.NET Framework Class Library IDbTransaction Interface Represents a transaction to be performed at a data source, and is implemented by .NET Framework data providers that access relational databases. (in System.Data.dll)
Syntax
Public Interface IDbTransaction _
Inherits IDisposable
public interface IDbTransaction : IDisposable
public interface class IDbTransaction : IDisposable
type IDbTransaction =
interface
interface IDisposable
end
The IDbTransaction type exposes the following members.
Properties
Remarks
The IDbTransaction interface allows an inheriting class to implement a Transaction class, which represents the transaction to be performed at a data source. For more information about Transaction classes, see Transactions and Concurrency (ADO.NET). An application does not create an instance of the IDbTransaction interface directly, but creates an instance of a class that inherits IDbTransaction. Classes that inherit IDbTransaction must implement the inherited members, and typically define additional members to add provider-specific functionality. For example, the IDbTransaction interface defines the Commit method. In turn, the OleDbTransaction class inherits this property, and also defines the Begin method. Notes to ImplementersTo promote consistency among .NET Framework data providers, name the inheriting class in the form Prv Transaction where Prv is the uniform prefix given to all classes in a specific .NET Framework data provider namespace. For example, Sql is the prefix of the SqlTransaction class in the System.Data.SqlClient namespace.
Examples
The following example creates instances of the derived classes, SqlConnection and SqlTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods.
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
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);
}
}
}
}
Version Information
.NET FrameworkSupported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0 .NET Framework Client ProfileSupported in: 4, 3.5 SP1
Platforms
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role not supported), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
See Also
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Biblioteca de clases de .NET Framework IDbTransaction (Interfaz) Representa una transacción que se debe realizar en un origen de datos y la implementan los proveedores de datos de .NET Framework que tienen acceso a bases de datos relacionales. (en System.Data.dll)
Sintaxis
Public Interface IDbTransaction _
Inherits IDisposable
public interface IDbTransaction : IDisposable
public interface class IDbTransaction : IDisposable
type IDbTransaction =
interface
interface IDisposable
end
El tipo IDbTransaction expone los siguientes miembros.
Propiedades
Comentarios
La interfaz IDbTransaction permite que una clase heredada implemente una clase Transaction, que representa la transacción que se debe realizar en el origen de datos. Para obtener más información sobre las clases Transaction, vea Transacciones y simultaneidad (ADO.NET). Una aplicación no crea una instancia de la interfaz IDbTransaction directamente, sino que la crea de una clase que hereda de IDbTransaction. Las clases que heredan de IDbTransaction deben implementar los miembros heredados y suelen definir miembros adicionales para agregar la funcionalidad específica de proveedor. Por ejemplo, la interfaz IDbTransaction define el método Commit. A su vez, la clase OleDbTransaction hereda esta propiedad y también define el método Begin. Notas para los implementadoresPara potenciar la coherencia entre los proveedores de datos de .NET Framework, asigne a la clase heredada un nombre con el formato Prv Transaction, donde Prv es el prefijo uniforme que se asigna a todas las clases de un espacio de nombres de proveedor de datos de .NET Framework específico. Por ejemplo, Sql es el prefijo de la clase SqlTransaction en el espacio de nombres System.Data.SqlClient.
Ejemplos
En el ejemplo siguiente se crean instancias de las clases derivadas SqlConnection y SqlTransaction. También se muestra la forma de utilizar los métodos BeginTransaction, Commit y Rollback.
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
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);
}
}
}
}
Información de versión
.NET FrameworkCompatible con: 4, 3.5, 3.0, 2.0, 1.1, 1.0 .NET Framework Client ProfileCompatible con: 4, 3.5 SP1
Plataformas
Windows 7, Windows Vista SP1 o posterior, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (no se admite Server Core), Windows Server 2008 R2 (se admite Server Core con SP1 o posterior), Windows Server 2003 SP2
.NET Framework no admite todas las versiones de todas las plataformas. Para obtener una lista de las versiones compatibles, vea Requisitos de sistema de .NET Framework.
Vea también
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