Transaction.TransactionCompleted Événement

Définition

Espace de noms:

System.Transactions

Assembly:

System.Transactions.Local.dll

Source:

Transaction.cs

Indique que la transaction est terminée.

public:
 event System::Transactions::TransactionCompletedEventHandler ^ TransactionCompleted;

public event System.Transactions.TransactionCompletedEventHandler? TransactionCompleted;

member this.TransactionCompleted : System.Transactions.TransactionCompletedEventHandler 

Public Custom Event TransactionCompleted As TransactionCompletedEventHandler 

Type d'événement

TransactionCompletedEventHandler

Exceptions

ObjectDisposedException

Tentative de s'abonner à cet événement sur une transaction qui a été supprimée.

Exemples

L’exemple suivant montre comment une application peut obtenir le résultat d’une transaction en s’abonnant à l’événement TransactionCompleted .

static void Main(string[] args)
{
    try
    {
        //Create the transaction scope
        using (TransactionScope scope = new TransactionScope())
        {
            //Register for the transaction completed event for the current transaction
            Transaction.Current.TransactionCompleted += new TransactionCompletedEventHandler(Current_TransactionCompleted);

            //Call complete on the TransactionScope based on console input
            ConsoleKeyInfo c;
            while (true)
            {
                Console.Write("Complete the transaction scope? [Y|N] ");
                c = Console.ReadKey();
                Console.WriteLine();

                if ((c.KeyChar == 'Y') || (c.KeyChar == 'y'))
                {
                    scope.Complete();
                    break;
                }
                else if ((c.KeyChar == 'N') || (c.KeyChar == 'n'))
                {
                    break;
                }
            }
        }
    }
    catch (System.Transactions.TransactionException ex)
    {
        Console.WriteLine(ex);
    }
    catch
    {
        Console.WriteLine("Cannot complete transaction");
        throw;
    }
}

//Transaction completed event handler
static void Current_TransactionCompleted(object sender, TransactionEventArgs e)
{
    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);
}

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
Private 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

Remarques

Vous pouvez vous inscrire à cet événement au lieu d’utiliser un enrôlement volatile pour obtenir des informations sur les résultats des transactions. Le paramètre passé au TransactionCompletedEventHandler délégué est un Transaction instance. Vous pouvez ensuite interroger la TransactionInformation propriété du instance spécifique pour obtenir une instance de TransactionInformation, dont Status la propriété contient le status d’une transaction avec la Committed valeur ouAborted.

Attention L’inscription à cet événement affecte négativement les performances de la transaction à laquelle il est attaché.