protected void btnAdd_Click(object sender, EventArgs e) { //Student s = new Student(); //s.EnrolStudent((int)(gvCourse.SelectedValue), int.Parse(ddlNewStudents.SelectedValue), DateTime.Today.Year.ToString()); //lblMessage.Text = "Student added"; //gvClass.DataBind(); //displayStudent(); Course objCourse = new Course(); //get information for enrolling student int studentID = int.Parse(ddlNewStudents.SelectedValue); int courseID = (int)gvCourse.SelectedValue; string year = DateTime.Now.Year.ToString(); int numRowsAffected = objCourse.EnrolStudent(studentID, courseID, year); //display confirmation message if (numRowsAffected > 0) { lblMessage.Text = "New student added"; lblMessage.CssClass = "confirmation"; } else { lblMessage.Text = "Faild to add new student"; lblMessage.CssClass = "error"; } }