OdbcTransaction Classe

Definição

public ref class OdbcTransaction sealed : MarshalByRefObject, IDisposable, System::Data::IDbTransaction

public ref class OdbcTransaction sealed : System::Data::Common::DbTransaction

public sealed class OdbcTransaction : MarshalByRefObject, IDisposable, System.Data.IDbTransaction

public sealed class OdbcTransaction : System.Data.Common.DbTransaction

type OdbcTransaction = class
    inherit MarshalByRefObject
    interface IDbTransaction
    interface IDisposable

type OdbcTransaction = class
    inherit DbTransaction

Public NotInheritable Class OdbcTransaction
Inherits MarshalByRefObject
Implements IDbTransaction, IDisposable

Public NotInheritable Class OdbcTransaction
Inherits DbTransaction

Herança

Object

MarshalByRefObject

OdbcTransaction

Herança

Object

MarshalByRefObject

DbTransaction

OdbcTransaction

Implementações

IDbTransaction IDisposable

Exemplos

O exemplo seguinte cria um OdbcConnection e um OdbcTransaction. Também demonstra como usar os BeginTransactionmétodos , Commit, e 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

Observações

A aplicação cria um OdbcTransaction objeto ao invocar BeginTransaction o OdbcConnection objeto. Todas as operações subsequentes associadas à transação (por exemplo, confirmar ou abortar a transação) são realizadas no OdbcTransaction objeto.

Ver também

• OdbcDataAdapter
• OdbcConnection
• Transações em Execução