1 using System;
  2 using System.Collections;
  3 using System.Collections.Generic;
  4 using System.Linq;
  5 using System.Text;
  6 using System.Threading.Tasks;
  7 using System.Web;
  8 using System.Web.Caching;
  9 
 10 namespace 后端操作cookie
 11 {
 12 class CacheHelper
 13 { /// <summary>
 14 /// 获取当前应用程序指定CacheKey的Cache值
 15 /// </summary>
 16 /// <param name="CacheKey">
 17 /// <returns></returns>y
 18 public static object GetCache(string CacheKey)
 19 {
 20 System.Web.Caching.Cache objCache = HttpRuntime.Cache;
 21 return objCache[CacheKey];
 22 }
 23 
 24 /// <summary>
 25 /// 设置当前应用程序指定CacheKey的Cache值
 26 /// </summary>
 27 /// <param name="CacheKey">
 28 /// <param name="objObject">
 29 public static void SetCache(string CacheKey, object objObject)
 30 {
 31 System.Web.Caching.Cache objCache = HttpRuntime.Cache;
 32 objCache.Insert(CacheKey, objObject);
 33 }
 34 
 35 
 36 /// <summary>
 37 /// 设置当前应用程序指定CacheKey的Cache值
 38 /// </summary>
 39 /// <param name="CacheKey">
 40 /// <param name="objObject">
 41 public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
 42 {
 43 System.Web.Caching.Cache objCache = HttpRuntime.Cache;
 44 objCache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration);
 45 }
 46 
 47 /// <summary> 
 48 /// 设置数据缓存 
 49 /// </summary> 
 50 public static void SetCache(string CacheKey, object objObject, int timeout = 7200)
 51 {
 52 try
 53 {
 54 if (objObject == null) return;
 55 var objCache = HttpRuntime.Cache;
 56 //相对过期 
 57 //objCache.Insert(cacheKey, objObject, null, DateTime.MaxValue, timeout, CacheItemPriority.NotRemovable, null); 
 58 //绝对过期时间 
 59 objCache.Insert(CacheKey, objObject, null, DateTime.Now.AddSeconds(timeout), TimeSpan.Zero, CacheItemPriority.High, null);
 60 }
 61 catch (Exception)
 62 {
 63 //throw; 
 64 }
 65 }
 66 /// <summary>
 67 /// 清除单一键缓存
 68 /// </summary>
 69 /// <param name="key">
 70 public static void RemoveKeyCache(string CacheKey)
 71 {
 72 try
 73 {
 74 System.Web.Caching.Cache objCache = HttpRuntime.Cache;
 75 objCache.Remove(CacheKey);
 76 }
 77 catch { }
 78 }
 79 
 80 /// <summary>
 81 /// 清除所有缓存
 82 /// </summary>
 83 public static void RemoveAllCache()
 84 {
 85 System.Web.Caching.Cache _cache = HttpRuntime.Cache;
 86 IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
 87 if (_cache.Count > 0)
 88 {
 89 ArrayList al = new ArrayList();
 90 while (CacheEnum.MoveNext())
 91 {
 92 al.Add(CacheEnum.Key);
 93 }
 94 foreach (string key in al)
 95 {
 96 _cache.Remove(key);
 97 }
 98 }
 99 }
100 /// <summary> 
101 /// 清除所有缓存
102 /// </summary> 
103 public static void RemoveAllCaches()
104 {
105 var cache = HttpRuntime.Cache;
106 var cacheEnum = cache.GetEnumerator();
107 while (cacheEnum.MoveNext())
108 {
109 cache.Remove(cacheEnum.Key.ToString());
110 }
111 }
112 /// <summary>
113 /// 以列表形式返回已存在的所有缓存 
114 /// </summary>
115 /// <returns></returns> 
116 public static ArrayList ShowAllCache()
117 {
118 ArrayList al = new ArrayList();
119 System.Web.Caching.Cache _cache = HttpRuntime.Cache;
120 if (_cache.Count > 0)
121 {
122 IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
123 while (CacheEnum.MoveNext())
124 {
125 al.Add(CacheEnum.Key);
126 }
127 }
128 return al;
129 }
130 
131 }
132 }