Cached data expires only when the cache entry has not been used for the amount of time specified by the CacheDuration property.
Syntax
DataSourceCacheExpiry Sliding
Requirements
Namespace: System.Web.UI
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 2.0.0.0
Since: .NET 2.0