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You receive a new Web page instead of a cached Web page even though the SetSlidingExpiration method is set to true on a computer that is running the .NET Framework 2.0

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks
Article ID: 909643 - Last Review: December 3, 2007 - Revision: 1.3

You receive a new Web page instead of a cached Web page even though the SetSlidingExpiration method is set to true on a computer that is running the .NET Framework 2.0

View products that this article applies to.

SYMPTOMS

When you try to configure a Microsoft ASP.NET Web page to use a sliding expiration on a computer that is running the Microsoft .NET Framework 2.0, you receive a new Web page from the server instead of a cached Web page.

This issue occurs even though the SetSlidingExpiration method is set to true.
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CAUSE

This problem occurs because a request to the origin server always generates a response when the SetSlidingExpiration method is set to true. A value of true sets cache expiration to sliding.
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WORKAROUND

To work around this issue, use one of the following methods to prevent the origin server from generating a response when the SetSlidingExpiration method is set to true:
  • Response.Cache.SetLastModifiedFromFileDependencies
  • Response.Cache.SetETagFromFileDependencies
  • Response.Cache.AddValidationCallback
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STATUS

This behavior is by design.
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MORE INFORMATION

For more information about the Response.Cache.SetLastModifiedFromFileDependencies method, visit the following Microsoft Developer Network (MSDN) Web site:
http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.setlastmodifiedfromfiledependencies(vs.71).aspx (http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.setlastmodifiedfromfiledependencies(vs.71).aspx)
For more information about the Response.Cache.SetETagFromFileDependencies method, visit the following MSDN Web site:
http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.setetagfromfiledependencies(vs.71).aspx (http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.setetagfromfiledependencies(vs.71).aspx)
For more information about the Response.Cache.AddValidationCallback method, visit the following MSDN Web site:
http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.addvalidationcallback(vs.71).aspx (http://msdn2.microsoft.com/en-us/library/system.web.httpcachepolicy.addvalidationcallback(vs.71).aspx)
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APPLIES TO
  • Microsoft .NET Framework 2.0
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Keywords: 
kbtshoot kbcode kbprb KB909643
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