HttpCachePolicy::SetValidUntilExpires Method
Specifies whether the ASP.NET cache should ignore HTTP Cache-Control headers sent by the client that invalidate the cache.
Assembly: System.Web (in System.Web.dll)
Parameters
- validUntilExpires
- Type: System::Boolean
true if the cache ignores Cache-Control invalidation headers; otherwise, false.
The SetValidUntilExpires method is set to true automatically when the high-level <%@ OutputCache … %> page directive is used.
This method is provided because some browsers, when refreshing a page view, send HTTP cache invalidation headers to the Web server and evict the page from the cache. When the validUntilExpires parameter is true, ASP.NET ignores cache invalidation headers and the page remains in the cache until it expires.
SetValidUntilExpires is introduced in the .NET Framework version 3.5. For more information, see .NET Framework 3.5 Architecture.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.