缓存常用操作类代码,CSharp代码库,德仔网

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代码分类
【CSharp】缓存常用操作类
作者:Dezai.CN / 发布于2012/1/11/ 777
<div><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Collections.Generic;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Text;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Web;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Data;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Collections;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Text.RegularExpressions;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Web.Caching;

</span><span style="color: rgb(0,0,255)">namespace</span><span style="color: rgb(0,0,0)"> DotNet.Common
{
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 缓存常用操作
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">class</span><span style="color: rgb(0,0,0)"> CacheUtil
 {
 </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> CacheUtil()
 {
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)"> TODO: 在此处添加构造函数逻辑
 </span><span style="color: rgb(0,128,0)">//
</span><span style="color: rgb(0,0,0)"> }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 增加一个缓存对象
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="strKey"></span><span style="color: rgb(0,128,0)">键</span><span style="color: rgb(128,128,128)"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="valueObj"></span><span style="color: rgb(0,128,0)">值</span><span style="color: rgb(128,128,128)"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="duration"></span><span style="color: rgb(0,128,0)">以秒为单位</span><span style="color: rgb(128,128,128)"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><returns></returns></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">bool</span><span style="color: rgb(0,0,0)"> Insert(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> strKey, </span><span style="color: rgb(0,0,255)">object</span><span style="color: rgb(0,0,0)"> valueObj, </span><span style="color: rgb(0,0,255)">double</span><span style="color: rgb(0,0,0)"> durationSecond)
 {
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (strKey </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">&&</span><span style="color: rgb(0,0,0)"> strKey.Length </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,128)">0</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">&&</span><span style="color: rgb(0,0,0)"> valueObj </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">)
 {
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">建立回调委托的一个实例</span><span style="color: rgb(0,128,0)">
</span><span style="color: rgb(0,0,0)">
 CacheItemRemovedCallback callBack </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">new</span><span style="color: rgb(0,0,0)"> CacheItemRemovedCallback(onRemove);
 HttpContext.Current.Cache.Insert(strKey, valueObj, </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">,DateTime.Now.AddSeconds(durationSecond),System.Web.Caching.Cache.NoSlidingExpiration,
 System.Web.Caching.CacheItemPriority.Default,
 callBack);
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">true</span><span style="color: rgb(0,0,0)">;
 }
 </span><span style="color: rgb(0,0,255)">else</span><span style="color: rgb(0,0,0)">
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">false</span><span style="color: rgb(0,0,0)">;
 }
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 判断缓存对象是否存在
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="strKey"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><returns></returns></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">bool</span><span style="color: rgb(0,0,0)"> IsExist(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> strKey)
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> HttpContext.Current.Cache[strKey] </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">;
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 读取缓存对象
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="strKey"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="obj"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><returns></returns></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">object</span><span style="color: rgb(0,0,0)"> Read(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> strKey)
 {
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">取出值</span><span style="color: rgb(0,128,0)">
</span><span style="color: rgb(0,0,0)">
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (HttpContext.Current.Cache[strKey] </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">)
 {
 </span><span style="color: rgb(0,0,255)">object</span><span style="color: rgb(0,0,0)"> obj </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> HttpContext.Current.Cache[strKey];
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (obj </span><span style="color: rgb(0,0,0)">==</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">)
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">;
 }
 </span><span style="color: rgb(0,0,255)">else</span><span style="color: rgb(0,0,0)">
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> obj;
 }
 }
 </span><span style="color: rgb(0,0,255)">else</span><span style="color: rgb(0,0,0)">
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">;
 }
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 删除缓存对象
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="strKey"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><returns></returns></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> Remove(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> strKey)
 {
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (HttpContext.Current.Cache[strKey] </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">)
 {
 HttpContext.Current.Cache.Remove(strKey);
 }
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 根据设置的正则表达式清除缓存对象
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="pattern"></span><span style="color: rgb(0,128,0)">正则表达式</span><span style="color: rgb(128,128,128)"></param></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> RemoveByRegexp(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> pattern)
 {
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (pattern </span><span style="color: rgb(0,0,0)">!=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">""</span><span style="color: rgb(0,0,0)">)
 {
 IDictionaryEnumerator enu </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> HttpContext.Current.Cache.GetEnumerator();
 </span><span style="color: rgb(0,0,255)">while</span><span style="color: rgb(0,0,0)"> (enu.MoveNext())
 {
 </span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> enu.Key.ToString();
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)">(Regex.IsMatch(key,pattern))
 {
 Remove(key);
 }
 }
 }
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 清除所有缓存对象
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">public</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> Clear()
 {
 IDictionaryEnumerator enu </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> HttpContext.Current.Cache.GetEnumerator();
 </span><span style="color: rgb(0,0,255)">while</span><span style="color: rgb(0,0,0)"> (enu.MoveNext())
 {
 Remove(enu.Key.ToString());
 }
 }

 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> 此方法在值失效之前调用，可以用于在失效之前更新数据库，或从数据库重新获取数据
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"></summary></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="strKey"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="obj"></param></span><span style="color: rgb(0,128,0)">
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)"> </span><span style="color: rgb(128,128,128)"><param name="reason"></param></span><span style="color: rgb(128,128,128)">
</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">private</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">static</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> onRemove(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> strKey, </span><span style="color: rgb(0,0,255)">object</span><span style="color: rgb(0,0,0)"> obj, CacheItemRemovedReason reason)
 {

 }
 }
}
</span></div>
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