Memcached 使用备注

 

ICSharpCode.SharpZipLib未能加载文件或程序集

Memcached使用的是0.84版本的dll,vs2013带的是0.86版本

在web.config中<runtime><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">节加入以下节点

      <dependentAssembly>
        <assemblyIdentity name="ICSharpCode.SharpZipLib" publicKeyToken="1B03E6ACF1164F73" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-0.86.0.518" newVersion="0.86.0.518" />
      </dependentAssembly>

未标记为可序列化。

为所有要缓存的对象加可序列化属性太麻烦,需要对进行再次封装

        /// <summary>
        /// 向缓存服务器写入数据
        /// </summary>
        /// <param name="key">key</param>
        /// <param name="value">数据</param>
        /// <param name="seconds">缓存时间 </param>
        /// <returns></returns>
        public static bool SetData(string key, object value, int seconds)
        {
            string jsonString = JsonConvert.SerializeObject(value);
            return MemcacheHelper.Set(key, jsonString, DateTime.Now.AddSeconds(seconds));
        }

        /// <summary>
        /// 从服务器读取数据
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="key">key</param>
        /// <returns></returns>
        public static T GetData<T>(string key)
        {
            object obj = MemcacheHelper.Get(key);
            if (obj == null)
                return default(T);
            return JsonConvert.DeserializeObject<T>(obj.ToString());
        }

 使用上面的方法可能会导致复杂的集合类无法反序列化成功,报Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type .....错误

尝试将写入方法改为

        /// <summary>
        /// 向缓存服务器写入数据
        /// </summary>
        /// <param name="key">key</param>
        /// <param name="value">数据</param>
        /// <param name="seconds">缓存时间 </param>
        /// <returns></returns>
        public static bool SetData<T>(string key, T value, int seconds)
        {
            if (value == null)
                return false;
            string jsonString = JsonConvert.SerializeObject(value);
            return MemcacheHelper.Set(key, jsonString, DateTime.Now.AddSeconds(seconds));
        }

反序列化失败是偶尔出现,以待后测