private void deleteCousInfos(object sender, EventArgs e) { ContextMenuStrip context = (ContextMenuStrip)sender; int info = teacherBll.deleteCourse(context.Text, tea_id); if (info > 0) { MessageBox.Show("删除成功", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information); showCourse(); } else { MessageBox.Show("删除失败", "提示错误", MessageBoxButtons.OK, MessageBoxIcon.Error); } }