if (ADMINS != null)
        {
            while (ADMINS.Read())
            {
                this.dgvUsers.Rows.Add(ADMINS["id"], ADMINS["user"], ADMINS["privileges"]);
            }
        }

if (ADMINS.HasRows)
                {
                    while (ADMINS.Read())
                    {
                        if (ADMINS["user"].ToString() == "root")
                        {
                            MessageBox.Show("YES");
                        }
                    }
                }