缓存类代码,CSharp代码库,德仔网

代码语言
代码分类
【CSharp】缓存类
作者:Dezai.CN / 发布于2012/1/11/ 695
<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.Web;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Configuration;
</span><span style="color: rgb(0,0,255)">using</span><span style="color: rgb(0,0,0)"> System.Collections;

</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)">CacheHelper 的摘要说明
</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(0,0,255)">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)"> CacheHelper
{
 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 从配置文件中读取缓存时间</span><span style="color: rgb(0,0,0)">
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">缓存时间</span><span style="color: rgb(0,128,0)">
</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)">string</span><span style="color: rgb(0,0,0)"> _CacheTime </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)">.Empty;
 </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)">string</span><span style="color: rgb(0,0,0)"> CacheTime
 {
 </span><span style="color: rgb(0,0,255)">get</span><span style="color: rgb(0,0,0)">
 {
 </span><span style="color: rgb(0,0,255)">try</span><span style="color: rgb(0,0,0)">
 {
 _CacheTime </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> ConfigurationManager.AppSettings[</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">CacheTime</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">].ToString();
 }
 </span><span style="color: rgb(0,0,255)">catch</span><span style="color: rgb(0,0,0)"> (Exception)
 {
 _CacheTime </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(128,0,0)">0</span><span style="color: rgb(128,0,0)">"</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)"> _CacheTime;
 }
 </span><span style="color: rgb(0,0,255)">set</span><span style="color: rgb(0,0,0)"> { _CacheTime </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> value; }
 }
 </span><span style="color: rgb(0,0,255)">#endregion</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)"> CacheHelper()
 {
 </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(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 插入Cache</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)"> 插入Cache 
 </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)"><typeparam name="T"></typeparam></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="o"></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="key"></param></span><span style="color: rgb(0,128,0)"> </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)"> Add</span><span style="color: rgb(0,0,0)"><</span><span style="color: rgb(0,0,0)">T</span><span style="color: rgb(0,0,0)">></span><span style="color: rgb(0,0,0)">(T o, </span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key)
 {
 HttpContext.Current.Cache.Insert(
 key,
 o,
 </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)">,
 DateTime.Now.AddMinutes(Convert.ToDouble(CacheTime)), </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)"> Cache的缓存时间，通常建议配置在Config文件中 </span><span style="color: rgb(0,128,0)">
</span><span style="color: rgb(0,0,0)"> System.Web.Caching.Cache.NoSlidingExpiration);
 }
 </span><span style="color: rgb(0,0,255)">#endregion</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 删除指定的Cache</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)"> 删除指定的Cache 
 </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="key"></span><span style="color: rgb(0,128,0)">Cache的key</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(0,0,0)"> </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(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key)
 {
 HttpContext.Current.Cache.Remove(key);
 }
 </span><span style="color: rgb(0,0,255)">#endregion</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 判断Cache是否存在</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Cache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="key"></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(0,128,0)"> </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)"> Exists(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key)
 {
 </span><span style="color: rgb(0,0,255)">return</span><span style="color: rgb(0,0,0)"> HttpContext.Current.Cache[key] </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)">#endregion</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 取得Cache值，带类型 T</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)"> 取得Cache值，带类型 T 
 </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)"><typeparam name="T"></typeparam></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="key"></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="value"></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(0,128,0)"> </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)"> Get</span><span style="color: rgb(0,0,0)"><</span><span style="color: rgb(0,0,0)">T</span><span style="color: rgb(0,0,0)">></span><span style="color: rgb(0,0,0)">(</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key, </span><span style="color: rgb(0,0,255)">out</span><span style="color: rgb(0,0,0)"> T value)
 {
 </span><span style="color: rgb(0,0,255)">try</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)"> (</span><span style="color: rgb(0,0,0)">!</span><span style="color: rgb(0,0,0)">Exists(key))
 {
 value </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">default</span><span style="color: rgb(0,0,0)">(T); </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(0,0,0)"> </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)">;
 }

 value </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> (T)HttpContext.Current.Cache[key];
 }
 </span><span style="color: rgb(0,0,255)">catch</span><span style="color: rgb(0,0,0)">
 {
 value </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">default</span><span style="color: rgb(0,0,0)">(T);
 </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(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)">#endregion</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 清除所有缓存</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)"> 有时可能需要立即更新,这里就必须手工清除一下Cache 
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)">Cache类有一个Remove方法,但该方法需要提供一个CacheKey,但整个网站的CacheKey我们是无法得知的 
 </span><span style="color: rgb(128,128,128)">///</span><span style="color: rgb(0,128,0)">只能经过遍历 
 </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)"> RemoveAllCache()
 {

 System.Web.Caching.Cache _cache </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> HttpRuntime.Cache;
 IDictionaryEnumerator CacheEnum </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> _cache.GetEnumerator();
 ArrayList al </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)"> ArrayList();
 </span><span style="color: rgb(0,0,255)">while</span><span style="color: rgb(0,0,0)"> (CacheEnum.MoveNext())
 {
 al.Add(CacheEnum.Key);
 }

 </span><span style="color: rgb(0,0,255)">foreach</span><span style="color: rgb(0,0,0)"> (</span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> key </span><span style="color: rgb(0,0,255)">in</span><span style="color: rgb(0,0,0)"> al)
 {
 _cache.Remove(key);
 }
 }
 </span><span style="color: rgb(0,0,255)">#endregion</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,0,255)">#region</span><span style="color: rgb(0,0,0)"> 显示所有缓存</span><span style="color: rgb(0,0,0)">

 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">显示所有缓存 </span><span style="color: rgb(0,128,0)">
</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)">string</span><span style="color: rgb(0,0,0)"> show()
 {
 </span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> str </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 CacheEnum </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> HttpRuntime.Cache.GetEnumerator();

 </span><span style="color: rgb(0,0,255)">while</span><span style="color: rgb(0,0,0)"> (CacheEnum.MoveNext())
 {
 str </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(128,0,0)">缓存名<b>[</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> CacheEnum.Key </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(128,0,0)">]</b></span><span style="color: rgb(128,0,0)">"</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(128,0,0)">"</span><span style="color: rgb(128,0,0)">当前网站总缓存数:</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> HttpRuntime.Cache.Count </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(128,0,0)"></span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> str;
 }
 </span><span style="color: rgb(0,0,255)">#endregion</span><span style="color: rgb(0,0,0)">
}
</span></div>
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