SqlTransaction.Rollback Méthode

Source:

System.Data.SqlClient.notsupported.cs

public:
 override void Rollback();

public:
 virtual void Rollback();

public override void Rollback ();

public void Rollback ();

override this.Rollback : unit -> unit

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

Public Overrides Sub Rollback ()

Public Sub Rollback ()

Implémente

Exceptions

Exemples

L’exemple suivant crée un SqlConnection et un SqlTransaction. Il montre également comment utiliser les BeginTransactionméthodes , Commitet .Rollback La transaction est restaurée en cas d’erreur. Try / Catch la gestion des erreurs est utilisée pour gérer les erreurs lors de la tentative de validation ou de restauration de la 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();

        // 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

Remarques

La Rollback méthode équivaut à l’instruction Transact-SQL ROLLBACK TRANSACTION. Pour plus d’informations, consultez ROLLBACK TRANSACTION (Transact-SQL) .

La transaction ne peut être restaurée qu’à partir d’un état en attente (après BeginTransaction a été appelé, mais avant Commit est appelé). La transaction est restaurée dans le cas où elle est supprimée avant Commit ou Rollback est appelée.

Pour plus d’informations sur les transactions SQL Server, consultez Transactions (Transact-SQL).

Voir aussi

• Transactions locales
• Vue d'ensemble d’ADO.NET

Source:

System.Data.SqlClient.notsupported.cs

public:
 void Rollback(System::String ^ transactionName);

public void Rollback (string transactionName);

override this.Rollback : string -> unit

member this.Rollback : string -> unit

Public Sub Rollback (transactionName As String)

Paramètres

Exceptions

Exemples

L’exemple suivant crée un SqlConnection et un SqlTransaction. Il montre également comment utiliser les BeginTransactionméthodes , Commitet .Rollback La transaction est restaurée en cas d’erreur. Try / Catch la gestion des erreurs est utilisée pour gérer les erreurs lors de la tentative de validation ou de restauration de la 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("SampleTransaction");
            }
            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("SampleTransaction")

            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

Remarques

La Rollback méthode équivaut à l’instruction Transact-SQL ROLLBACK TRANSACTION. Pour plus d’informations, consultez Transactions (Transact-SQL).

La transaction ne peut être restaurée qu’à partir d’un état en attente (après BeginTransaction a été appelé, mais avant Commit est appelé). La transaction est restaurée si elle est supprimée avant Commit ou Rollback est appelée.

Pour plus d’informations sur les transactions SQL Server, consultez Transactions (Transact-SQL).

Voir aussi

• Exécution d’une transaction
• Vue d'ensemble d’ADO.NET