HttpCacheability Enumeration (System.Web)

.NET Framework Class Library

HttpCacheability Enumeration

Provides enumerated values that are used to set the Cache-Control HTTP header.

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

Syntax

Visual Basic (Declaration)

Public Enumeration HttpCacheability

Visual Basic (Usage)

Dim instance As HttpCacheability

public enum HttpCacheability

C++

public enum class HttpCacheability

public enum HttpCacheability

JScript

public enum HttpCacheability

Members

	Member name	Description
	NoCache	Sets the Cache-Control: no-cache header. Without a field name, the directive applies to the entire request and a shared (proxy server) cache must force a successful revalidation with the origin Web server before satisfying the request. With a field name, the directive applies only to the named field; the rest of the response may be supplied from a shared cache.
	Private	Default value. Sets Cache-Control: private to specify that the response is cacheable only on the client and not by shared (proxy server) caches.
	Public	Sets Cache-Control: public to specify that the response is cacheable by clients and shared (proxy) caches.
	Server	Specifies that the response is cached only at the origin server. Similar to the NoCache option. Clients receive a Cache-Control: no-cache directive but the document is cached on the origin server. Equivalent to ServerAndNoCache.
	ServerAndNoCache	Applies the settings of both Server and NoCache to indicate that the content is cached at the server but all others are explicitly denied the ability to cache the response.
	ServerAndPrivate	Indicates that the response is cached at the server and at the client but nowhere else. Proxy servers are not allowed to cache the response.

Remarks

For more information, go to RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1, on the World Wide Web Consortium (W3C) Web site. In particular, for complete details, see Section 14.9 "Cache-Control" and Section 13, "Caching in HTTP."

Note
NoCache does not send the common HTTP 1.0 request directive Pragma: no-cache.

Topic	Location
How to: Cache Page Output with Cache Key Dependencies	Building ASP .NET Web Applications
How to: Cache Page Output with Cache Key Dependencies	Building ASP .NET Web Applications
How to: Cache Page Output with Cache Key Dependencies	Building ASP .NET Web Applications in Visual Studio
How to: Cache Page Output with Cache Key Dependencies	Building ASP .NET Web Applications in Visual Studio
How to: Cache Page Output with File Dependencies	Building ASP .NET Web Applications
How to: Cache Page Output with File Dependencies	Building ASP .NET Web Applications
How to: Cache Page Output with File Dependencies	Building ASP .NET Web Applications in Visual Studio
How to: Cache Page Output with File Dependencies	Building ASP .NET Web Applications in Visual Studio
How to: Cache Versions of a Page Using HTTP Headers	Building ASP .NET Web Applications
How to: Cache Versions of a Page Using HTTP Headers	Building ASP .NET Web Applications
How to: Cache Versions of a Page Using HTTP Headers	Building ASP .NET Web Applications in Visual Studio
How to: Cache Versions of a Page Using HTTP Headers	Building ASP .NET Web Applications in Visual Studio
How to: Cache Versions of a Page Using Requesting Browser	Building ASP .NET Web Applications
How to: Cache Versions of a Page Using Requesting Browser	Building ASP .NET Web Applications
How to: Cache Versions of a Page Using Requesting Browser	Building ASP .NET Web Applications in Visual Studio
How to: Cache Versions of a Page Using Requesting Browser	Building ASP .NET Web Applications in Visual Studio
How to: Retrieve Values of Cached Items	Building ASP .NET Web Applications
How to: Retrieve Values of Cached Items	Building ASP .NET Web Applications
How to: Retrieve Values of Cached Items	Building ASP .NET Web Applications in Visual Studio
How to: Retrieve Values of Cached Items	Building ASP .NET Web Applications in Visual Studio
How to: Set Expiration Values for ASP.NET Page Caching	Building ASP .NET Web Applications
How to: Set Expiration Values for ASP.NET Page Caching	Building ASP .NET Web Applications
How to: Set Expiration Values for ASP.NET Page Caching	Building ASP .NET Web Applications in Visual Studio
How to: Set Expiration Values for ASP.NET Page Caching	Building ASP .NET Web Applications in Visual Studio
How to: Set the Cacheability of an ASP.NET Page Declaratively	Building ASP .NET Web Applications
How to: Set the Cacheability of an ASP.NET Page Declaratively	Building ASP .NET Web Applications
How to: Set the Cacheability of an ASP.NET Page Declaratively	Building ASP .NET Web Applications in Visual Studio
How to: Set the Cacheability of an ASP.NET Page Declaratively	Building ASP .NET Web Applications in Visual Studio
How to: Set the Cacheability of an ASP.NET Page Programmatically	Building ASP .NET Web Applications
How to: Set the Cacheability of an ASP.NET Page Programmatically	Building ASP .NET Web Applications
How to: Set the Cacheability of an ASP.NET Page Programmatically	Building ASP .NET Web Applications in Visual Studio
How to: Set the Cacheability of an ASP.NET Page Programmatically	Building ASP .NET Web Applications in Visual Studio

Platforms

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Version Information

.NET Framework

Supported in: 2.0, 1.1, 1.0

Reference

System.Web Namespace
HttpCachePolicy
HttpResponse