private static IsolationLevel MapOdbcIsolationLevel(OdbcIsolationLevel odbcLevel)
{
IsolationLevel isoLevel = IsolationLevel.Unspecified;
switch (odbcLevel)
{
case OdbcIsolationLevel.ReadUncommitted:
isoLevel = IsolationLevel.ReadUncommitted;
break;
case OdbcIsolationLevel.ReadCommitted:
isoLevel = IsolationLevel.ReadCommitted;
break;
case OdbcIsolationLevel.RepeatableRead:
isoLevel = IsolationLevel.RepeatableRead;
break;
case OdbcIsolationLevel.Serializable:
isoLevel = IsolationLevel.Serializable;
break;
case OdbcIsolationLevel.Snapshot:
isoLevel = IsolationLevel.Snapshot;
break;
}
return(isoLevel);
}
private static IsolationLevel MapOdbcIsolationLevel(OdbcIsolationLevel odbcLevel)
{
IsolationLevel isoLevel = IsolationLevel.Unspecified;
switch (odbcLevel)
{
case OdbcIsolationLevel.ReadUncommitted:
isoLevel = IsolationLevel.ReadUncommitted;
break;
case OdbcIsolationLevel.ReadCommitted:
isoLevel = IsolationLevel.ReadCommitted;
break;
case OdbcIsolationLevel.RepeatableRead:
isoLevel = IsolationLevel.RepeatableRead;
break;
case OdbcIsolationLevel.Serializable:
isoLevel = IsolationLevel.Serializable;
break;
#if NET_2_0
case OdbcIsolationLevel.Snapshot:
isoLevel = IsolationLevel.Snapshot;
break;
#else
default:
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
"Isolation level {0} is not supported.",
odbcLevel));
#endif
}
return(isoLevel);
}
private static IsolationLevel MapOdbcIsolationLevel (OdbcIsolationLevel odbcLevel)
{
IsolationLevel isoLevel = IsolationLevel.Unspecified;
switch (odbcLevel) {
case OdbcIsolationLevel.ReadUncommitted:
isoLevel = IsolationLevel.ReadUncommitted;
break;
case OdbcIsolationLevel.ReadCommitted:
isoLevel = IsolationLevel.ReadCommitted;
break;
case OdbcIsolationLevel.RepeatableRead:
isoLevel = IsolationLevel.RepeatableRead;
break;
case OdbcIsolationLevel.Serializable:
isoLevel = IsolationLevel.Serializable;
break;
case OdbcIsolationLevel.Snapshot:
isoLevel = IsolationLevel.Snapshot;
break;
}
return isoLevel;
}
internal OdbcTransaction(OdbcConnection conn, IsolationLevel isolationlevel)
{
// Set Auto-commit (102) to false
SetAutoCommit(conn, false);
// Handle isolation level
OdbcIsolationLevel lev = OdbcIsolationLevel.ReadCommitted;
OdbcConnectionAttribute attr = OdbcConnectionAttribute.TransactionIsolation;
switch (isolationlevel)
{
case IsolationLevel.ReadUncommitted:
lev = OdbcIsolationLevel.ReadUncommitted;
break;
case IsolationLevel.ReadCommitted:
lev = OdbcIsolationLevel.ReadCommitted;
break;
case IsolationLevel.RepeatableRead:
lev = OdbcIsolationLevel.RepeatableRead;
break;
case IsolationLevel.Serializable:
lev = OdbcIsolationLevel.Serializable;
break;
case IsolationLevel.Snapshot:
// badly broken on MS:
// https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=305736
lev = OdbcIsolationLevel.Snapshot;
// SQL_ATTR_TXN_ISOLATION can be used to set all other isolation
// levels except for SQL_TXN_SS_SNAPSHOT. If you want to use snapshot
// isolation, you must set SQL_TXN_SS_SNAPSHOT through
// SQL_COPT_SS_TXN_ISOLATION. However, you can retrieve the
// isolation level by using either SQL_ATTR_TXN_ISOLATION or
// SQL_COPT_SS_TXN_ISOLATION.
// Source:
// http://msdn2.microsoft.com/en-us/library/ms131709.aspx
attr = OdbcConnectionAttribute.CoptTransactionIsolation;
break;
case IsolationLevel.Unspecified:
// when isolationlevel is not specified, then use
// default isolation level of the driver and
// lazy initialize it in the IsolationLevel property
break;
case IsolationLevel.Chaos:
throw new ArgumentOutOfRangeException("IsolationLevel",
string.Format(CultureInfo.CurrentCulture,
"The IsolationLevel enumeration " +
"value, {0}, is not supported by " +
"the .Net Framework Odbc Data " +
"Provider.", (int)isolationlevel));
default:
throw new ArgumentOutOfRangeException("IsolationLevel",
string.Format(CultureInfo.CurrentCulture,
"The IsolationLevel enumeration value, {0}, is invalid.",
(int)isolationlevel));
}
// only change isolation level if it was explictly set
if (isolationlevel != IsolationLevel.Unspecified)
{
// mbd: Getting the return code of the second call to SQLSetConnectAttr is missing from original code!
OdbcReturn ret = libodbc.SQLSetConnectAttr(conn.hDbc,
attr, (IntPtr)lev, 0);
if (ret != OdbcReturn.Success && ret != OdbcReturn.SuccessWithInfo)
{
throw conn.CreateOdbcException(OdbcHandleType.Dbc, conn.hDbc);
}
}
this.isolationlevel = isolationlevel;
connection = conn;
isOpen = true;
}
private static IsolationLevel MapOdbcIsolationLevel (OdbcIsolationLevel odbcLevel)
{
IsolationLevel isoLevel = IsolationLevel.Unspecified;
switch (odbcLevel) {
case OdbcIsolationLevel.ReadUncommitted:
isoLevel = IsolationLevel.ReadUncommitted;
break;
case OdbcIsolationLevel.ReadCommitted:
isoLevel = IsolationLevel.ReadCommitted;
break;
case OdbcIsolationLevel.RepeatableRead:
isoLevel = IsolationLevel.RepeatableRead;
break;
case OdbcIsolationLevel.Serializable:
isoLevel = IsolationLevel.Serializable;
break;
#if NET_2_0
case OdbcIsolationLevel.Snapshot:
isoLevel = IsolationLevel.Snapshot;
break;
#else
default:
throw new NotSupportedException (string.Format (
CultureInfo.InvariantCulture,
"Isolation level {0} is not supported.",
odbcLevel));
#endif
}
return isoLevel;
}
