Transaction.EnlistVolatile Methode

public:
 System::Transactions::Enlistment ^ EnlistVolatile(System::Transactions::IEnlistmentNotification ^ enlistmentNotification, System::Transactions::EnlistmentOptions enlistmentOptions);

public:
 System::Transactions::Enlistment ^ EnlistVolatile(System::Transactions::IEnlistmentNotification ^ notification, System::Transactions::EnlistmentOptions options);

public System.Transactions.Enlistment EnlistVolatile (System.Transactions.IEnlistmentNotification enlistmentNotification, System.Transactions.EnlistmentOptions enlistmentOptions);

public System.Transactions.Enlistment EnlistVolatile (System.Transactions.IEnlistmentNotification notification, System.Transactions.EnlistmentOptions options);

member this.EnlistVolatile : System.Transactions.IEnlistmentNotification * System.Transactions.EnlistmentOptions -> System.Transactions.Enlistment

member this.EnlistVolatile : System.Transactions.IEnlistmentNotification * System.Transactions.EnlistmentOptions -> System.Transactions.Enlistment

Public Function EnlistVolatile (enlistmentNotification As IEnlistmentNotification, enlistmentOptions As EnlistmentOptions) As Enlistment

Public Function EnlistVolatile (notification As IEnlistmentNotification, options As EnlistmentOptions) As Enlistment

Parameter

Gibt zurück

Enlistment

Ein Enlistment-Objekt, das die Eintragung beschreibt.

Beispiele

Im folgenden Beispiel wird eine Implementierung der Schnittstelle sowie die Auflistung des IEnlistmentNotification Objekts als Teilnehmer in einer Transaktion mithilfe der EnlistVolatile Methode gezeigt.

static void Main(string[] args)
{
    try
    {
        using (TransactionScope scope = new TransactionScope())
        {
        
            //Create an enlistment object
            myEnlistmentClass myElistment = new myEnlistmentClass();

            //Enlist on the current transaction with the enlistment object
            Transaction.Current.EnlistVolatile(myElistment, EnlistmentOptions.None);

            //Perform transactional work here.

            //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;
    }
}

class myEnlistmentClass : IEnlistmentNotification
{
    public void Prepare(PreparingEnlistment preparingEnlistment)
    {
        Console.WriteLine("Prepare notification received");

        //Perform transactional work

        //If work finished correctly, reply prepared
        preparingEnlistment.Prepared();

        // otherwise, do a ForceRollback
        preparingEnlistment.ForceRollback();
    }

    public void Commit(Enlistment enlistment)
    {
        Console.WriteLine("Commit notification received");

        //Do any work necessary when commit notification is received

        //Declare done on the enlistment
        enlistment.Done();
    }

    public void Rollback(Enlistment enlistment)
    {
        Console.WriteLine("Rollback notification received");

        //Do any work necessary when rollback notification is received

        //Declare done on the enlistment
        enlistment.Done();
    }

    public void InDoubt(Enlistment enlistment)
    {
        Console.WriteLine("In doubt notification received");

        //Do any work necessary when indout notification is received
        
        //Declare done on the enlistment
        enlistment.Done();
    }
}

    Public Shared Sub Main()
        Try
            Using scope As TransactionScope = New TransactionScope()

                'Create an enlistment object
                Dim myEnlistmentClass As New EnlistmentClass

                'Enlist on the current transaction with the enlistment object
                Transaction.Current.EnlistVolatile(myEnlistmentClass, EnlistmentOptions.None)

                '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
End Class

Public Class EnlistmentClass
    Implements IEnlistmentNotification

    Public Sub Prepare(ByVal myPreparingEnlistment As PreparingEnlistment) Implements System.Transactions.IEnlistmentNotification.Prepare
        Console.WriteLine("Prepare notification received")

        'Perform transactional work

        'If work finished correctly, reply with prepared
        myPreparingEnlistment.Prepared()
    End Sub

    Public Sub Commit(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Commit
        Console.WriteLine("Commit notification received")

        'Do any work necessary when commit notification is received

        'Declare done on the enlistment
        myEnlistment.Done()
    End Sub

    Public Sub Rollback(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Rollback
        Console.WriteLine("Rollback notification received")

        'Do any work necessary when rollback notification is received

        'Declare done on the enlistment
        myEnlistment.Done()
    End Sub

    Public Sub InDoubt(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.InDoubt
        Console.WriteLine("In doubt notification received")

        'Do any work necessary when indout notification is received

        'Declare done on the enlistment
        myEnlistment.Done()
    End Sub
End Class

Hinweise

Veränderliche Ressourcenmanager können keine Wiederherstellung durch Fehler beim Abschließen einer Transaktion durchführen, an der sie teilnehmen. Verwenden Sie die EnlistDurable Methode, um eine dauerhafte Einlistung in einer Transaktion abzurufen.

Ressourcenmanager, die für die Teilnahme an einer Transaktion über diese Methode aufgelistet sind, erhalten zwei Phasen-Commitbenachrichtigungen, die den methoden entsprechen, die auf der IEnlistmentNotification Schnittstelle definiert sind.

public:
 System::Transactions::Enlistment ^ EnlistVolatile(System::Transactions::ISinglePhaseNotification ^ singlePhaseNotification, System::Transactions::EnlistmentOptions enlistmentOptions);

public:
 System::Transactions::Enlistment ^ EnlistVolatile(System::Transactions::ISinglePhaseNotification ^ notification, System::Transactions::EnlistmentOptions options);

public System.Transactions.Enlistment EnlistVolatile (System.Transactions.ISinglePhaseNotification singlePhaseNotification, System.Transactions.EnlistmentOptions enlistmentOptions);

public System.Transactions.Enlistment EnlistVolatile (System.Transactions.ISinglePhaseNotification notification, System.Transactions.EnlistmentOptions options);

member this.EnlistVolatile : System.Transactions.ISinglePhaseNotification * System.Transactions.EnlistmentOptions -> System.Transactions.Enlistment

member this.EnlistVolatile : System.Transactions.ISinglePhaseNotification * System.Transactions.EnlistmentOptions -> System.Transactions.Enlistment

Public Function EnlistVolatile (singlePhaseNotification As ISinglePhaseNotification, enlistmentOptions As EnlistmentOptions) As Enlistment

Public Function EnlistVolatile (notification As ISinglePhaseNotification, options As EnlistmentOptions) As Enlistment

Parameter

Gibt zurück

Enlistment

Ein Enlistment-Objekt, das die Eintragung beschreibt.

Hinweise

Veränderliche Ressourcenmanager können keine Wiederherstellung von fehlern, um eine Transaktion abzuschließen, an der sie beteiligt waren. Verwenden Sie die EnlistDurable Methode, um eine dauerhafte Liste in einer Transaktion abzurufen. Weitere Informationen zu veränderbaren und dauerhaften Ressourcen sowie zum Auflisten einer Ressource finden Sie unter Implementieren einer Resource Manager. Weitere Informationen dazu, wie ein Ressourcenmanager auf commitbenachrichtigung reagiert und den Commit vorbereitet, finden Sie unter Commit A Transaction In Single-Phase und Multi-Phase.

Sie sollten beachten, dass auch wenn Ihre Ressourcen-Manager-Implementierung mit dieser Methode listet, ist es nicht garantiert, dass ein einzelner Phase-Commit empfangen wird. Der Transaktions-Manager kann stattdessen weiterhin zwei Phasen-Commitbenachrichtigungen senden. Weitere Informationen zur Optimierung des einzelnen Phasen-Commits finden Sie unter "Optimierung mithilfe von Single Phase Commit" und "Promotable Single Phase Notification".

Siehe auch

• Implementieren eines Ressourcen-Managers