Application Exception happens instead of FbException when Firebird service is
stopped.
--------------------------------------------------------------------------------------
Key: DNET-324
URL: http://tracker.firebirdsql.org/browse/DNET-324
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 2.5.2
Environment: Windows 7 Ultimate;
Microsoft Visual C# 2010 Express;
Firebird 2.5.0.25920 Release candidate 2;
Reporter: Luciano Mendes
Assignee: Jiri Cincura
ACTUAL RESULT: Application Exception happens instead of FbException when
Firebird service is stopped.
EXPECTED RESULT: An FbException should happen instead of Application Exception.
STEPS TO REPRODUCE THIS ISSUE:
1- Start Firebird service and connect with a database [fbConnection].
2- Execute a valid data reader [fbCommand.ExecuteReader()] or Non Query
[fbCommand.ExecuteNonQuery()]:
Verify that no error happens;
3- Stop Firebird Service and repeat the same procedure from step 2
ISSUE: An application exception happens instead of an FbException:
***************************************************************************************************************
System.NullReferenceException: Object reference not set to an instance of an
object.
at
FirebirdSql.Data.Client.Managed.Version10.GdsTransaction.BeginTransaction(TransactionParameterBuffer
tpb)
at
FirebirdSql.Data.Client.Managed.Version10.GdsDatabase.BeginTransaction(TransactionParameterBuffer
tpb)
at FirebirdSql.Data.FirebirdClient.FbTransaction.BeginTransaction()
at FirebirdSql.Data.FirebirdClient.FbCommand.Prepare(Boolean returnsSet)
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteCommand(CommandBehavior
behavior, Boolean returnsSet)
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteCommand(CommandBehavior
behavior)
at FirebirdSql.Data.FirebirdClient.FbCommand.ExecuteNonQuery()
***************************************************************************************************************
Example:
================================================================
try
{
FbCommand fbCommand = new FbCommand(cmdText, fbConnection);
fbCommand.CommandType = CommandType.Text;
FbDataReader fbDataReader = fbCommand.ExecuteReader();
return fbDataReader;
}
catch (FbException ex)
{
/*THIS EXCEPTION SHOULD GET HERE*/
if (ex.Errors[ex.Errors.Count - 1].Number == 335544726)
MessageBox.Show("Connection to Server Lost.", "ERROR");
}
================================================================
ENVIRONMENT
- ADO.NET Data Provider Version: 05-Jun-2010 19:07 -
http://netprovider.cincura.net/FirebirdSql.Data.FirebirdClient.dll;
- Windows 7 Ultimate;
- Microsoft Visual C# 2010 Express;
- Firebird 2.5.0.25920 Release candidate 2;
================================================================
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