StackExchange.Redis 之 String 類型示例

String類型很簡單，就不做示例演示了，這裡只貼出Helper類

        /// <summary>
        /// 判斷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>
        /// 根據key 移除緩存  
        /// </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}異常:{1}", key, ex.Message);
                throw;
            }
        }


        /// <summary>
        /// 寫入緩存數據
        /// </summary>
        /// <typeparam name="T">類型</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寫入value:{1}失敗,異常原因:{2}", key, value, ex.Message);
                throw;
            }
        }

        /// <summary>
        /// 讀取緩存數據  返回實體
        /// </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>
        /// 讀取緩存數據 返回字元串
        /// </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>
        /// 遞增
        /// </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);
                //設置過期時間
                this.KeyExpire(key, span);
                return result;
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// 遞減
        /// </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);
                //設置過期時間
                this.KeyExpire(key, span);
                return result;
            }
            catch (Exception)
            {

                throw;
            }
        }