SqlTransaction.Commit Methode

public:
 override void Commit();

public:
 virtual void Commit();

public override void Commit();

public void Commit();

override this.Commit : unit -> unit

abstract member Commit : unit -> unit
override this.Commit : unit -> unit

Public Overrides Sub Commit ()

Public Sub Commit ()

Implementiert

Ausnahmen

Beispiele

Im folgenden Beispiel wird eine SqlConnection und eine SqlTransaction. Außerdem wird veranschaulicht, wie die CommitMethoden und BeginTransactionRollback Methoden verwendet werden. Die Transaktion wird bei einem Fehler zurückgesetzt. Try / Catch Die Fehlerbehandlung wird verwendet, um Fehler beim Ausführen eines Commits oder Rollbacks der Transaktion zu behandeln.

private static void ExecuteSqlTransaction(string connectionString)
{
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();

        SqlCommand command = connection.CreateCommand();
        SqlTransaction transaction;

        // Start a local transaction.
        transaction = connection.BeginTransaction();

        // Must assign both transaction object and connection
        // to Command object for a pending local transaction
        command.Connection = connection;
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Attempt to commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType());
            Console.WriteLine("  Message: {0}", ex.Message);

            // Attempt to roll back the transaction.
            try
            {
                transaction.Rollback();
            }
            catch (Exception ex2)
            {
                // This catch block will handle any errors that may have occurred
                // on the server that would cause the rollback to fail, such as
                // a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType());
                Console.WriteLine("  Message: {0}", ex2.Message);
            }
        }
    }
}

Private Sub ExecuteSqlTransaction(ByVal connectionString As String)
    Using connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As SqlCommand = connection.CreateCommand()
        Dim transaction As SqlTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction()

        ' Must assign both transaction object and connection
        ' to Command object for a pending local transaction.
        command.Connection = connection
        command.Transaction = transaction

        Try
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"

            command.ExecuteNonQuery()

            ' Attempt to commit the transaction.
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")

        Catch ex As Exception
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType())
            Console.WriteLine("  Message: {0}", ex.Message)

            ' Attempt to roll back the transaction.
            Try
                transaction.Rollback()

            Catch ex2 As Exception
                ' This catch block will handle any errors that may have occurred
                ' on the server that would cause the rollback to fail, such as
                ' a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType())
                Console.WriteLine("  Message: {0}", ex2.Message)
            End Try
        End Try
    End Using
End Sub

Hinweise

Die methode Commit entspricht der Transact-SQL COMMIT TRANSACTION-Anweisung. Sie können ein Rollback einer Transaktion nicht rückgängig machen, nachdem sie zugesichert wurde, da alle Änderungen zu einem dauerhaften Bestandteil der Datenbank geworden sind. Weitere Informationen finden Sie unter COMMIT TRANSACTION (Transact-SQL) .

Weitere Informationen zu SQL Server Transaktionen finden Sie unter Transactions (Transact-SQL).

Weitere Informationen

• Lokale Transaktionen
• Übersicht über ADO.NET