private bool _active; // Is the transaction active?
internal SqlDelegatedTransaction(SqlInternalConnection connection, Transaction tx)
{
Debug.Assert(null != connection, "null connection?");
_connection = connection;
_atomicTransaction = tx;
_active = false;
Transactions.IsolationLevel systxIsolationLevel = (Transactions.IsolationLevel)tx.IsolationLevel;
// We need to map the System.Transactions IsolationLevel to the one
// that System.Data uses and communicates to SqlServer. We could
// arguably do that in Initialize when the transaction is delegated,
// however it is better to do this before we actually begin the process
// of delegation, in case System.Transactions adds another isolation
// level we don't know about -- we can throw the exception at a better
// place.
_isolationLevel = systxIsolationLevel switch
{
Transactions.IsolationLevel.ReadCommitted => IsolationLevel.ReadCommitted,
Transactions.IsolationLevel.ReadUncommitted => IsolationLevel.ReadUncommitted,
Transactions.IsolationLevel.RepeatableRead => IsolationLevel.RepeatableRead,
Transactions.IsolationLevel.Serializable => IsolationLevel.Serializable,
Transactions.IsolationLevel.Snapshot => IsolationLevel.Snapshot,
_ => throw SQL.UnknownSysTxIsolationLevel(systxIsolationLevel),
};
}
internal static Exception UnknownSysTxIsolationLevel(Transactions.IsolationLevel isolationLevel)
{
return(ADP.InvalidOperation(SR.GetString(SR.SQL_UnknownSysTxIsolationLevel, isolationLevel.ToString())));
}
