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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for March 17th, 2016

The Default magic function in Delphi

Posted by jpluimers on 2016/03/17

Stefan Glienke worded it perfectly: Default(typeIdentifier) is a “magic” function that is implemented into the compiler and causes it to generate the correct code – like for records with managed fields it generates a call to FinalizeRecord and some instructions to zero the remaining fields.

Source: I know I can write MyRecordVar := Default(TMyRecordType) because I asked a qu…


Posted in Delphi, Delphi 10 Seattle, Delphi XE, Delphi XE2, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development | Leave a Comment »

Reminder to self: app.config and “ORA-12154: TNS:could not resolve the connect identifier specified”

Posted by jpluimers on 2016/03/17

When you have one app.config for your whole set of DTAP environments (develop/test/acceptance production), every once in a while you get this error:

ORA-12154: TNS:could not resolve the connect identifier specified

For this particular setup, it means the replacement of┬áparameters in the app.config with actual values from the DTAP went wrong (or was missing). For that we’ve┬ásome steps in both the PreBuildEvent and PostBuildEvent of the .csproj file:


del "$(ProjectDir)$(TargetFileName).config"
copy "$(ProjectDir)app.config" "$(ProjectDir)$(TargetFileName).config"


powershell -noprofile -file Replace-Parameter.ps1 -Path "$(TargetDir)$(TargetFileName).config"

The PreBuildEvent looks like it is not needed, but sometimes Visual Studio forgets to perform the copy action.


Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, .NET ORM, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, C# 6 (Roslyn), Database Development, Development, NHibernate, OracleDB, Software Development | Leave a Comment »

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