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Asked: 2026-05-13T05:34:09+00:00

While I am working on cache, there is something like VaryByParam in page directive.

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While I am working on cache, there is something like

VaryByParam

in page directive. So what is this? Can anybody explain it to me?

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  1. Editorial Team

    From @ OutputCache (MSDN):

    A semicolon-separated list of strings used to vary the output cache. By default, these strings correspond to a query string value sent with GET method attributes, or a parameter sent using the POST method. When this attribute is set to multiple parameters, the output cache contains a different version of the requested document for each specified parameter. Possible values include none, *, and any valid query string or POST parameter name.

    By using it, if you call your page using same variable value, that page will be retrieved from your cache and will not be executed until time especified in Duration argument be reached.

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