net 4.0 重写缓存类代码,CSharp代码库,德仔网

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【CSharp】 net 4.0 重写缓存类
作者:Dezai.CN / 发布于2011/3/15/ 815
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<pre class="code"><font face="微软雅黑"><font size="2"><span style="color: green">//.net 4.0  重写缓存类（拓展）
</span><span style="color: blue">using </span>System.Web.Caching;

<span style="color: blue">public class </span><span style="color: rgb(43,145,175)">InMemoryOutputCacheProvider </span>: </font></font><font face="微软雅黑"><font size="2"><span style="color: rgb(43,145,175)">OutputCacheProvider
</span>{  
    <span style="color: blue">#region </span>Members   
    <span style="color: blue">private </span><span style="color: rgb(43,145,175)">Dictionary</span><<span style="color: blue">string</span>, <span style="color: rgb(43,145,175)">InMemoryOutputCacheItem</span>> _cache = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">Dictionary</span><<span style="color: blue">string</span>, <span style="color: rgb(43,145,175)">InMemoryOutputCacheItem</span>>();  
    <span style="color: blue">private readonly static object </span>_syncLock = <span style="color: blue">new object</span>();  
    </font></font><font face="微软雅黑"><font size="2"><span style="color: blue">#endregion   

    #region </span>Methods  
    <span style="color: blue">public override object </span>Add(<span style="color: blue">string </span>key, <span style="color: blue">object </span>entry, <span style="color: rgb(43,145,175)">DateTime </span>utcExpiry) 
    {   
        Set(key, entry, utcExpiry); 
        <span style="color: blue">return </span>entry;
    }  

    <span style="color: blue">public override object </span>Get(<span style="color: blue">string </span>key) 
    {   
        <span style="color: rgb(43,145,175)">InMemoryOutputCacheItem </span>item = <span style="color: blue">null</span>;   
        <span style="color: blue">if </span>(_cache.TryGetValue(key, <span style="color: blue">out </span>item))   
        {    
            <span style="color: blue">if </span>(item.UtcExpiry < <span style="color: rgb(43,145,175)">DateTime</span>.UtcNow)   
            {     
                Remove(key);    
                <span style="color: blue">return null</span>;      
            }     
            <span style="color: blue">return </span>item.Value;   
        }    
        <span style="color: blue">return null</span>; 
    } 

    <span style="color: blue">public override void </span>Remove(<span style="color: blue">string </span>key) 
    {   
        <span style="color: rgb(43,145,175)">InMemoryOutputCacheItem </span>item = <span style="color: blue">null</span>;  
        <span style="color: blue">if </span>(_cache.TryGetValue(key, <span style="color: blue">out </span>item))  
        {     
            _cache.Remove(key); 
        } 
    }  

    <span style="color: blue">public override void </span>Set(<span style="color: blue">string </span>key, <span style="color: blue">object </span>entry, <span style="color: rgb(43,145,175)">DateTime </span>utcExpiry) 
    {  
        <span style="color: blue">var </span>item = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">InMemoryOutputCacheItem</span>(entry, utcExpiry);   
        <span style="color: blue">lock </span>(_syncLock) 
        {  
            <span style="color: blue">if </span>(_cache.ContainsKey(key))  
            {      
                _cache[key] = item;  
            }    
            </font></font><font face="微软雅黑"><font size="2"><span style="color: blue">else    
            </span>{    
                _cache.Add(key, item); 
            }   
        } 
    }  

    </font></font><font face="微软雅黑"><font size="2"><span style="color: blue">#endregion
</span>}



<span style="color: blue">public class </span></font></font><font face="微软雅黑"><font size="2"><span style="color: rgb(43,145,175)">InMemoryOutputCacheItem
</span>{ 
    <span style="color: blue">#region </span>Members  
 
    <span style="color: blue">public </span><span style="color: rgb(43,145,175)">DateTime </span>UtcExpiry { <span style="color: blue">get</span>; <span style="color: blue">set</span>; }  
    <span style="color: blue">public object </span>Value { <span style="color: blue">get</span>; <span style="color: blue">set</span>; }   

    </font></font><font face="微软雅黑"><font size="2"><span style="color: blue">#endregion 
  
    #region </span>Ctor   

    <span style="color: blue">public </span>InMemoryOutputCacheItem(<span style="color: blue">object </span>value, <span style="color: rgb(43,145,175)">DateTime </span>utcExpiry) 
    {   
        Value = value;   
        UtcExpiry = utcExpiry; 
    }  

    </font></font><font face="微软雅黑"><font size="2"><span style="color: blue">#endregion
</span>}


</font></font></pre>
<font size="2">//配置</font>
<pre class="code"><font face="微软雅黑"><font size="2">        <span style="color: blue"><</span><span style="color: rgb(163,21,21)">caching</span></font></font><font face="微软雅黑"><font size="2"><span style="color: blue">>
            <</span><span style="color: rgb(163,21,21)">outputCache </span><span style="color: red">defaultProvider</span><span style="color: blue">=</span>"<span style="color: blue">InMemory</span>"</font></font><font face="微软雅黑"><font size="2"><span style="color: blue">>
                <</span><span style="color: rgb(163,21,21)">providers</span></font></font><font face="微软雅黑"><font size="2"><span style="color: blue">>
                    <</span><span style="color: rgb(163,21,21)">add </span><span style="color: red">name</span><span style="color: blue">=</span>"<span style="color: blue">InMemory</span>" <span style="color: red">type</span><span style="color: blue">=</span>"<span style="color: blue">InMemoryOutputCacheProvider</span>"</font></font><font face="微软雅黑"><font size="2"><span style="color: blue">/>
                </</span><span style="color: rgb(163,21,21)">providers</span></font></font><font face="微软雅黑"><font size="2"><span style="color: blue">>
            </</span><span style="color: rgb(163,21,21)">outputCache</span></font></font><font face="微软雅黑"><font size="2"><span style="color: blue">>
        </</span><span style="color: rgb(163,21,21)">caching</span></font></font><span style="color: blue"><font size="2" face="微软雅黑">>
</font></span></pre>
<a href="http://11011.net/software/vspaste"></a>

<font size="2">//页面</font>
<pre class="code"><font face="微软雅黑"><font size="2"><span style="background: yellow"><%<span style="color: blue">@ </span><span style="color: maroon">OutputCache </span><span style="color: red">Duration</span><span style="color: blue">="15" </span><span style="color: red">VaryByParam</span><span style="color: blue">="*" </span></font></font><span style="background: yellow"><font size="2" face="微软雅黑">%>
</font></span></pre>
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