(string key, string dataKey, double val = 1)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.HashDecrementAsync(key, dataKey, val));
        }

        /// <summary>
        /// 获取hashkey所有Redis key
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<List<T>> HashKeysAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            RedisValue[] values = await Do(db => db.HashKeysAsync(key));
            return ConvetList<T>(values);
        }

        #endregion 异步方法

        #endregion Hash

        #region List

        #region 同步方法

        /// <summary>
        /// 移除指定ListId的内部List的值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void ListRemove<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListRemove(key, ConvertJson(value)));
        }

        /// <summary>
        /// 获取指定key的List
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public List<T> ListRange<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis =>
            {
                var values = redis.ListRange(key);
                return ConvetList<T>(values);
            });
        }

        /// <summary>
        /// 入队
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void ListRightPush<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListRightPush(key, ConvertJson(value)));
        }

        /// <summary>
        /// 出队
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public T ListRightPop<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                var value = db.ListRightPop(key);
                return ConvertObj<T>(value);
            });
        }

        /// <summary>
        /// 入栈
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public void ListLeftPush<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            Do(db => db.ListLeftPush(key, ConvertJson(value)));
        }

        /// <summary>
        /// 出栈
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public T ListLeftPop<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db =>
            {
                var value = db.ListLeftPop(key);
                return ConvertObj<T>(value);
            });
        }

        /// <summary>
        /// 获取集合中的数量
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public long ListLength(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.ListLength(key));
        }

        #endregion 同步方法

        #region 异步方法

        /// <summary>
        /// 移除指定ListId的内部List的值
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public async Task<long> ListRemoveAsync<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListRemoveAsync(key, ConvertJson(value)));
        }

        /// <summary>
        /// 获取指定key的List
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<List<T>> ListRangeAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            var values = await Do(redis => redis.ListRangeAsync(key));
            return ConvetList<T>(values);
        }

        /// <summary>
        /// 入队
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public async Task<long> ListRightPushAsync<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListRightPushAsync(key, ConvertJson(value)));
        }

        /// <summary>
        /// 出队
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<T> ListRightPopAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            var value = await Do(db => db.ListRightPopAsync(key));
            return ConvertObj<T>(value);
        }

        /// <summary>
        /// 入栈
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public async Task<long> ListLeftPushAsync<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(db => db.ListLeftPushAsync(key, ConvertJson(value)));
        }

        /// <summary>
        /// 出栈
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<T> ListLeftPopAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            var value = await Do(db => db.ListLeftPopAsync(key));
            return ConvertObj<T>(value);
        }

        /// <summary>
        /// 获取集合中的数量
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<long> ListLengthAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.ListLengthAsync(key));
        }

        #endregion 异步方法

        #endregion List

        #region SortedSet 有序集合

        #region 同步方法

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="score"></param>
        public bool SortedSetAdd<T>(string key, T value, double score)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetAdd(key, ConvertJson<T>(value), score));
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public bool SortedSetRemove<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetRemove(key, ConvertJson(value)));
        }

        /// <summary>
        /// 获取全部
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public List<T> SortedSetRangeByRank<T>(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis =>
            {
                var values = redis.SortedSetRangeByRank(key);
                return ConvetList<T>(values);
            });
        }

        /// <summary>
        /// 获取集合中的数量
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public long SortedSetLength(string key)
        {
            key = AddSysCustomKey(key);
            return Do(redis => redis.SortedSetLength(key));
        }

        #endregion 同步方法

        #region 异步方法

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="score"></param>
        public async Task<bool> SortedSetAddAsync<T>(string key, T value, double score)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetAddAsync(key, ConvertJson<T>(value), score));
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        public async Task<bool> SortedSetRemoveAsync<T>(string key, T value)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetRemoveAsync(key, ConvertJson(value)));
        }

        /// <summary>
        /// 获取全部
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<List<T>> SortedSetRangeByRankAsync<T>(string key)
        {
            key = AddSysCustomKey(key);
            var values = await Do(redis => redis.SortedSetRangeByRankAsync(key));
            return ConvetList<T>(values);
        }

        /// <summary>
        /// 获取集合中的数量
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public async Task<long> SortedSetLengthAsync(string key)
        {
            key = AddSysCustomKey(key);
            return await Do(redis => redis.SortedSetLengthAsync(key));
        }

        #endregion 异步方法

        #endregion SortedSet 有序集合

        #region key

        /// <summary>
        /// 删除单个key
        /// </summary>
        /// <param name="key">redis key</param>
        /// <returns>是否删除成功</returns>
        public bool KeyDelete(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyDelete(key));
        }

        /// <summary>
        /// 删除多个key
        /// </summary>
        /// <param name="keys">rediskey</param>
        /// <returns>成功删除的个数</returns>
        public long KeyDelete(List<string> keys)
        {
            List<string> newKeys = keys.Select(AddSysCustomKey).ToList();
            return Do(db => db.KeyDelete(ConvertRedisKeys(newKeys)));
        }

        /// <summary>
        /// 判断key是否存储
        /// </summary>
        /// <param name="key">redis key</param>
        /// <returns></returns>
        public bool KeyExists(string key)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyExists(key));
        }

        /// <summary>
        /// 重新命名key
        /// </summary>
        /// <param name="key">就的redis key</param>
        /// <param name="newKey">新的redis key</param>
        /// <returns></returns>
        public bool KeyRename(string key, string newKey)
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyRename(key, newKey));
        }

        /// <summary>
        /// 设置Key的时间
        /// </summary>
        /// <param name="key">redis key</param>
        /// <param name="expiry"></param>
        /// <returns></returns>
        public bool KeyExpire(string key, TimeSpan? expiry = default(TimeSpan?))
        {
            key = AddSysCustomKey(key);
            return Do(db => db.KeyExpire(key, expiry));
        }

        #endregion key

        #region 发布订阅

        /// <summary>
        /// Redis发布订阅  订阅
        /// </summary>
        /// <param name="subChannel"></param>
        /// <param name="handler"></param>
        public void Subscribe(string subChannel, Action<RedisChannel, RedisValue> handler = null)
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.Subscribe(subChannel, (channel, message) =>
            {
                if (handler == null)
                {
                    Console.WriteLine(subChannel + " 订阅收到消息：" + message);
                }
                else
                {
                    handler(channel, message);
                }
            });
        }

        /// <summary>
        /// Redis发布订阅  发布
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="channel"></param>
        /// <param name="msg"></param>
        /// <returns></returns>
        public long Publish<T>(string channel, T msg)
        {
            ISubscriber sub = _conn.GetSubscriber();
            return sub.Publish(channel, ConvertJson(msg));
        }

        /// <summary>
        /// Redis发布订阅  取消订阅
        /// </summary>
        /// <param name="channel"></param>
        public void Unsubscribe(string channel)
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.Unsubscribe(channel);
        }

        /// <summary>
        /// Redis发布订阅  取消全部订阅
        /// </summary>
        public void UnsubscribeAll()
        {
            ISubscriber sub = _conn.GetSubscriber();
            sub.UnsubscribeAll();
        }

        #endregion 发布订阅

        #region 其他

        public ITransaction CreateTransaction()
        {
            return GetDatabase().CreateTransaction();
        }

        public IDatabase GetDatabase()
        {
            return _conn.GetDatabase(DbNum);
        }

        public IServer GetServer(string hostAndPort)
        {
            return _conn.GetServer(hostAndPort);
        }

        /// <summary>
        /// 设置前缀
        /// </summary>
        /// <param name="customKey"></param>
        public void SetSysCustomKey(string customKey)
        {
            CustomKey = customKey;
        }

        #endregion 其他

        #region 辅助方法

        private string AddSysCustomKey(string oldKey)
        {
            var prefixKey = CustomKey ?? RedisConnectionHelp.SysCustomKey;
            return prefixKey + oldKey;
        }

        private T Do<T>(Func<IDatabase, T> func)
        {
            var database = _conn.GetDatabase(DbNum);
            return func(database);
        }

        private string ConvertJson<T>(T value)
        {
            string result = value is string ? value.ToString() : JsonConvert.SerializeObject(value);
            return result;
        }

        private T ConvertObj<T>(RedisValue value)
        {
            return JsonConvert.DeserializeObject<T>(value);
        }

        private List<T> ConvetList<T>(RedisValue[] values)
        {
            List<T> result = new List<T>();
            foreach (var item in values)
            {
                var model = ConvertObj<T>(item);
                result.Add(model);
            }
            return result;
        }

        private RedisKey[] ConvertRedisKeys(List<string> redisKeys)
        {
            return redisKeys.Select(redisKey => (RedisKey)redisKey).ToArray();
        }
        static HashEntry[] ToHash<T>(T obj, bool isIncludNull = false)
        {
            PropertyInfo[] properties = obj.GetType().GetProperties();

            return isIncludNull
                ? properties.Select(x =>
                {
                    var tempValue = x.GetValue(obj);
                    return new HashEntry(x.Name, tempValue == null ? string.Empty : tempValue.ToString());
                }).ToArray()
                : properties.Where(x => x.GetValue(obj) != null).Select(x => new HashEntry(x.Name, x.GetValue(obj).ToString())).ToArray();
        }

        static T ToEntity<T>(HashEntry[] hashEntries)
        {
            Type t = typeof(T);
            PropertyInfo[] properties = t.GetProperties();
            var obj = Activator.CreateInstance(typeof(T));
            foreach (var property in properties)
            {
                HashEntry entry = hashEntries.FirstOrDefault(g => g.Name.ToString().Equals(property.Name));
                if (entry.Equals(new HashEntry())) continue;

                object value = null;
                if (!property.PropertyType.IsGenericType)
                {
                    value = Convert.ChangeType(entry.Value.ToString(), property.PropertyType);
                }
                else
                {
                    Type genericTypeDefinition = property.PropertyType.GetGenericTypeDefinition();
                    if (genericTypeDefinition == typeof(Nullable<>))
                    {
                        if (entry.Value.HasValue)
                        {
                            value = Convert.ChangeType(entry.Value.ToString(), Nullable.GetUnderlyingType(property.PropertyType));
                        }
                    }
                }

                property.SetValue(obj, value);
            }
            return (T)obj;
        }

        #endregion 辅助方法
    }

增加的配置文件

 <connectionStrings> 
    <add name="RedisExchangeHosts" connectionString="127.0.0.1:6379,abortConnect=false,connectRetry=3,connectTimeout=3000,defaultDatabase=0,syncTimeout=3000,version=3.2.1,responseTimeout=3000" />
  </connectionStrings>
  <appSettings>

    <add key="cookieName" value="gavintest" />
    <add key="ApplicationName" value="CustStateDemo" />
    <add key="SessionTimeOut" value="20" />
  </appSettings>

运行效果:

CustStateDemo1是我真正的数据，CustStateDemo451c3163-7586-494d-b331-89bae1045ba0和其他2个一样 数据都是指向CustStateDemo1的数据。