Transaction.TransactionCompleted Event
Assembly: System.Transactions (in system.transactions.dll)
'Declaration Public Event TransactionCompleted As TransactionCompletedEventHandler 'Usage Dim instance As Transaction Dim handler As TransactionCompletedEventHandler AddHandler instance.TransactionCompleted, handler
/** @event */ public void add_TransactionCompleted (TransactionCompletedEventHandler value) /** @event */ public void remove_TransactionCompleted (TransactionCompletedEventHandler value)
JScript supports the use of events, but not the declaration of new ones.
You can register for this event instead of using a volatile enlistment to get outcome information for transactions. The parameter passed to the TransactionCompletedEventHandler delegate is a Transaction instance. You can then query the TransactionInformation property of the specific instance to get an instance of TransactionInformation, whose Status property contains the status of a transaction with either the Committed or Aborted value.
Caution Signing up for this event negatively affects the performance of the transaction it is attached to.
The following sample shows how an application can obtain the outcome of a transaction by subscribing to the TransactionCompleted event.
Public Shared Sub Main() Try Using scope As TransactionScope = New TransactionScope() 'Register for the transaction completed event for the current transaction AddHandler Transaction.Current.TransactionCompleted, AddressOf Current_TransactionCompleted 'Perform transactional work here. 'Call complete on the TransactionScope based on console input Dim c As ConsoleKeyInfo While (True) Console.Write("Complete the transaction scope? [Y|N] ") c = Console.ReadKey() Console.WriteLine() If (c.KeyChar = "Y") Or (c.KeyChar = "y") Then scope.Complete() Exit While ElseIf ((c.KeyChar = "N") Or (c.KeyChar = "n")) Then Exit While End If End While End Using Catch ex As TransactionException Console.WriteLine(ex) Catch Console.WriteLine("Cannot complete transaction") Throw End Try End Sub 'Transaction completed event handler Public Shared Sub Current_TransactionCompleted(ByVal sender As Object, ByVal e As TransactionEventArgs) Console.WriteLine("A transaction has completed:") Console.WriteLine("ID: {0}", e.Transaction.TransactionInformation.LocalIdentifier) Console.WriteLine("Distributed ID: {0}", e.Transaction.TransactionInformation.DistributedIdentifier) Console.WriteLine("Status: {0}", e.Transaction.TransactionInformation.Status) Console.WriteLine("IsolationLevel: {0}", e.Transaction.IsolationLevel) End Sub
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.