如何将c＃与Oracle数据库连接以指定数据库名称？

Question

I have a problem trying to connect to oracle database specifing the database name, when the database name is different than the user name.

I used to connect using the next String. But in this case the Schema of the database was the same as the user name.

     String con = "data source= (DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = " + host + ")(PORT = " + port + ")))(CONNECT_DATA =(SERVICE_NAME = " + servicename + ")));
USER ID=" + user + ";
PASSWORD=" + pass;

So the query for login was like

SELECT * FROM usuarios WHERE usuario='545478';

Now i have a new user for the conexion, diferent that the Schema, so now i need to change all the sql queries using the Schema name. For example if the schema name is PRODUCTION_DB the query needs to be change to:

SELECT * FROM PRODUCTION_DB.usuarios WHERE usuario='545478';

But i dont want to change all the queries in my code. I prefer to specified the database name in the conection like in MySQL.

How can i change de String connection to add the database name?

For example:

String con = "data source= (DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = " + host + ")(PORT = " + port + ")))(CONNECT_DATA =(SERVICE_NAME = " + servicename + ")));
USER ID=" + user + ";PASSWORD=" + pass;
 DATABASE = "PRODUCTION_DB";

Answer 1

Try this connection string:

 string connectionString = "user id=uat;password=*****;data source=localhost:1521/orcl";
 OracleConnection connection = new OracleConnection(connectionString);
 connection.Open();

where:

• orcl - is my database name (SID)
• uat - is a schema name (user name)
• localhost:1521 - are a server name (in my case: localhost) and a port.