Sets the backup stamp of an earlier backup operation, upon which a differential or incremental backup operation will be based.
The method can be called only during a backup operation.
void SetPreviousBackupStamp( Guid writerId, VssComponentType componentType, string logicalPath, string componentName, string previousBackupStamp )
Sub SetPreviousBackupStamp ( writerId As Guid, componentType As VssComponentType, logicalPath As String, componentName As String, previousBackupStamp As String )
void SetPreviousBackupStamp( Guid writerId, VssComponentType componentType, String^ logicalPath, String^ componentName, String^ previousBackupStamp )
The logical path of the component. For more information, see Logical Pathing of Components.
The value of the string containing the logical path used here should be the same as was used when the component was added to the backup set using AddComponent(Guid, Guid, VssComponentType, String, String).
The logical path can be .
There are no restrictions on the characters that can appear in a non-null logical path.
The name of the component.
The value of the string should not be , and should contain the same component as was used when the component was added to the backup set using AddComponent(Guid, Guid, VssComponentType, String, String).
|ArgumentNullException||One of the arguments that cannot be was|
|ArgumentException||One of the parameter values is not valid.|
|OutOfMemoryException||Out of memory or other system resources.|
|SystemException||Unexpected VSS system error. The error code is logged in the event log.|
|VssBadStateException||The backup components object is not initialized, this method has been called during a restore operation, or this method has not been called within the correct sequence.|
|VssObjectNotFoundException||The backup component does not exist.|
|VssInvalidXmlDocumentException||The XML document is not valid. Check the event log for details.|
This method should be called before PrepareForBackup.
Only requesters can call this method.
The backup stamp set byapplies to all files in the component and any nonselectable Subcomponents it has.
Requesters merely store the backup stamps in the Backup Components Document. They cannot make direct use of the backup stamps, do not know their format, and do not know how to generate them.
Therefore, the value set with BackupStamp for the correct component), or from information stored by the requester into its own internal records.should either be retrieved from the stored Backup Components Document of an earlier backup operation (using
A writer will then obtain this value (using IVssComponent::GetPreviousBackupStamp) and using it will be able to mark the appropriate files for participation in an incremental or differential backup.