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RequestCachePolicy Constructor (RequestCacheLevel)

Initializes a new instance of the RequestCachePolicy class. using the specified cache policy.

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

public RequestCachePolicy(
	RequestCacheLevel level
)

Parameters

level
Type: System.Net.Cache.RequestCacheLevel

A RequestCacheLevel that specifies the cache behavior for resources obtained using WebRequest objects.

ExceptionCondition
ArgumentOutOfRangeException

level is not a valid RequestCacheLevel.value.

This constructor initializes the Level property to level.

The RequestCacheLevel value controls whether caching is enabled, and when the cache can be used. For additional information, see the RequestCacheLevel documentation.

The following code example creates a policy with Level set to CacheOnly.and uses it to set the cache policy of a WebRequest.

public static WebResponse GetResponseFromCache(Uri uri)
{
     RequestCachePolicy policy = 
        new  RequestCachePolicy( RequestCacheLevel.CacheOnly);
    WebRequest request = WebRequest.Create(uri);
    request.CachePolicy = policy;
    WebResponse response = request.GetResponse();
    Console.WriteLine("Policy level is {0}.", policy.Level.ToString());
    Console.WriteLine("Is the response from the cache? {0}", response.IsFromCache);  
    return response;

} 

.NET Framework

Supported in: 4.6, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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