ihttpresponse-disablekernelcache-method.md

title	IHttpResponse::DisableKernelCache Method
description	Describes the IHttpResponse::DisableKernelCache Method and details its syntax, parameters, return value, remarks, code example, and requirements.
ms.date	10/07/2016
ms.assetid	cb176222-ffa6-4591-b5ec-dc22d164fa3e

IHttpResponse::DisableKernelCache Method

Disables the kernel cache for this response.

Syntax

virtual VOID DisableKernelCache(  
   ULONG reason = 9  
) = 0;  

Parameters

reason
The optional reason for disabling the kernel cache.

Return Value

VOID.

Remarks

The DisableKernelCache method disables kernel caching for the current response.

You can optionally pass a reason parameter that contains a value defined in the IISCacheEvents::HTTPSYS_CACHEABLE::enumReason enumeration to indicate why you are disabling caching.

Note

If you do not pass a reason parameter to the DisableKernelCache method, the default value of 9 (HANDLER_HTTPSYS_UNFRIENDLY) will be used.

Example

The following code example demonstrates how to use the DisableKernelCache method to disable kernel caching for the current request.

Note

Combine this example module with the example module listed for the GetKernelCacheEnabled method if you want to return the current caching status.

[!code-cppIHttpResponseDisableKernelCache#1]

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.

Requirements

Type	Description
Client	- IIS 7.0 on [!INCLUDEwinvista] - IIS 7.5 on Windows 7 - IIS 8.0 on Windows 8 - IIS 10.0 on Windows 10
Server	- IIS 7.0 on [!INCLUDEwinsrv2008] - IIS 7.5 on Windows Server 2008 R2 - IIS 8.0 on Windows Server 2012 - IIS 8.5 on Windows Server 2012 R2 - IIS 10.0 on Windows Server 2016
Product	- IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0 - [!INCLUDEiisexp75], [!INCLUDEiisexp80], [!INCLUDEiisexp100]
Header	Httpserv.h

See Also

IHttpResponse Interface
IHttpResponse::GetCachePolicy Method
IHttpResponse::GetKernelCacheEnabled Method
IHttpServer::FlushKernelCache Method