RequestCachePolicy.Level Property

Reference

Definition

Namespace:: System.Net.Cache

Assemblies:: netstandard.dll, System.Net.Primitives.dll

Assembly:: System.Net.Primitives.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: RequestCachePolicy.cs

Source:: RequestCachePolicy.cs

Source:: RequestCachePolicy.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the RequestCacheLevel value specified when this instance was constructed.

public:
 property System::Net::Cache::RequestCacheLevel Level { System::Net::Cache::RequestCacheLevel get(); };

public System.Net.Cache.RequestCacheLevel Level { get; }

member this.Level : System.Net.Cache.RequestCacheLevel

Public ReadOnly Property Level As RequestCacheLevel

Property Value

RequestCacheLevel

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

Examples

The following code example creates a CacheOnly policy and sends a request.

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;
}

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;
}

Remarks

Applications typically use Default as their cache policy level. Using the Default level, the effective cache policy is determined by the current cache policy and the age of the content in the cache. The WebRequest.CachePolicy property, if not null, determines the cache policy in effect for a request.

The default policy for the application domain can be set using the DefaultCachePolicy or the application or machine configuration file. For more information, see <requestCaching> Element (Network Settings).

Applies to

Proizvod	Verzije
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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