通过

LogProviderBase.CanUpdate Method

  • 项目

Determines whether a log provider supports upgrading the package XML to a newer version of the log provider.

命名空间: Microsoft.SqlServer.Dts.Runtime
程序集: Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

语法

声明
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

参数

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

返回值

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

备注

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.

线程安全

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.

平台

开发平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

目标平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

请参阅

参考

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