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ASP比较常用的缓存函数

 2009-05-07 10:39:53 来源:WEB开发网   
核心提示:'缓存时间,单位分钟Const WebCacheTime = 20'缓存标示,ASP比较常用的缓存函数,用于一个空间安装多个系统时使用Const WebCacheFlag = "Cache"' 设置缓存 缓存名,缓存值Function SetCache(ByVal Cache

'缓存时间,单位分钟
Const WebCacheTime = 20
'缓存标示,用于一个空间安装多个系统时使用
Const WebCacheFlag = "Cache"

' 设置缓存 缓存名,缓存值
Function SetCache(ByVal CacheName, ByVal CacheValue)
   Dim CacheData
   CacheName = LCase(ChangeChr(CacheName))
   CacheData = application(WebCacheFlag & CacheName)
   If IsArray(CacheData) Then
     CacheData(0) = CacheValue
     CacheData(1) = Now()
   Else
     ReDim CacheData(2)
     CacheData(0) = CacheValue
     CacheData(1) = Now()
   End If
   Application.Lock
   Application(WebCacheFlag & CacheName) = CacheData
   Application.UnLock
End Function

' 获取缓存 缓存名
Function GetCache(ByVal CacheName)
   Dim CacheData
   CacheName = LCase(ChangeChr(CacheName))
   CacheData = Application(WebCacheFlag & CacheName)
   If IsArray(CacheData) Then GetCache = CacheData(0) Else GetCache = ""
End Function

' 检测缓存 缓存名
Function ChkCache(ByVal CacheName)
   Dim CacheData
   ChkCache = False
   CacheName = LCase(ChangeChr(CacheName))
   CacheData = Application(WebCacheFlag & CacheName)
   If Not IsArray(CacheData) Then Exit Function
   If Not IsDate(CacheData(1)) Then Exit Function
   If DateDiff("s", CDate(CacheData(1)), Now()) < 60 * WebCacheTime Then ChkCache = True
End Function

Tags:ASP 比较 常用

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