//删除学生签到记录 private void toolStripButton8_Click(object sender, EventArgs e) { int id; try { id = Convert.ToInt32(dataGridView3.CurrentRow.Cells[0].Value); } catch (Exception ex) { MessageBox.Show(ex.Message); return; } if (MessageBox.Show("确定要删除吗?", "询问", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != DialogResult.Yes) { return; } if (SignManager.DeleteSignUpRecord(id)) { MessageBox.Show("删除成功!"); } else { MessageBox.Show("删除失败!"); } RefreshClassTable(); }