HttpCacheVaryByParams.Item Property
Assembly: System.Web (in system.web.dll)
public: property bool default [String^] { bool get (String^ header); void set (String^ header, bool value); }
/** @property */ public boolean get_Item (String header) /** @property */ public void set_Item (String header, boolean value)
JScript supports the use of indexed properties, but not the declaration of new ones.
Parameters
- header
The name of the custom parameter.
Property Value
true if the cache should vary by the specified parameter value.When used as an accessor (getter), the Item indexer returns true if a value for the specified parameter is found in the current parameters collection, or if the collection is set to vary by * (an asterisk), which indicates all parameters.
When used as a mutator (setter), the Item indexer sets the value for the parameter in the parameters collection that corresponds to the specified header to true. The value * can be specified, which indicates all parameters.
The following code example demonstrates how the Item indexer is accessed from the HttpCachePolicy object associated with an HttpResponse.
get_Response().get_Cache().SetExpires(DateTime.get_Now().
AddSeconds(60));
get_Response().get_Cache().SetCacheability(HttpCacheability.Public);
get_Response().get_Cache().SetValidUntilExpires(false);
get_Response().get_Cache().get_VaryByParams().
set_Item("Category", true);
if (get_Response().get_Cache().get_VaryByParams().
get_Item("Category")) {
//...
}
Response.Cache.SetExpires(DateTime.Now.AddSeconds(60)) Response.Cache.SetCacheability(HttpCacheability.Public) Response.Cache.SetValidUntilExpires(false) Response.Cache.VaryByParams("Category") = true if(Response.Cache.VaryByParams("Category")){ //... }
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.