OdbcConnection.BeginTransaction Método

Definición

Espacio de nombres:

System.Data.Odbc

Ensamblado:

System.Data.Odbc.dll

Paquete:

System.Data.Odbc v9.0.0-rc.2.24473.5

Inicia una transacción en el origen de datos.

Sobrecargas

BeginTransaction()	Inicia una transacción en el origen de datos.
BeginTransaction(IsolationLevel)	Inicia una transacción en el origen de datos con el valor de IsolationLevel especificado.

BeginTransaction()

Inicia una transacción en el origen de datos.

public:
 System::Data::Odbc::OdbcTransaction ^ BeginTransaction();

public System.Data.Odbc.OdbcTransaction BeginTransaction ();

override this.BeginTransaction : unit -> System.Data.Odbc.OdbcTransaction

Public Function BeginTransaction () As OdbcTransaction

Devoluciones

OdbcTransaction

Objeto que representa la nueva transacción.

Excepciones

InvalidOperationException

Hay transacción activa actualmente. No se admiten transacciones paralelas.

Ejemplos

En el ejemplo siguiente se crea un OdbcConnection objeto y .OdbcTransaction También muestra cómo usar los BeginTransactionmétodos , Commity Rollback .

public static void ExecuteTransaction(string connectionString)
{
    using (OdbcConnection connection =
               new OdbcConnection(connectionString))
    {
        OdbcCommand command = new OdbcCommand();
        OdbcTransaction transaction = null;

        // Set the Connection to the new OdbcConnection.
        command.Connection = connection;

        // Open the connection and execute the transaction.
        try
        {
            connection.Open();

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

            // Assign transaction object for a pending local transaction.
            command.Connection = connection;
            command.Transaction = transaction;

            // Execute the commands.
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            try
            {
                // Attempt to roll back the transaction.
                transaction.Rollback();
            }
            catch
            {
                // Do nothing here; transaction is not active.
            }
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
}

Public Sub ExecuteTransaction(ByVal connectionString As String)

    Using connection As New OdbcConnection(connectionString)
        Dim command As New OdbcCommand()
        Dim transaction As OdbcTransaction

        ' Set the Connection to the new OdbcConnection.
        command.Connection = connection

        ' Open the connection and execute the transaction.
        Try
            connection.Open()

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

            ' Assign transaction object for a pending local transaction.
            command.Connection = connection
            command.Transaction = transaction

            ' Execute the commands.
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
            command.ExecuteNonQuery()

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

        Catch ex As Exception
            Console.WriteLine(ex.Message)
            ' Try to rollback the transaction
            Try
                transaction.Rollback()

            Catch
                ' Do nothing here; transaction is not active.
            End Try
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using
End Sub

Comentarios

Para confirmar o revertir la transacción, debe usar explícitamente los Commit métodos o Rollback .

Para asegurarse de que el modelo de administración de transacciones ODBC del proveedor de datos de .NET Framework funciona correctamente, evite usar otros modelos de administración de transacciones, como los proporcionados por el origen de datos.

Nota

Si no especifica un nivel de aislamiento, el controlador que se va a usar determinará el nivel de aislamiento. Para especificar un nivel de aislamiento con el BeginTransaction método , use la sobrecarga que toma el isolevel parámetro .

Consulte también

• Conectarse a orígenes de datos

BeginTransaction(IsolationLevel)

Inicia una transacción en el origen de datos con el valor de IsolationLevel especificado.

public:
 System::Data::Odbc::OdbcTransaction ^ BeginTransaction(System::Data::IsolationLevel isolevel);

public System.Data.Odbc.OdbcTransaction BeginTransaction (System.Data.IsolationLevel isolevel);

override this.BeginTransaction : System.Data.IsolationLevel -> System.Data.Odbc.OdbcTransaction

Public Function BeginTransaction (isolevel As IsolationLevel) As OdbcTransaction

Parámetros

isolevel

IsolationLevel

Nivel de aislamiento de transacción de esta conexión. Si no se especifica un nivel de aislamiento, se utiliza el predeterminado del controlador.

Devoluciones

OdbcTransaction

Objeto que representa la nueva transacción.

Excepciones

InvalidOperationException

Hay transacción activa actualmente. No se admiten transacciones paralelas.

Ejemplos

En el ejemplo siguiente se crea un OdbcConnection objeto y .OdbcTransaction También muestra cómo usar los BeginTransactionmétodos , Commity Rollback .

public static void ExecuteTransaction(string connectionString)
{
    using (OdbcConnection connection =
               new OdbcConnection(connectionString))
    {
        OdbcCommand command = new OdbcCommand();
        OdbcTransaction transaction = null;

        // Set the Connection to the new OdbcConnection.
        command.Connection = connection;

        // Open the connection and execute the transaction.
        try
        {
            connection.Open();

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

            // Assign transaction object for a pending local transaction.
            command.Connection = connection;
            command.Transaction = transaction;

            // Execute the commands.
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            try
            {
                // Attempt to roll back the transaction.
                transaction.Rollback();
            }
            catch
            {
                // Do nothing here; transaction is not active.
            }
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
}

Public Sub ExecuteTransaction(ByVal connectionString As String)

    Using connection As New OdbcConnection(connectionString)
        Dim command As New OdbcCommand()
        Dim transaction As OdbcTransaction

        ' Set the Connection to the new OdbcConnection.
        command.Connection = connection

        ' Open the connection and execute the transaction.
        Try
            connection.Open()

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

            ' Assign transaction object for a pending local transaction.
            command.Connection = connection
            command.Transaction = transaction

            ' Execute the commands.
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
            command.ExecuteNonQuery()

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

        Catch ex As Exception
            Console.WriteLine(ex.Message)
            ' Try to rollback the transaction
            Try
                transaction.Rollback()

            Catch
                ' Do nothing here; transaction is not active.
            End Try
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using
End Sub

Comentarios

Para confirmar o revertir la transacción, debe usar explícitamente los Commit métodos o Rollback .

Para asegurarse de que el modelo de administración de transacciones ODBC del proveedor de datos de .NET Framework funciona correctamente, evite usar otros modelos de administración de transacciones, como los proporcionados por el origen de datos.

Consulte también

• Conectarse a orígenes de datos