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OutputCacheProfile::VaryByParam Property

Gets or sets the VaryByParam property.

Namespace:  System.Web.Configuration
Assembly:  System.Web (in System.Web.dll)

[ConfigurationPropertyAttribute(L"varyByParam")]
public:
property String^ VaryByParam {
	String^ get ();
	void set (String^ value);
}

Property Value

Type: System::String
The VaryByParam value.

The VaryByParam is a semicolon-delimited set of parameters used to vary the cached output. It allows varying the cached output by GET query string or form POST parameters. For instance, you can vary the user-control output to the cache by specifying the user-control name along with either a query string or a form POST parameter. For more information, see Caching Multiple Versions of User Control Output.

The VaryByParam setting must be defined in either the profile or the @ OutputCache directive of the page using the profile.

NoteNote

The OutputCacheProfile::VaryByParam settings are the same ones used by the VaryByParam attribute of the @ OutputCache. Varying by all parameters by setting the value of "*" is not recommended. It can result in cache overflow or a denial of service attack on the Web server.

The following code example shows how to use the VaryByParam property.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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