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  • 简单使用Enterprise Library 5.0 中的Cache功能

    1. 首先使用Configuration Console, 在blocks里面 Add Caching Setteings. 设置一些参数,比如Expiration Polling Frequency(seconds), 这个是指每隔指定的时间,cache block会检查那些过期的cache item,并且把他们删除掉。

    2. 配置好以后可以保存为一个config文件,然后把config内容拷贝到你的project中的配置文件中。

      <configSections>
        <section name="cachingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Caching.Configuration.CacheManagerSettings, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" />
      </configSections>
      <cachingConfiguration defaultCacheManager="Data Cache Manager">
        <cacheManagers>
          <add name="Data Cache Manager" type="Microsoft.Practices.EnterpriseLibrary.Caching.CacheManager, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
              expirationPollFrequencyInSeconds="3600" maximumElementsInCacheBeforeScavenging="1000"
              numberToRemoveWhenScavenging="10" backingStoreName="NullBackingStore" />
        </cacheManagers>
        <backingStores>
          <add type="Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.NullBackingStore, Microsoft.Practices.EnterpriseLibrary.Caching, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
              name="NullBackingStore" />
        </backingStores>
      </cachingConfiguration>

    3. 在你的project中引入一些dll。

    Microsoft.Practices.EnterpriseLibrary.Caching.dll
    Microsoft.Practices.EnterpriseLibrary.Caching.Cryptography.dll
    Microsoft.Practices.EnterpriseLibrary.Caching.Database.dll
    Microsoft.Practices.EnterpriseLibrary.Data.dll
    Microsoft.Practices.EnterpriseLibrary.Security.Cryptography.dll

    4. 现在就可以使用cache了,下面的是一个简单的使用cache功能的方法。

     private Instance GetInstanceCache(string guid)
            {
                Instance ins = null;
                string key = "INS" + guid;
                ICacheManager defaultCache = EnterpriseLibraryContainer.Current.GetInstance<ICacheManager>();
                if (defaultCache.Contains(key))
                {
                    object cache = defaultCache.GetData(key);
                    if (cache != null)
                    {
                        ins = cache as Instance;
                    }
                    else
                    {
                        ins = BLInstance.GetInstanceByGuid(guid);
                        defaultCache.Remove(key);
                        defaultCache.Add(key, ins, CacheItemPriority.High, null, new SlidingTime(new TimeSpan(int.Parse(ConfigurationManager.AppSettings["ExpirationTimeHours"]), int.Parse(ConfigurationManager.AppSettings["ExpirationTimeMinutes"]), int.Parse(ConfigurationManager.AppSettings["ExpirationTimeSeconds"]))));
                    }
                }
                else
                {
                    ins = BLInstance.GetInstanceByGuid(guid);
                    defaultCache.Add(key, ins, CacheItemPriority.High, null, new SlidingTime(new TimeSpan(int.Parse(ConfigurationManager.AppSettings["ExpirationTimeHours"]), int.Parse(ConfigurationManager.AppSettings["ExpirationTimeMinutes"]), int.Parse(ConfigurationManager.AppSettings["ExpirationTimeSeconds"]))));
                }

                return ins;
            }

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  • 原文地址:https://www.cnblogs.com/lzjsky/p/2103963.html
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