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vs2010--缓存类

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//.net 4.0 重写缓存类(拓展) using System.Web.Caching; public class InMemoryOutputCacheProvider : OutputCacheProvider { #region Members private Dictionarystring, InMemoryOutputCacheItem _cache = new Dictionarystring, InMemoryOutpu



//.net 4.0  重写缓存类(拓展)
using System.Web.Caching;

public class InMemoryOutputCacheProvider : OutputCacheProvider
{
#region Members
private Dictionary<string, InMemoryOutputCacheItem> _cache = new Dictionary<string, InMemoryOutputCacheItem>();
private readonly static object _syncLock = new object();
#endregion

#region Methods
public override object Add(string key, object entry, DateTime utcExpiry)
{
Set(key, entry, utcExpiry);
return entry;
}

public override object Get(string key)
{
InMemoryOutputCacheItem item = null;
if (_cache.TryGetValue(key, out item))
{
if (item.UtcExpiry < DateTime.UtcNow)
{
Remove(key);
return null;
}
return item.Value;
}
return null;
}

public override void Remove(string key)
{
InMemoryOutputCacheItem item = null;
if (_cache.TryGetValue(key, out item))
{
_cache.Remove(key);
}
}

public override void Set(string key, object entry, DateTime utcExpiry)
{
var item = new InMemoryOutputCacheItem(entry, utcExpiry);
lock (_syncLock)
{
if (_cache.ContainsKey(key))
{
_cache[key] = item;
}
else
{
_cache.Add(key, item);
}
}
}

#endregion
}



public class InMemoryOutputCacheItem
{
#region Members

public DateTime UtcExpiry { get; set; }
public object Value { get; set; }

#endregion

#region Ctor

public InMemoryOutputCacheItem(object value, DateTime utcExpiry)
{
Value = value;
UtcExpiry = utcExpiry;
}

#endregion
}

//配置

<caching>
<outputCache defaultProvider="InMemory">
<providers>
<add name="InMemory" type="InMemoryOutputCacheProvider"/>
</providers>
</outputCache>
</caching>



//页面

<%@ OutputCache Duration="15" VaryByParam="*" %>







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