StackExchange.Redis 之 String 类型示例

string类型很简单，就不做示例演示了，这里只贴出helper类

        /// <summary>
        /// 判断key是否存在
        /// </summary>
        /// <param name="key"></param>
        /// <param name="db"></param>
        /// <returns></returns>
        public bool keyexists(string key, int db = -1)
        {
            try
            {
                _db = getdatabase(db);
                return keyexists(key);
            }
            catch (exception)
            {
                throw;
            }
        }

        /// <summary>
        /// 根据key 移除缓存  
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public bool remove(string key, int db = -1)
        {
            try
            {
                if ((object)key == null)
                    return false;
                _db = getdatabase(db);
                return keydelete(key);
            }
            catch (exception ex)
            {
                _log.fatal("移除:{0}异常:{1}", key, ex.message);
                throw;
            }
        }


        /// <summary>
        /// 写入缓存数据
        /// </summary>
        /// <typeparam name="t">类型</typeparam>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <param name="span">有效期</param>
        /// <returns></returns>
        public bool set<t>(string key, t value, timespan span, int db = -1)
        {
            try
            {
                if ((object)key == null || value == null)
                    return false;

                _db = getdatabase(db);
                if (value != null && (object)value is string)
                {
                    return stringset(key, value.tostring(), span);
                }
                return stringset<t>(key, value, span);
            }
            catch (exception ex)
            {
                _log.fatal("{0}key写入value:{1}失败,异常原因:{2}", key, value, ex.message);
                throw;
            }
        }

        /// <summary>
        /// 读取缓存数据  返回实体
        /// </summary>
        /// <typeparam name="t"></typeparam>
        /// <param name="key"></param>
        /// <returns></returns>
        public t get<t>(string key, int db = -1)
        {
            try
            {
                _db = getdatabase(db);
                return stringget<t>(key);
            }
            catch (exception)
            {
                throw;
            }
        }

        /// <summary>
        /// 读取缓存数据 返回字符串
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string get(string key, int db = -1)
        {
            try
            {
                _db = getdatabase(db);
                return stringget(key);
            }
            catch (exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 递增
        /// </summary>
        /// <param name="key"></param>
        /// <param name="span"></param>
        /// <param name="db"></param>
        /// <returns></returns>
        public long increment(string key, timespan span, int db = -1)
        {
            try
            {
                _db = getdatabase(db);
                var result = this.stringincr(key);
                //设置过期时间
                this.keyexpire(key, span);
                return result;
            }
            catch (exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 递减
        /// </summary>
        /// <param name="key"></param>
        /// <param name="span"></param>
        /// <param name="db"></param>
        /// <returns></returns>
        public long decrement(string key, timespan span, int db = -1)
        {
            try
            {
                _db = getdatabase(db);
                var result = this.stringdecr(key);
                //设置过期时间
                this.keyexpire(key, span);
                return result;
            }
            catch (exception)
            {

                throw;
            }
        }