private void UpdateStudentList() { Course objCourse = new Course(); int selectedCourseID = (int)gvCourse.SelectedValue; ddlNewStudents.DataSource = objCourse.GetStudentNotInCourse(selectedCourseID); ddlNewStudents.DataTextField = "studentname"; ddlNewStudents.DataValueField = "studentID"; ddlNewStudents.DataBind(); }