DataCacheItem.Version Property

Artikkeli
08/26/2011

The version of the cached object.

Namespace: Microsoft.ApplicationServer.Caching
Assembly: Microsoft.ApplicationServer.Caching.Core (in microsoft.applicationserver.caching.core.dll)

Usage

'Usage
Dim instance As DataCacheItem
Dim value As DataCacheItemVersion

value = instance.Version

Syntax

'Declaration
Public ReadOnly Property Version As DataCacheItemVersion

public DataCacheItemVersion Version { get; }

public:
property DataCacheItemVersion^ Version {
    DataCacheItemVersion^ get ();
}

/** @property */
public DataCacheItemVersion get_Version ()

public function get Version () : DataCacheItemVersion

Property Value

The DataCacheItemVersion.

Remarks

The DataCacheItemVersion is updated every time the object is updated. Only the latest version of the object is stored on the cache cluster. Due to the distributed nature of the cluster, the cache client may not have the latest copy of the object. For this reason, the DataCacheItemVersion class is essential for concurrency operations. For more information, see Concurrency Models (Velocity) and Concurrency Methods (Velocity). When using cache notifications, the DataCacheItemVersion object corresponding to an item-related cache operation can be returned to your application with the version parameter of the DataCacheNotificationCallback delegate method. For more information, see Cache Notifications (Velocity).

Thread Safety

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

Platforms

Development Platforms

Visual Studio 2010 and later, .NET Framework 4

Target Platforms

Windows 7; Windows Server 2008 R2; Windows Server 2008 Service Pack 2; Windows Vista Service Pack 2

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