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OracleTransaction.Rollback Method

Rolls back a transaction from a pending state.

Namespace: System.Data.OracleClient
Assembly: System.Data.OracleClient (in system.data.oracleclient.dll)

'Declaration
Public Overrides Sub Rollback
'Usage
Dim instance As OracleTransaction

instance.Rollback
public void Rollback ()
public override function Rollback ()

Exception typeCondition

Exception

An error occurred while trying to commit the transaction.

InvalidOperationException

The transaction has already been committed or rolled back.

-or-

The connection is broken.

The transaction can be rolled back only from a pending state (after BeginTransaction has been called, but before Commit is called).

The following example creates an OracleConnection and an OracleTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods.

Public Sub RunOracleTransaction(ByVal connectionString As String)
    Using connection As New OracleConnection(connectionString)
        connection.Open()

        Dim command As OracleCommand = connection.CreateCommand()
        Dim transaction As OracleTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted)
        ' Assign transaction object for a pending local transaction
        command.Transaction = transaction

        Try
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')"
            command.ExecuteNonQuery()
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")
        Catch e As Exception
            transaction.Rollback()
            Console.WriteLine(e.ToString())
            Console.WriteLine("Neither record was written to database.")
        End Try
    End Using
End Sub

using System;
using System.Data;
using System.Data.OracleClient;

class Class1
{
    static void Main()
    {
    

    public void RunOracleTransaction(string connectionString)
    {
        using (OracleConnection connection = new OracleConnection(connectionString))
        {
            connection.Open();

            OracleCommand command = connection.CreateCommand();
            OracleTransaction transaction;

            // Start a local transaction
            transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
            // Assign transaction object for a pending local transaction
            command.Transaction = transaction;

            try
            {
                command.CommandText = 
                    "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')";
                command.ExecuteNonQuery();
                command.CommandText = 
                    "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')";
                command.ExecuteNonQuery();
                transaction.Commit();
                Console.WriteLine("Both records are written to database.");
            
            catch (Exception e)
            {
                transaction.Rollback();
                Console.WriteLine(e.ToString());
                Console.WriteLine("Neither record was written to database.");
            
        
    

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1

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