RequestCachePolicy Class

RequestCachePolicy Class


Defines an application's caching requirements for resources obtained by using WebRequest objects.

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

public class RequestCachePolicy


Initializes a new instance of the RequestCachePolicy class.


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


Gets the RequestCacheLevel value specified when this instance was constructed.


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)


Gets the Type of the current instance.(Inherited from Object.)


Creates a shallow copy of the current Object.(Inherited from Object.)


Returns a string representation of this instance.(Overrides Object.ToString().)

You can specify a default cache policy for your application by using the DefaultCachePolicy property or the application or machine configuration files. For more information, see <requestCaching> Element (Network Settings).

You can specify the cache policy for an individual request by using the CachePolicy property.

Caching for Web services is not supported.

Legacy Code Example

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
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Return to top
© 2015 Microsoft