HttpCacheVaryByHeaders::Item Property
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.
Assembly: System.Web (in System.Web.dll)
public: property bool Item[String^ header] { bool get (String^ header); void set (String^ header, bool value); }
Parameters
- header
- Type: System::String
The name of the custom header.
Property Value
Type: System::Booleantrue when the ASP.NET output cache varies by the specified custom field; otherwise, false. The default value is false.
| Exception | Condition |
|---|---|
| ArgumentNullException | header is nullptr. |
The Vary header indicates the request-header fields that the server varies the response by.
For more information, 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.
The VaryByUnspecifiedParameters method is called internally if the specified header has the value * (an asterisk).
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.