Connection to Oracle works through a console application and doesn't work through a web application - ORA-12154

Question

My question is very similar to this . But I'm pretty sure that there is no parentheses in web-application directory because it looks like "D:\\Work\\MyProject\\portal\\Web"

In my ISession object getting error in Connection property saying:

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

It is happening when debugging web-application from localhost in Visual Studio 2010.

But when executing the same code in console application it works perfectly. Connection string is in form of "Data Source=SERVER/oracle;User Id=USER;Password=PASS;"

My development environment summary:

win7 x64 sp1, oracle.dataaccess.dll version 10.2.0.100, ms visual studio 2010

UPDATED

I have changeddeal with Connection property in web application and can in console... But now I have another error:

Unable to load DLL 'OraOps10.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

I have completely reinstalled oracle client 10g. I even tried to set all of my projects to x86 (earlier were Any CPU). I have checked .Net Framework version and it is 3.5

Answer 1

1. Check your ORACLE_HOME (path)
2. Check privilegies on the oracle home directory.
3. Check your references in your web app(should be to Oracle.DataAccess and also System.Data).