// Enrolls the student into the given course.
protected void EnrollStudentImageButton_Click(object sender, ImageClickEventArgs e)
{
ImageButton enrollStudentImageButton = sender as ImageButton;
Student student = courseController.FindStudentById(int.Parse(enrollStudentImageButton.CommandArgument));
courseController.InsertEnrollment(new Enrollment(0, ViewState["SelectedCourse"] as Course, student, 0));
Response.Redirect(string.Format("CourseManagement?course={0}&enrolledFirstName={1}&enrolledLastName={2}", Request.QueryString["course"], student.FirstMidName, student.LastName));
}