public SybaseTransaction BeginTransaction(IsolationLevel iso, string transactionName)
{
if (State == ConnectionState.Closed)
{
throw new InvalidOperationException("The connection is not open.");
}
if (Transaction != null)
{
throw new InvalidOperationException("SybaseConnection does not support parallel transactions.");
}
string isolevel = String.Empty;
switch (iso)
{
case IsolationLevel.Chaos:
isolevel = "CHAOS";
break;
case IsolationLevel.ReadCommitted:
isolevel = "READ COMMITTED";
break;
case IsolationLevel.ReadUncommitted:
isolevel = "READ UNCOMMITTED";
break;
case IsolationLevel.RepeatableRead:
isolevel = "REPEATABLE READ";
break;
case IsolationLevel.Serializable:
isolevel = "SERIALIZABLE";
break;
}
tds.Execute(String.Format("SET TRANSACTION ISOLATION LEVEL {0}\nBEGIN TRANSACTION {1}", isolevel, transactionName));
transaction = new SybaseTransaction(this, iso);
return(transaction);
}
