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OracleConnection.BeginTransaction Method (IsolationLevel)

Begins a transaction at the database with the specified IsolationLevel value.

Namespace: System.Data.OracleClient
Assembly: System.Data.OracleClient (in

public OracleTransaction BeginTransaction (
	IsolationLevel il
public OracleTransaction BeginTransaction (
	IsolationLevel il
public function BeginTransaction (
	il : IsolationLevel
) : OracleTransaction



The transaction isolation level for this connection.

Return Value

An object representing the new transaction.

Exception typeCondition


Parallel transactions are not supported.

To commit or roll back the transaction, you must explicitly use the Commit or Rollback methods.

To ensure that the .NET Framework Data Provider for Oracle transaction management model performs correctly, avoid using other transaction management models, such as those provided by the database.

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))

        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;

            command.CommandText = 
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')";
            command.CommandText = 
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')";
            Console.WriteLine("Both records are written to database.");
        catch (Exception e)
            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