RollbackTrans Method
BeginTransComplete Event
CommitTransComplete Event
Connection Object
Attributes Property
Properties Collection
EVENT: Connection::RollbackTransComplete
RollbackTransComplete
pError, adStatus, pConnection
The
RollbackTransComplete
event can be fired after a
RollbackTrans
method call is completed. This event is one of three transaction management events that can be called. The other two are
BeginTransComplete
and
CommitTransComplete
.
An event is simply a subroutine that can be called automatically after a specific operation has occurred. This subroutine can contain any code that you need to run when the event occurs. The subroutine will only be called if it is included in your code. Future calls to the event subroutine can be cancelled by setting the
adStatus
parameter to be the
adStatusUnwantedEvent
constant (see table below) before the event returns.
There are three parameters that are passed to this event.
The
pError
parameter is an
Error
object that contains information about the occurrence of any errors and/or warnings. This parameter requires that the
adStatus
parameter be set to the
adStatusErrorsOccurred
constant, otherwise the
Error
object is not created.
The
adStatus
parameter is one of the
EventStatusEnum
constants and defines the status of the event. If the
RollbackTrans
operation that causes the event to fire was successful, this parameter is set to
adStatusOK
. If the
RollbackTrans
operation was not successful, this parameter is set to
adStatusErrorsOccurred
.
EventStatusEnum Constants
Constant
Value
Description
adStatusCancel
4
Cancels the operation that fired the event
adStatusCantDeny
3
Cannot cancel pending operation
adStatusErrorsOccurred
2
Indicates that warnings and/or errors occurred
adStatusOK
1
The operation that fired the event was successful
adStatusUnwantedEvent
5
The operation that generated the event cannot generate future events
The
pConnection
parameter is the
Connection
object that is associated with the
RollbackTrans
method call that fired the event.
Code (Visual Basic):
' Use the WithEvents keyword to designate that events
' can be handled by this Connection object
Dim WithEvents objConn As ADODB.Connection
' Note how the object name, objConn, is incorporated into the event Sub name
Private Sub objConn_
RollbackTransComplete
( ByVal pError As ADODB.Error, _
adStatus As ADODB.EventStatusEnum, _
ByVal pConnection As ADODB.Connection )
' place any code you desire here, for example
If adStatus = adStatusOK Then
Print "Rollback completed"
Else
Print "Rollback Status = " & adStatus
End If
End Sub
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