Question

I am using ODBC to connect to a Sybase databse. The problem is the connection doesn’t close even after it’s is scope complete, and I see around 200 connection open in the database when I run sp_who. I tried enabling the connection pool, but that doesn’t help either.

    using(var connection = GetOdbcConnection())
    {
        connection.Open();
        using (var cmd = new OdbcCommand(query, connection))
        {
            var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                long textLen = reader.GetChars(0, 0, null, 0, 0);
            }
            reader.Close();
        }
    }

The connection string which I use is value="Driver={Adaptive Server Enterprise};app=xxx;server=xxxx;port=xxxx; db=xxx;uid=xxx;pwd=xxxx;textsize=2097152".

Update:

public static OdbcConnection GetOdbcConnection() {
    string connectionString = ConfigurationManager.AppSettings["ConnectionString"].ToString();
    return new OdbcConnection(connectionString);
}

Answer 1

Have you tried connection.Close()?

 using(var connection = GetOdbcConnection())
    {
        connection.Open();
        using (var cmd = new OdbcCommand(query, connection))
        {
            var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                long textLen = reader.GetChars(0, 0, null, 0, 0);

            }
            reader.Close();
        }            
        // Close the connection
        connection.Close();
    }