System.Web.Caching，system.web
System.Web.Caching簡單封裝類：
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1 using System;
2 using System.Collections.Generic;
3 using System.Web.Caching;
4 using System.Web;
5 using System.Collections;
6
7 namespace APP.HttpCache
8 {
9 public class CacheHelper
10 {
11 private static Cache cacheObj = HttpRuntime.Cache;
12
13 /// <summary>
14 /// 簡單key，vlaue寫入
15 /// </summary>
16 /// <param name="key"></param>
17 /// <param name="value"></param>
18 public static void Insert(string key, object value)
19 {
20 cacheObj.Insert(key, value);
21 }
22
23 /// <summary>
24 /// 設置絕對過期時間
25 /// </summary>
26 /// <param name="key"></param>
27 /// <param name="value"></param>
28 /// <param name="absoluteExpiration"></param>
29 /// <param name="slidingExpiration"></param>
30 public static void Insert(string key, object value, DateTime absoluteExpiration)
31 {
32 cacheObj.Insert(key, value, null, absoluteExpiration, Cache.NoSlidingExpiration);
33 }
34
35 /// <summary>
36 /// 設置平滑過期
37 /// </summary>
38 /// <param name="key"></param>
39 /// <param name="value"></param>
40 /// <param name="slidingExpiration"></param>
41 public static void Insert(string key, object value, TimeSpan slidingExpiration)
42 {
43 cacheObj.Insert(key, value, null, Cache.NoAbsoluteExpiration, slidingExpiration);
44 }
45
46 /// <summary>
47 /// 得到vlaue
48 /// </summary>
49 /// <param name="key"></param>
50 /// <returns></returns>
51 public static object Get(string key)
52 {
53 return cacheObj.Get(key);
54 }
55
56 /// <summary>
57 /// 得到vlaue
58 /// </summary>
59 /// <param name="key"></param>
60 /// <returns></returns>
61 public static T Get<T>(string key)
62 {
63 var v = cacheObj.Get(key);
64 return v == null ? default(T) : (T)Convert.ChangeType(v, typeof(T));
65 }
66
67 /// <summary>
68 /// 移除key
69 /// </summary>
70 /// <param name="key"></param>
71 /// <returns></returns>
72 public static void Delete(string key)
73 {
74 cacheObj.Remove(key);
75 }
76
77 /// <summary>
78 /// 移除key
79 /// </summary>
80 /// <param name="key"></param>
81 /// <returns></returns>
82 public static object Remove(string key)
83 {
84 return cacheObj.Remove(key);
85 }
86
87 /// <summary>
88 /// 移除key
89 /// </summary>
90 /// <param name="key"></param>
91 /// <returns></returns>
92 public static T Remove<T>(string key)
93 {
94 var v = cacheObj.Remove(key);
95 return v == null ? default(T) : (T)Convert.ChangeType(v, typeof(T));
96 }
97
98 /// <summary>
99 /// 緩存key數量
100 /// </summary>
101 public static int KeyCount
102 {
103 get
104 {
105 return cacheObj.Count;
106 }
107 }
108
109 /// <summary>
110 /// 所有key
111 /// </summary>
112 public static ArrayList KeyAll()
113 {
114 var arr = new ArrayList();
115 var item = cacheObj.GetEnumerator();
116 while (item.MoveNext())
117 {
118 arr.Add(item.Key);
119 }
120 return arr;
121 }
122
123 /// <summary>
124 /// 清空所有緩存
125 /// </summary>
126 public static void DeleteAll()
127 {
128 var item = cacheObj.GetEnumerator();
129 while (item.MoveNext())
130 {
131 cacheObj.Remove(item.Key.ToString());
132 }
133 }
134 }
135 }
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