System.Web.Caching Namespace

The System.Web.Caching namespace provides classes for caching frequently used data on the server.

Classes

AggregateCacheDependency

Combines multiple dependencies between an item stored in an ASP.NET application's Cache object and an array of CacheDependency objects. This class cannot be inherited.

Cache

Implements the cache for a Web application. This class cannot be inherited.

CacheDependency

Establishes a dependency relationship between an item stored in an ASP.NET application's Cache object and a file, cache key, an array of either, or another CacheDependency object. The CacheDependency class monitors the dependency relationships so that when any of them changes, the cached item will be automatically removed.

CacheInsertOptions

Represents the type that contains cache insert options.

CacheStoreProvider

Provides the base interface required of any cache store that wants to be plugged in as the default object cache implementation used by MemoryCache.

DatabaseNotEnabledForNotificationException

The exception that is thrown when a SQL Server database is not enabled to support dependencies associated with the SqlCacheDependency class. This class cannot be inherited.

FileResponseElement

Represents part of an output-cache entry, stored as a file.

HeaderElement

Represents a single HTTP header that is included in a response from the output cache.

MemoryResponseElement

Represents part of an output-cache entry that is stored in memory.

OutputCache

Provides programmatic access to the output-cache providers that are specified in the configuration file for a Web site.

OutputCacheProvider

Serves as a base class that contains abstract methods for implementing an output-cache provider.

OutputCacheProviderAsync

Provides an asynchronous OutputCacheProvider class.

OutputCacheProviderCollection

Represents the collection of output-cache providers that are configured for a Web site.

OutputCacheUtility

Provides helper methods for configuring the output cache.

ResponseElement

An abstract base class that represents an HTTP response in the output cache.

SqlCacheDependency

Establishes a relationship between an item stored in an ASP.NET application's Cache object and either a specific SQL Server database table or the results of a SQL Server 2005 query. This class cannot be inherited.

SqlCacheDependencyAdmin

Performs administrative tasks required on a SQL Server database to support the SqlCacheDependency class when using polling-based dependencies. This class cannot be inherited.

SubstitutionResponseElement

Represents a managed delegate that can be called to insert dynamically generated output into an output-cache response.

TableNotEnabledForNotificationException

The exception that is thrown when a SqlCacheDependency class is used against a database table that is not enabled for change notifications.

Interfaces

IOutputCacheEntry

Defines collections of HTTP header and response elements that together make up one kind of output-cached data that ASP.NET can pass to a provider.

Enums

CacheItemPriority

Specifies the relative priority of items stored in the Cache object.

CacheItemRemovedReason

Specifies the reason an item was removed from the Cache.

CacheItemUpdateReason

Specifies the reason that a cached item is being removed from the Cache object.

Delegates

CacheItemRemovedCallback

Defines a callback method for notifying applications when a cached item is removed from the Cache.

CacheItemUpdateCallback

Defines a callback method for notifying applications before a cached item is removed from the cache.

Remarks

This namespace includes the Cache class, a dictionary that enables you to store data objects such as hash tables and data sets. It also provides expiration functionality for those objects, and methods that enable you to add and remove the objects. You can add the objects to the cache with a dependency on other files or cache entries. In that case, the Cache object can invoke a callback method to notify your application when an object is removed from the cache.