protected void Delete_btn_Click(object sender, EventArgs e) { TeacherBLL teachetBll = new TeacherBLL(); Teacher teacher = new Teacher() { TId = la_TeaNo.Text.Trim() }; if (teachetBll.TeacherIsInvigilate(teacher.TId.ToString())) { infoAlert("该教师有监考记录, 无法删除"); } else { if (teachetBll.DeleteTeacher(teacher) > 0) { ClientScript.RegisterClientScriptBlock(this.GetType(), "succeed", "<script>window.alert('删除成功!');window.location='ManageTeacher.aspx';</script>"); } } }