IDbTransaction Interfaz

Definición

public interface class IDbTransaction : IDisposable

public interface IDbTransaction : IDisposable

type IDbTransaction = interface
    interface IDisposable

Public Interface IDbTransaction
Implements IDisposable

Derivado

System.Data.Common.DbTransaction

System.Data.Odbc.OdbcTransaction

System.Data.OleDb.OleDbTransaction

System.Data.OracleClient.OracleTransaction

System.Data.SqlClient.SqlTransaction

Implementaciones

IDisposable

Ejemplos

En el ejemplo siguiente se crean instancias de las clases derivadas y SqlConnectionSqlTransaction. También muestra cómo usar los BeginTransactionmétodos , Commity Rollback .

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

Comentarios

La IDbTransaction interfaz permite que una clase heredada implemente una clase Transaction, que representa la transacción que se va a realizar en un origen de datos. Para obtener más información sobre las clases Transaction, vea Transactions and Concurrency.

Una aplicación no crea una instancia de la IDbTransaction interfaz directamente, sino que crea una instancia de una clase que hereda IDbTransaction.

Las clases que heredan IDbTransaction deben implementar los miembros heredados y normalmente definir miembros adicionales para agregar funcionalidad específica del proveedor. Por ejemplo, la IDbTransaction interfaz define el Commit método . A su vez, la OleDbTransaction clase hereda esta propiedad y también define el Begin método .

Notas a los implementadores

Para promover la coherencia entre los proveedores de datos de .NET Framework, asigne un nombre a la clase heredada en el formulario Prv Transaction , donde Prv es el prefijo uniforme proporcionado a todas las clases de un espacio de nombres específico del proveedor de datos de .NET Framework. Por ejemplo, Sql es el prefijo de la SqlTransaction clase en el System.Data.SqlClient espacio de nombres .

Propiedades

Métodos

Se aplica a