FtpWebRequest.DefaultCachePolicy Property

Definition

Namespace:

System.Net

Assembly:

System.Net.Requests.dll

Source:

FtpWebRequest.cs

Defines the default cache policy for all FTP requests.

public:
 static property System::Net::Cache::RequestCachePolicy ^ DefaultCachePolicy { System::Net::Cache::RequestCachePolicy ^ get(); void set(System::Net::Cache::RequestCachePolicy ^ value); };

public static System.Net.Cache.RequestCachePolicy? DefaultCachePolicy { get; set; }

static member DefaultCachePolicy : System.Net.Cache.RequestCachePolicy with get, set

Public Shared Property DefaultCachePolicy As RequestCachePolicy

Property Value

RequestCachePolicy

A RequestCachePolicy that defines the cache policy for FTP requests.

Exceptions

ArgumentNullException

The caller tried to set this property to null.

Remarks

Only content received using the DownloadFile command is cached.

The following table describes the effects of FTP caching policies on FtpWebRequest.

Policy	Effect
Default	Returns the cached resource if the resource is fresh, the content length is accurate, and the expiration, modification, and content length attributes are present.
BypassCache	Returns the resource from the server.
CacheOnly	Returns the cached resource if the content length is present and matches the entry size; otherwise, throws a WebException.
CacheIfAvailable	Returns the cached resource if the content length is provided and matches the entry size; otherwise, the resource is downloaded from the server and is returned to the caller.
Revalidate	Returns the cached resource if the timestamp of the cached resource is the same as the time stamp of the resource on the server; otherwise, the resource is downloaded from the server, stored in the cache, and returned to the caller.
Reload	Downloads the resource from the server, stores it in the cache, and returns the resource to the caller.
NoCacheNoStore	If a cached resource exists, it is deleted. The resource is downloaded from the server and is returned to the caller.

Note

Setting DefaultCachePolicy overrides any configuration setting.

See also

• defaultFtpCachePolicy (Network Settings)