LogProviderBase.CanUpdate Method

Determines whether a log provider supports upgrading the package XML to a newer version of the log provider.

Пространство имен: Microsoft.SqlServer.Dts.Runtime
Сборка: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Синтаксис

'Декларация
Public Overridable Function CanUpdate ( _
    CreationName As String _
) As Boolean

public virtual bool CanUpdate (
    string CreationName
)

public:
virtual bool CanUpdate (
    String^ CreationName
)

public boolean CanUpdate (
    String CreationName
)

public function CanUpdate (
    CreationName : String
) : boolean

Параметры

• CreationName
  The string used to create an instance of the object.

Возвращаемое значение

true if the log provider specified in the CreationName parameter is able to update its object metadata; otherwise, false. The default is false.

Замечания

You override this method in your log provider when shipping a newer version of your log provider that is capable of updating the package XML of the log provider. If you return true the runtime engine will call your Update method to update the package XML for your log provider.

For example, you deploy version A of your log provider and store some custom properties in the package XML by overriding the SaveToXml method. At a future date, you ship version B of your log provider that no longer supports this property, and instead has a newer property. When the runtime engine finds that the Version property of the log provider contained in a package is A, but the log provider installed on the computer is B, it calls this method to see if your log provider is capable of updating the package XML. If you return true, the runtime engine calls the Update method, allowing you to update the XML.

Синхронизация потоков

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

Платформы

Платформы разработки

Список поддерживаемых платформ см. в разделе Hardware and Software Requirements for Installing SQL Server 2005.

Целевые платформы

Список поддерживаемых платформ см. в разделе Hardware and Software Requirements for Installing SQL Server 2005.

См. также

Справочник

LogProviderBase Class
LogProviderBase Members
Microsoft.SqlServer.Dts.Runtime Namespace