/// <summary>
        /// When the page loads, all courses from the database are retrieved and displayed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void Page_Load(object sender, EventArgs e)
        {
            connectionString = ConfigurationManager.ConnectionStrings["flexiLearn"].ConnectionString;
            CourseDAO dao = new CourseDAO(connectionString);

            courses = dao.ReadAll();

            if (!IsPostBack)
            {
                GVCourses.DataSource = courses;
                GVCourses.DataBind();
            }
        }