OracleTransaction.Rollback Yöntem

Tanım

Ad Alanı:
System.Data.OracleClient
Bütünleştirilmiş Kod:
System.Data.OracleClient.dll

Bekleyen durumdan bir işlemi geri alır.

public:
 virtual void Rollback();
public:
 override void Rollback();
public void Rollback();
public override void Rollback();
abstract member Rollback : unit -> unit
override this.Rollback : unit -> unit
override this.Rollback : unit -> unit
Public Sub Rollback ()
Public Overrides Sub Rollback ()

Uygulamalar

Rollback()

Özel durumlar

Exception

İşlem işlemeye çalışılırken bir hata oluştu.

InvalidOperationException

İşlem zaten işlendi veya geri alındı.

-veya-

Bağlantı kesildi.

Örnekler

Aşağıdaki örnek bir OracleConnection ve OracleTransactionoluşturur. Ayrıca , BeginTransactionve Commit yöntemlerinin Rollbacknasıl kullanılacağını da gösterir.

public void RunOracleTransaction(string connectionString)
{
    using (OracleConnection connection = new OracleConnection(connectionString))
    {
        connection.Open();

        OracleCommand command = connection.CreateCommand();
        OracleTransaction transaction;

        // Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
        // Assign transaction object for a pending local transaction
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')";
            command.ExecuteNonQuery();
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')";
            command.ExecuteNonQuery();
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception e)
        {
            transaction.Rollback();
            Console.WriteLine(e.ToString());
            Console.WriteLine("Neither record was written to database.");
        }
    }
}

Public Sub RunOracleTransaction(ByVal connectionString As String)
    Using connection As New OracleConnection(connectionString)
        connection.Open()

        Dim command As OracleCommand = connection.CreateCommand()
        Dim transaction As OracleTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted)
        ' Assign transaction object for a pending local transaction
        command.Transaction = transaction

        Try
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')"
            command.ExecuteNonQuery()
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")
        Catch e As Exception
            transaction.Rollback()
            Console.WriteLine(e.ToString())
            Console.WriteLine("Neither record was written to database.")
        End Try
    End Using
End Sub

Açıklamalar

İşlem yalnızca bekleme durumundan geri alınabilir (çağrıldıktan sonra BeginTransaction ancak çağrılmadan önce Commit ).

Şunlara uygulanır

Ayrıca bkz.