基本的缓存类操作封装（抽象类）

 

Imports  System
Imports  System.Web
Imports  System.Web.Caching

Namespace  DRMSystem.Common.Caching
     Public   MustInherit   Class  DataCacheAbstract
#Region  "Abstract Methods"

         Public   MustOverride   Function  CreateSqlTableCacheDependency( ByVal  ConfigDataBaseName  As   String ,  ByVal  ConfigTableName  As   String )  As  AggregateCacheDependency
         Public   MustOverride   Function  CreateFileCacheDependency( ByVal  FileName  As   String )  As  AggregateCacheDependency

         Public   MustOverride   Function  GetCache( ByVal  Key  As   String )  As   Object

         Public   MustOverride   Sub  Remove( ByVal  Key  As   String )

         Public   MustOverride   Sub  Clear()

         Public   MustOverride   Function  Add( ByVal  Key  As   String ,  ByVal  Value  As   Object ,  ByVal  Dependencies  As  CacheDependency,  ByVal  AbsoluteExpiration  As  DateTime,  ByVal  SlidingExpiration  As  TimeSpan,  ByVal  Priority  As  CacheItemPriority,  ByVal  OnRemoveCallback  As  CacheItemRemovedCallback)  As   Object

         Public   MustOverride   Sub  Insert( ByVal  Key  As   String ,  ByVal  Value  As   Object )
         Public   MustOverride   Sub  Insert( ByVal  Key  As   String ,  ByVal  Value  As   Object ,  ByVal  Dependencies  As  CacheDependency)
         Public   MustOverride   Sub  Insert( ByVal  Key  As   String ,  ByVal  Value  As   Object ,  ByVal  Dependencies  As  CacheDependency,  ByVal  AbsoluteExpiration  As  DateTime,  ByVal  SlidingExpiration  As  TimeSpan)
         Public   MustOverride   Sub  Insert( ByVal  Key  As   String ,  ByVal  Value  As   Object ,  ByVal  Dependencies  As  CacheDependency,  ByVal  AbsoluteExpiration  As  DateTime,  ByVal  SlidingExpiration  As  TimeSpan,  ByVal  Priority  As  CacheItemPriority,  ByVal  OnRemoveCallback  As  CacheItemRemovedCallback)

#End Region
     End Class
End Namespace