查询多个DSN（域名源）

Question

I'm new to ODBC and DSN's in general.

We have a product A that accesses a database "T" via a DSN D1 that has already been defined.

I'm now writing a test app testA that exercises various functionalities of product A and also needs to validate various database entries made by A.

For this, I am trying to access the same DSN D1 (that was setup for database T) to read from db and do the necessary validations.

I'm however having issues with that. I've setup the dsn, but when I do a SQLConnect with this dsn, I get a return value of -1.(I dont see any corresponding values for this return type either)n

Any clues on what this means and if I'm doing something wrong.Can we have 2 different processes or apps connect to the same DSN?

Answer 1

You can test access using a "udl" file. These files are largly misunderstood IMHO. They are simply a script that is used to launch the (db) connection library. You can create them by creating an empty file in notepad and changing the extension to .udl from .txt. You then double click on the file and configuer access to your database. (they launch a build in configeration applet). In my experience if a .udl file connects then any application will connect or 100% there is a problem with the application. If the udl file will not connect, then 100% there is a firewall or something probibiting access to the account being used to try to connect.