System.Web Namespace   HttpCacheVaryByHeaders Class

Sets or retrieves a value indicating whether the origin server adds the Accept-Charset field to the Vary HTTP header.

[ VB ]
Public Property UserCharSet As Boolean

[ C# ]
public bool UserCharSet {get; set;}

[ C++ ]
public: __property bool get_UserCharSet ( );
public: __property void set_UserCharSet ( bool );

[ JScript ]
public function get UserCharSet ( ) : Boolean;
public function set UserCharSet ( Boolean );

The default value is false. When set to true, this property causes ASP.NET to add the Accept-Charset field to the Vary HTTP header sent to the client.

The Vary header indicates the request-header fields that the server uses to determine which of multiple cached responses is sent in response to a client request. The Accept-CharSet field specifies that the server selects the response based on the client's character set.

For background information on HTTP headers, see Section 14 Header Field Definitions in the Hypertext Transfer Protocol ( HTTP/1.1 ) documentation, available from the World Wide Web Consortium.

This example performs some action only if the UserCharset property is true.

if ( Response.Cache.VaryByHeaders.UserCharSet == True ) {
   // ... do whatever here
}

If Response.Cache.VaryByHeaders.UserCharSet = True Then
   ' ... do whatever here
End If

HttpCacheVaryByHeaders Members   Caching Multiple Versions of a Page