HttpCachePolicy::SetCacheability Method (HttpCacheability, String)
Sets the Cache-Control header to one of the values of HttpCacheability and appends an extension to the directive.
Assembly: System.Web (in System.Web.dll)
Parameters
- cacheability
- Type: System.Web::HttpCacheability
The HttpCacheability enumeration value to set the header to.
- field
- Type: System::String
The cache control extension to add to the header.
| Exception | Condition |
|---|---|
| ArgumentNullException | field is nullptr. |
| ArgumentException |
The field name extension is valid only when used with the private or no-cache directives. For more information, see RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1, available on the World Wide Web Consortium (W3C) Web site.
This method will throw an invalid argument exception if incompatible directives and extensions are combined.
SetCacheability is introduced in the .NET Framework version 3.5. For more information, see .NET Framework Versions and Dependencies.
The following code example demonstrates how the Cache-Control header is set to the enumeration value private and adds a cache-control extension. The modified directive means that in addition to any non-shared cache, any cache shared only by members of the community named "DEV" may cache the response.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.