1     using System;
 2     using System.Collections;
 3     using System.Collections.Generic;
 4     using System.Linq;
 5     using System.Web;
 6     using System.Web.Caching;
 7
 8     namespace TEST.Public
 9     {
10         public class CacheHelper
11         {
12
13             /// <summary>
14             /// 创建缓存
15             /// </summary>
16             /// <param name="key">缓存的Key</param>
17             /// <param name="value">缓存的数据</param>
18             /// <param name="cacheDependency">依赖项，一般为null</param>
19             /// <param name="dateTime">缓存过期时间</param>
20             /// <param name="timeSpan">设置缓存是不使用过期还是到时间就过期</param>
21             /// <param name="cacheItemPriority">缓存优先级</param>
22             /// <param name="cacheItemRemovedCallback">回调方法，一般为null</param>
23             /// <returns></returns>
24             public bool CreateCache(string key, object value, CacheDependency cacheDependency, DateTime dateTime, TimeSpan timeSpan,
25                 CacheItemPriority cacheItemPriority, CacheItemRemovedCallback cacheItemRemovedCallback)
26             {
27                 if (string.IsNullOrEmpty(key) || value == null)
28                 {
29                     return false;
30                 }
31                 HttpRuntime.Cache.Insert(key, value, cacheDependency, dateTime, timeSpan, cacheItemPriority, cacheItemRemovedCallback);
32                 return true;
33             }
34
35             /// <summary>
36             /// 获取缓存
37             /// </summary>
38             /// <param name="key"></param>
39             /// <returns></returns>
40             public object GetCache(string key)
41             {
42                 return string.IsNullOrEmpty(key) ? null : HttpRuntime.Cache.Get(key);
43             }
44
45
46             /// <summary>
47             /// 移除所有缓存
48             /// </summary>
49             /// <returns></returns>
50             public bool RemoveAll()
51             {
52                 IDictionaryEnumerator iDictionaryEnumerator = HttpRuntime.Cache.GetEnumerator();
53                 while (iDictionaryEnumerator.MoveNext())
54                 {
55                     HttpRuntime.Cache.Remove(Convert.ToString(iDictionaryEnumerator.Key));
56                 }
57                 return true;
58             }
59         }
60     }