SqlDataReader reader = sqlCommand.ExecuteReader(CommandBehavior.CloseConnection)

= "select users.uNO,upwd  from users  where  uNO.='" + this.textBox1.Text.Trim() + "'and upwd='" + this.textBox2.Text.Trim() + "'";
                SqlDataReader reader = sqlCommand.ExecuteReader(CommandBehavior.CloseConnection);
                if (reader.Read())
                {
                    this.Hide();
                    users  user = new users ();
                    user.Show();
                }
运行是不会报错，输入用户名和密码后就会出现异常。

“'=' 附近有语法错误。”
各位大神。帮帮忙啊。