ObjectCache缓存

 /// <summary>

   ///缓存操作类

     /// </summary>

    public class Cache 

  {

       private static List<string> _allUseCacheKey = new List<string>();  

    private static ObjectCache _cache = MemoryCache.Default; 

      /// <summary>     

      ///添加缓存     

     /// </summary>     

      /// <param name="key">Key 唯一</param>        

     /// <param name="value">值</param>     

      /// <param name="cacheOffset">超时时间</param>

 public static void Add(string key, object value, DateTimeOffset cacheOffset)

  {

           if (_allUseCacheKey.Contains(key))

   {

             Remove(key);

 }

            _allUseCacheKey.Add(key);

         _cache.Add(key, value, cacheOffset);

  }

          /// <summary>

          ///移除缓存

         /// </summary>

         /// <param name="key">Key</param>

         public static void Remove(string key)

         {

             if (_allUseCacheKey.Contains(key))

             {

                 _allUseCacheKey.Remove(key);

             }

             _cache.Remove(key);

         }

         /// <summary>

         ///读取缓存

         /// </summary>

         /// <param name="key">Key</param>

         /// <returns></returns>

         public static object Read(string key)

         {

             if (_allUseCacheKey.Contains(key))

                 return _cache[key];

             return null;

         }

          /// <summary>

         ///清除所有缓存

         /// </summary>

         public static void Clear()

         {

             foreach (string value in _allUseCacheKey)

             {

                 _cache.Remove(value);

             }

             _allUseCacheKey.Clear();

         }

     }

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