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HttpCacheAgeControl Enumeration

Specifies the meaning of time values that control caching behavior for resources obtained using HttpWebRequest objects.

Namespace:  System.Net.Cache
Assembly:  System (in System.dll)

public enum HttpCacheAgeControl

Member nameDescription
NoneFor internal use only. The Framework will throw an ArgumentException if you try to use this member.
MinFreshContent can be taken from the cache if the time remaining before expiration is greater than or equal to the time specified with this value.
MaxAgeContent can be taken from the cache until it is older than the age specified with this value.
MaxStaleContent can be taken from the cache after it has expired, until the time specified with this value elapses.
MaxAgeAndMinFreshMaxAge and MinFresh.
MaxAgeAndMaxStaleMaxAge and MaxStale.

This enumeration is used by members of the HttpRequestCachePolicy class to configure the time values for cache policies.

The following code example creates a policy based on MaxAgeAndMinFresh.

public static HttpRequestCachePolicy CreateFreshAndAgePolicy(TimeSpan freshMinimum, TimeSpan ageMaximum)
{
    HttpRequestCachePolicy policy = 
        new HttpRequestCachePolicy(HttpCacheAgeControl.MaxAgeAndMinFresh, ageMaximum, freshMinimum); 
    Console.WriteLine(policy.ToString());
    return policy; 
}
public:
    static HttpRequestCachePolicy* CreateFreshAndAgePolicy(TimeSpan freshMinimum, TimeSpan ageMaximum)
    {
        HttpRequestCachePolicy* policy = 
            new HttpRequestCachePolicy(HttpCacheAgeControl::MinFreshAndMaxAge, ageMaximum, freshMinimum); 
        Console::WriteLine(policy);
        return policy; 
    }

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0
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