OracleConnection.Open is throwing ORA-12541 TNS no listener

Question

So I am connecting to an external server through C#. I just installed Oracle 11g client on my machine from here: http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html (255MB one).

After reading many blogs/questions I found this article to be useful:

http://dbaspot.com/oracle-faq/444787-ora-12541-tns-no-listener.html

So is this correct? I cannot do anything. The DBA has to edit the LISTENER.ORA file?

My tnsnames.ora looks like this:

  TestingConnect=
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = TestHostName.us.local)(PORT = 1523))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = TEST)
    )
  )

It is throwing me the err at:

Oracle.DataAccess.Client.OracleConnection connection = new Oracle.DataAccess.Client.OracleConnection();

connection.ConnectionString = "Data Source=TestHostName.us.local;Persist Security Info=True;" + "User ID=tesName;Password=test";

connection.Open() //Throwing ERR!!!

What should I do? I appreciate any comments. Thanks!

Answer 1

Thanks for all your input. I changed my connection string and it worked. Here its what looks like:

 private static string GetConnectionString()
    {
        return "Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=TestHostName.us.local)(PORT=1523) ) )" +
               "(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=CCDB)));User id=UserName; Password=Password; enlist=false; pooling=false;";
    }