/// <summary>
/// Starts a database transaction.
/// </summary>
/// <param name="isolationLevel">Specifies the isolation level for the transaction.</param>
/// <returns>
/// An object representing the new transaction.
/// </returns>
protected override DbTransaction BeginDbTransaction(IsolationLevel isolationLevel)
{
if (State != ConnectionState.Open)
{
throw new InvalidOperationException(Messages.CannotCallMethodInThisConnectionState("BeginDbTransaction", State));
}
if (ActiveTransaction != null)
{
throw new InvalidOperationException(Messages.UnsupportedParallelTransactions());
}
switch (isolationLevel)
{
case IsolationLevel.Serializable:
ActiveTransaction = new JetTransaction(InnerConnection.BeginTransaction(IsolationLevel.ReadCommitted), this);
break;
default:
ActiveTransaction = new JetTransaction(InnerConnection.BeginTransaction(isolationLevel), this);
break;
}
return(ActiveTransaction);
}
private void Initialize(string commandText, JetConnection connection, DbTransaction transaction)
{
_Connection = null;
_Transaction = null;
_DesignTimeVisible = true;
_WrappedCommand = new OleDbCommand();
this.CommandText = commandText;
this.Connection = connection;
this.Transaction = transaction;
}