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HttpCacheVaryByHeaders Class

Provides a type-safe way to set the VaryByHeaders property.

System.Object
  System.Web.HttpCacheVaryByHeaders

Namespace:  System.Web
Assembly:  System.Web (in System.Web.dll)
public sealed class HttpCacheVaryByHeaders

The HttpCacheVaryByHeaders type exposes the following members.

  NameDescription
Public methodHttpCacheVaryByHeadersInitializes a new instance of the HttpCacheVaryByHeaders class.
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  NameDescription
Public propertyAcceptTypesGets 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.
Public propertyItemGets 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.
Public propertyUserAgentGets 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.
Public propertyUserCharSetGets 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.
Public propertyUserLanguageGets 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.
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  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodVaryByUnspecifiedParametersCauses 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.
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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.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

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.
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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