//删除学生 private void btnDelete_Click(object sender, EventArgs e) { if (dataGridView1.SelectedRows.Count > 0) { string sid = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); StudentBLL bll = new StudentBLL(); string msg = bll.DeleteStudentInfo(sid)?"删除成功":"删除失败"; MessageBox.Show(msg); LoadStudentInfo(); } else { MessageBox.Show("请选择要删除的行"); } }