protected void btnDeleteHomework_Click(object sender, EventArgs e) { Homework homework = new Homework(); Question question = new Question(); IssuedHomework issuedHomework = new IssuedHomework(); QuestionToAnswer questionToAnswer = new QuestionToAnswer(); ArrayList issHwIds = new ArrayList(); issHwIds = issuedHomework.selectAllIssuedHomeworkFromCore(hwID); for (int i = 0; i < issHwIds.Count; i++) { questionToAnswer.deleteIssuedQuestions(issHwIds[i].ToString()); } issuedHomework.deleteIssuedHomework(hwID); question.deleteQuestions(hwID); homework.deleteCoreHomework(hwID); Session["SelectedHomework"] = null; Response.Redirect("Teacher_View_All_Homework.aspx"); }