HttpCacheVaryByHeaders Class
Provides a type-safe way to set the VaryByHeaders property.
Namespace: System.Web
Assembly: System.Web (in System.Web.dll)
The HttpCacheVaryByHeaders type exposes the following members.
| Name | Description | |
|---|---|---|
 | HttpCacheVaryByHeaders | Initializes a new instance of the HttpCacheVaryByHeaders class. |
| Name | Description | |
|---|---|---|
| AcceptTypes | Gets or sets a value indicating whether the ASP.NET output cache varies the cached responses by the Accept HTTP header, and appends it to the out-going Vary HTTP header. |
| Item | Gets or sets a custom header field that the ASP.NET output cache varies the cached responses by, and appends it to the out-going Vary HTTP header. |
| UserAgent | Gets or sets a value indicating whether the ASP.NET output cache varies the cached responses by the User-Agent header, and appends it to the out-going Vary HTTP header. |
| UserCharSet | Gets or sets a value indicating whether the ASP.NET output cache varies the cached responses by the Accept-Charset header, and appends it to the out-going Vary HTTP header. |
| UserLanguage | Gets or sets a value indicating whether the ASP.NET output cache varies the cached responses by the Accept-Language header, and appends it to the out-going Vary HTTP header. |
| Name | Description | |
|---|---|---|
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| VaryByUnspecifiedParameters | Causes ASP.NET to vary by all header values and sets the Vary HTTP header to the value * (an asterisk). All other Vary header information to be dropped. |
The VaryByHeaders property identifies which request header parameters ASP.NET uses to uniquely identify a variation of the response when there are multiple cached responses for a resource. This is useful when a response depends on a set of client inputs, such as headers or parameters.
The HttpCacheVaryByHeaders is not directly related to HTTP cache-control headers, but helps ensure that a client or proxy varies by the specified headers. For more information about VaryByHeaders, see RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1, available on the World Wide Web Consortium (W3C) Web site. See section 14, "Header Field Definitions", for complete details.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), 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.
