Question

I get this error:

ERROR [28000] [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user ‘(null)’. Reason: Not associated with a trusted SQL
Server connection.

Here’s my code (C#), I’m running this on a local and on a remote machine:

    using (OdbcConnection connection = new OdbcConnection("dsn=mydsn"))
    {
        connection.ConnectionTimeout = 50000;

        OdbcCommand command = new OdbcCommand("select * from users", connection);
        command.CommandTimeout = 50000;

        connection.Open();
        OdbcDataReader reader = command.ExecuteReader();
    }

DSN details:

name: mydsn
SQL login: mylogin
database: Test

SQL Server Configuration:

security: sql server and windows authentication mode

Whenever I try to use use the login to Management Studio, everything works fine, I can execute queries.

Answer 1

ODBC ALWAYS uses a trusted connection so the user account (on Windows) must have required privileges to access the database.