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Provides enumerated values that are used to set the Cache-Control HTTP header.
Namespace: System.Web
Assembly: System.Web (in System.Web.dll)
Public Enumeration HttpCacheability
public enum HttpCacheability
public enum class HttpCacheability
type HttpCacheability
| 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. | |
| 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. | |
| Public | Sets Cache-Control: public to specify that the response is cacheable by clients and shared (proxy) caches. | |
| 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. |
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
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NoCache does not send the common HTTP 1.0 request directive Pragma: no-cache. |
.NET Framework
Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0Windows 8 Release Preview, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 SP2, Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.