RequestCachePolicy Class

 

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

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

System.Object
  System.Net.Cache.RequestCachePolicy
    System.Net.Cache.HttpRequestCachePolicy

public class RequestCachePolicy

NameDescription
System_CAPS_pubmethodRequestCachePolicy()

Initializes a new instance of the RequestCachePolicy class.

System_CAPS_pubmethodRequestCachePolicy(RequestCacheLevel)

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

NameDescription
System_CAPS_pubpropertyLevel

Gets the RequestCacheLevel value specified when this instance was constructed.

NameDescription
System_CAPS_pubmethodEquals(Object)

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

System_CAPS_protmethodFinalize()

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

System_CAPS_pubmethodGetHashCode()

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

System_CAPS_pubmethodGetType()

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

System_CAPS_protmethodMemberwiseClone()

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

System_CAPS_pubmethodToString()

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.

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.

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