AerolineaFrba.FormLogin.cargarComboRoles C# (CSharp) Метод

        private void cargarComboRoles()
        {
            cboRoles.Items.Clear();

            SqlDataReader reader;
            SqlCommand consultaRoles = new SqlCommand();
            consultaRoles.CommandType = CommandType.Text;
            consultaRoles.CommandText = "SELECT R.ROL_NOMBRE FROM [ABSTRACCIONX4].ROLES_USUARIOS RU JOIN [ABSTRACCIONX4].ROLES R ON (RU.ROL_COD = R.ROL_COD) JOIN [ABSTRACCIONX4].USUARIOS U ON (U.USUA_COD = RU.USUA_COD) WHERE U.USERNAME = 'INVITADO' AND R.ROL_ESTADO = 1";
            consultaRoles.Connection = Program.conexion();

            reader = consultaRoles.ExecuteReader();

            while (reader.Read())
                cboRoles.Items.Add(reader.GetValue(0));

            reader.Close();
        }