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因为考虑到我下面我将写session cookies 等 操作类 ，与cache具有共性。 所以都统一继承了IHttpStorageObject abstract class 来保函数风格的统一 ，但是又为了调用方便，抽象中又使用了单例来简化调用。
使用方法很简单：
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web;using System.Web.Caching;using System.Collections;using System.Linq.Expressions;namespace SyntacticSugar{ /// /// ** 描述：缓存操作类 /// ** 创始时间：2015-6-9 /// ** 修改时间：- /// ** 作者：sunkaixuan /// ** 使用说明：http://www.cnblogs.com/sunkaixuan/p/4563462.html /// /// 键 /// 值 public class CacheManager : IHttpStorageObject { #region 全局变量 private static CacheManager _instance = null; private static readonly object _instanceLock = new object(); #endregion #region 构造函数 private CacheManager() { } #endregion #region 属性 /// ///根据key获取value /// /// /// key是否存在 /// /// key /// /// 存在 true 不存在 false . /// /// public override bool ContainsKey(string key) { return HttpRuntime.Cache[CreateKey(key)] != null; } /// /// 获取缓存值 /// /// key /// /// 获取实例 （单例模式） /// /// GetInstance() { if (_instance == null) lock (_instanceLock) if (_instance == null) _instance = new CacheManager (); return _instance; } /// /// 插入缓存(默认20分钟) /// /// key /// value public override void Add(string key, V value) { Add(key, value, Minutes*20); } /// /// 插入缓存 /// /// key /// value /// 过期时间单位秒 public void Add(string key, V value, int cacheDurationInSeconds) { Add(key, value, cacheDurationInSeconds, CacheItemPriority.Default); } /// /// 插入缓存. /// /// key /// value /// 过期时间单位秒 /// 缓存项属性 public void Add(string key, V value, int cacheDurationInSeconds, CacheItemPriority priority) { string keyString = CreateKey(key); HttpRuntime.Cache.Insert(keyString, value, null, DateTime.Now.AddSeconds(cacheDurationInSeconds), Cache.NoSlidingExpiration, priority, null); } /// /// 插入缓存. /// /// key /// value /// 过期时间单位秒 /// 缓存项属性 public void Add(string key, V value, int cacheDurationInSeconds, CacheDependency dependency, CacheItemPriority priority) { string keyString = CreateKey(key); HttpRuntime.Cache.Insert(keyString, value, dependency, DateTime.Now.AddSeconds(cacheDurationInSeconds), Cache.NoSlidingExpiration, priority, null); } /// /// 删除缓存 /// /// key public override void Remove(string key) { HttpRuntime.Cache.Remove(CreateKey(key)); } /// /// 清除所有缓存 /// public override void RemoveAll() { System.Web.Caching.Cache cache = HttpRuntime.Cache; IDictionaryEnumerator CacheEnum = cache.GetEnumerator(); ArrayList al = new ArrayList(); while (CacheEnum.MoveNext()) { al.Add(CacheEnum.Key); } foreach (string key in al) { cache.Remove(key); } } /// /// 清除所有包含关键字的缓存 /// /// 关键字 public override void RemoveAll(Func removeExpression) { System.Web.Caching.Cache _cache = HttpRuntime.Cache; var allKeyList = GetAllKey(); var delKeyList = allKeyList.Where(removeExpression).ToList(); foreach (var key in delKeyList) { Remove(key); } } /// /// 获取所有缓存key /// /// GetAllKey() { IDictionaryEnumerator CacheEnum = HttpRuntime.Cache.GetEnumerator(); while (CacheEnum.MoveNext()) { yield return CacheEnum.Key.ToString(); } } #endregion #region 私有函数 /// ///创建KEY /// /// Key ///
using System;namespace SyntacticSugar{ public abstract class IHttpStorageObject { public int Minutes = 60; public int Hour = 60 * 60; public int Day = 60 * 60 * 24; public System.Web.HttpContext context = System.Web.HttpContext.Current; public abstract void Add(string key, V value); public abstract bool ContainsKey(string key); public abstract V Get(string key); public abstract global::System.Collections.Generic.IEnumerable GetAllKey(); public abstract void Remove(string key); public abstract void RemoveAll(); public abstract void RemoveAll(Func removeExpression); public abstract V this[string key] { get; } }}