SqlTransaction.Rollback SqlTransaction.Rollback SqlTransaction.Rollback SqlTransaction.Rollback Method

Definizione

Esegue il rollback di una transazione da uno stato in sospeso.Rolls back a transaction from a pending state.

Overload

Rollback() Rollback() Rollback() Rollback()

Esegue il rollback di una transazione da uno stato in sospeso.Rolls back a transaction from a pending state.

Rollback(String) Rollback(String) Rollback(String) Rollback(String)

Esegue il rollback di una transazione da uno stato in sospeso e specifica la transazione o il nome del punto di salvataggio.Rolls back a transaction from a pending state, and specifies the transaction or savepoint name.

Rollback() Rollback() Rollback() Rollback()

Esegue il rollback di una transazione da uno stato in sospeso.Rolls back a transaction from a pending state.

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

Implementazioni

Eccezioni

Si è verificato un errore durante il tentativo di eseguire il commit della transazione.An error occurred while trying to commit the transaction.

È già stato eseguito il rollback o il commit della transazione.The transaction has already been committed or rolled back.

-oppure--or-

La connessione non funziona.The connection is broken.

Esempi

Nell'esempio seguente vengono creati SqlConnection un oggetto SqlTransactione un oggetto.The following example creates a SqlConnection and a SqlTransaction. Viene inoltre illustrato come utilizzare i BeginTransactionmetodi, Commite. RollbackIt also demonstrates how to use the BeginTransaction, Commit, and Rollback methods. Viene eseguito il rollback della transazione in caso di errore.The transaction is rolled back on any error. Try/Catchla gestione degli errori viene utilizzata per gestire eventuali errori durante il tentativo di eseguire il commit o il rollback della transazione.Try/Catch error handling is used to handle any errors when attempting to commit or roll back the transaction.

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("SampleTransaction");

        // 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("SampleTransaction")

        ' 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

Commenti

Il Rollback metodo è equivalente all'istruzione Transact-SQL ROLLBACK TRANSACTION.The Rollback method is equivalent to the Transact-SQL ROLLBACK TRANSACTION statement. Per ulteriori informazioni, vedere Rollback Transaction (Transact-SQL) .For more information, see ROLLBACK TRANSACTION (Transact-SQL) .

È possibile eseguire il rollback della transazione solo da uno stato in sospeso ( BeginTransaction dopo che è stato chiamato, Commit ma prima che venga chiamato).The transaction can only be rolled back from a pending state (after BeginTransaction has been called, but before Commit is called). Viene eseguito il rollback della transazione nel caso in cui venga eliminata prima Commit o Rollback dopo la chiamata a.The transaction is rolled back in the event it is disposed before Commit or Rollback is called.

Nota

Try/Catchper eseguire il rollback di una transazione, è sempre consigliabile utilizzare la gestione delle eccezioni.Try/Catch exception handling should always be used when rolling back a transaction. Un Rollback oggetto genera InvalidOperationException un'istruzione se la connessione viene terminata o se è già stato eseguito il rollback della transazione nel server.A Rollback generates an InvalidOperationException if the connection is terminated or if the transaction has already been rolled back on the server.

Per ulteriori informazioni sulle transazioni di SQL Server, vedere Transactions (Transact-SQL).For more information on SQL Server transactions, see Transactions (Transact-SQL).

Vedi anche

Rollback(String) Rollback(String) Rollback(String) Rollback(String)

Esegue il rollback di una transazione da uno stato in sospeso e specifica la transazione o il nome del punto di salvataggio.Rolls back a transaction from a pending state, and specifies the transaction or savepoint name.

public:
 void Rollback(System::String ^ transactionName);
public void Rollback (string transactionName);
member this.Rollback : string -> unit
Public Sub Rollback (transactionName As String)

Parametri

transactionName
String String String String

Nome della transazione di cui eseguire il rollback o punto di salvataggio a cui eseguire il rollback.The name of the transaction to roll back, or the savepoint to which to roll back.

Eccezioni

Non è stato specificato alcun nome di transazione.No transaction name was specified.

È già stato eseguito il rollback o il commit della transazione.The transaction has already been committed or rolled back.

-oppure--or-

La connessione non funziona.The connection is broken.

Esempi

Nell'esempio seguente vengono creati SqlConnection un oggetto SqlTransactione un oggetto.The following example creates a SqlConnection and a SqlTransaction. Viene inoltre illustrato come utilizzare i BeginTransactionmetodi, Commite. RollbackIt also demonstrates how to use the BeginTransaction, Commit, and Rollback methods. Viene eseguito il rollback della transazione in caso di errore.The transaction is rolled back on any error. Try/Catchla gestione degli errori viene utilizzata per gestire eventuali errori durante il tentativo di eseguire il commit o il rollback della transazione.Try/Catch error handling is used to handle any errors when attempting to commit or roll back the transaction.

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("SampleTransaction");

        // 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("SampleTransaction")

        ' 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("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

Commenti

Il Rollback metodo è equivalente all'istruzione Transact-SQL ROLLBACK TRANSACTION.The Rollback method is equivalent to the Transact-SQL ROLLBACK TRANSACTION statement. Per ulteriori informazioni, vedere Transactions (Transact-SQL).For more information, see Transactions (Transact-SQL).

È possibile eseguire il rollback della transazione solo da uno stato in sospeso ( BeginTransaction dopo che è stato chiamato, Commit ma prima che venga chiamato).The transaction can only be rolled back from a pending state (after BeginTransaction has been called, but before Commit is called). Viene eseguito il rollback della transazione se viene eliminata prima o Commit Rollback dopo la chiamata a.The transaction is rolled back if it is disposed before Commit or Rollback is called.

Nota

Try/Catchper eseguire il rollback di una transazione, è sempre consigliabile utilizzare la gestione delle eccezioni.Try/Catch exception handling should always be used when rolling back a transaction. Un Rollback oggetto genera InvalidOperationException un'istruzione se la connessione viene terminata o se è già stato eseguito il rollback della transazione nel server.A Rollback generates an InvalidOperationException if the connection is terminated or if the transaction has already been rolled back on the server.

Per ulteriori informazioni sulle transazioni di SQL Server, vedere Transactions (Transact-SQL).For more information on SQL Server transactions, see Transactions (Transact-SQL).

Vedi anche

Si applica a