protected void Page_Load(object sender, EventArgs e)
        {
            Student student;

            // Set the content type
            Response.ContentType = "text/plain";
            Response.ContentEncoding = Encoding.UTF8;

            // POSTed data
            student = new Student()
            {
                Id = int.Parse(Request.Form["id"]),
                Name = Request.Form["name"],
                Age = int.Parse(Request.Form["age"])
            };

            if (UpdateStudentInDB(student))
            {
                Response.Write(OutputValues(student));
            }
            else
            {
                // Return error string as "error : some error message"
                Response.Write(OutputError("failed to update student with primary key {0}", student.Id));
            }  
        }

        private bool UpdateStudentInDB(Student student)
        {
            SqlConnection connection;
            SqlCommand command;
            int recordsUpdated;
            bool result = false;

            connection = new SqlConnection(WebConfigurationManager.ConnectionStrings["DatabaseConnectionString"].ConnectionString);

            command = new SqlCommand("UPDATE Student Name=@Name, Age=@Age WHERE Id=@Id", connection);
            command.Parameters.AddWithValue("@Id", student.Id);
            command.Parameters.AddWithValue("@Name", student.Name);
            command.Parameters.AddWithValue("@Age", student.Age);

            using (connection)
            {
                connection.Open();

                recordsUpdated = command.ExecuteNonQuery();
                if (recordsUpdated > 0)
                {
                    result = true;
                }
            }

            return result;
        }