OdbcTransaction Класс

Определение

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

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

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

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

type OdbcTransaction = class
    inherit DbTransaction

type OdbcTransaction = class
    inherit MarshalByRefObject
    interface IDbTransaction
    interface IDisposable

Public NotInheritable Class OdbcTransaction
Inherits DbTransaction

Public NotInheritable Class OdbcTransaction
Inherits MarshalByRefObject
Implements IDbTransaction, IDisposable

Наследование

Object

DbTransaction

OdbcTransaction

Наследование

Object

MarshalByRefObject

DbTransaction

OdbcTransaction

Наследование

Object

MarshalByRefObject

OdbcTransaction

Реализации

IDbTransaction IDisposable

Примеры

В следующем примере создается OdbcConnection и объект OdbcTransaction. В нем также показано, как использовать BeginTransactionCommitметоды и Rollback методы.

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

Комментарии

Приложение создает OdbcTransaction объект, вызывая BeginTransactionOdbcConnection объект. Все последующие операции, связанные с транзакцией (например, фиксация или прерывание транзакции), выполняются в объекте OdbcTransaction .

См. также раздел

• OdbcDataAdapter
• OdbcConnection
• Выполнение транзакций