XmlDataSource.CacheKeyDependency Property
Definition
Important
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Gets or sets a user-defined key dependency that is linked to all data cache objects created by the data source control. All cache objects explicitly expire when the key expires.
public:
virtual property System::String ^ CacheKeyDependency { System::String ^ get(); void set(System::String ^ value); };public virtual string CacheKeyDependency { get; set; }member this.CacheKeyDependency : string with get, setPublic Overridable Property CacheKeyDependency As StringProperty Value
A key that identifies all cache objects created by the XmlDataSource control.
Remarks
The XmlDataSource control supports data caching. While data is cached, the XmlDataSource retrieves data from the cache rather than from the underlying data file. When the cache expires, it retrieves data from the underlying file and re-caches the data.
You can set the CacheKeyDependency property to create a dependency between all cache entries created by the XmlDataSource control and the key. You can programmatically invalidate all the cache entries at any time by expiring the key.
Because of the properties used to create the CacheKeyDependency, it is possible that multiple XmlDataSource controls can use the same cache in scenarios where they load the same data from the same XML file and transform file and have the same CacheDuration and CacheExpirationPolicy set.
