DataCache.AddCacheLevelCallback Method (DataCacheOperations, DataCacheNotificationCallback)


Adds a cache notification callback for cache operations occurring on all regions and items. Not supported in Windows Azure Shared Caching.

Namespace:   Microsoft.ApplicationServer.Caching
Assembly:  Microsoft.ApplicationServer.Caching.Client (in Microsoft.ApplicationServer.Caching.Client.dll)

public DataCacheNotificationDescriptor AddCacheLevelCallback(
	DataCacheOperations filter,
	DataCacheNotificationCallback clientCallback


Type: Microsoft.ApplicationServer.Caching.DataCacheOperations

The type of cache operation(s) that will trigger cache notifications.

Type: Microsoft.ApplicationServer.Caching.DataCacheNotificationCallback

The name of the method you want to invoke when these notifications occur.

Return Value

Type: Microsoft.ApplicationServer.Caching.DataCacheNotificationDescriptor

A DataCacheNotificationDescriptor object used to identify the cache notification callback.

Use the DataCacheOperations enumeration in the filter parameter to specify what type of item or region operations you want to trigger cache notifications. Select more than one enumeration by separating the enumerations with the binary OR operator to perform a bitwise OR. To do this, use the | character in C#, and the Or operator in Visual Basic.

The clientCallback method you invoke with the cache notification must accept the same parameters as the DataCacheNotificationCallback delegate.


In order for your application to use notifications, you need to enable them on a named cache. For Windows Server AppFabric Caching, use the NotificationsEnabled parameter with the New-Cache or Set-CacheConfig Windows PowerShell commands. For Windows Azure Caching on roles, enable notifications in the cache settings.

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