OracleTransaction.Rollback Method
Definition
Important
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Rolls back a transaction from a pending state.
public:
virtual void Rollback();
public:
override void Rollback();
public void Rollback ();
public override void Rollback ();
abstract member Rollback : unit -> unit
override this.Rollback : unit -> unit
override this.Rollback : unit -> unit
Public Sub Rollback ()
Public Overrides Sub Rollback ()
Implements
Exceptions
An error occurred while trying to commit the transaction.
The transaction has already been committed or rolled back.
-or-
The connection is broken.
Examples
The following example creates an OracleConnection and an OracleTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods.
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.");
}
}
}
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
Remarks
The transaction can be rolled back only from a pending state (after BeginTransaction has been called, but before Commit is called).
Applies to
See also
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