RequestCachePolicy Class
Defines an application's caching requirements for resources obtained by using WebRequest objects.
Assembly: System (in System.dll)
The RequestCachePolicy type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | RequestCachePolicy() | Initializes a new instance of the RequestCachePolicy class. |
![]() | RequestCachePolicy(RequestCacheLevel) | Initializes a new instance of the RequestCachePolicy class. using the specified cache policy. |
| Name | Description | |
|---|---|---|
![]() | Level | Gets the RequestCacheLevel value specified when this instance was constructed. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | 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.
static WebResponse^ GetResponseFromCache( Uri^ uri ) { RequestCachePolicy^ policy = gcnew RequestCachePolicy( RequestCacheLevel::CacheOnly ); WebRequest^ request = WebRequest::Create( uri ); request->CachePolicy = policy; WebResponse^ response = request->GetResponse(); Console::WriteLine( L"Policy level is {0}.", policy->Level ); Console::WriteLine( L"Is the response from the cache? {0}", response->IsFromCache ); return response; }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
