string delete_No = this.dataGridView1.SelectedRows[0].Cells["编号"].Value.ToString();
                        string strConnect = Properties.Settings.Default.PopInfoConnectionString;
                        SqlConnection conConnection = new SqlConnection(strConnect);
                        conConnection.Open();
                        string cmd = "delete from [aaa] where id=" + delete_No + "";
                        SqlCommand com = new SqlCommand(cmd, conConnection);
                         {
                            com.ExecuteNonQuery();
                            this.dataGridView1.Rows.RemoveAt(this.dataGridView1.SelectedRows[0].Index);
                            MessageBox.Show("记录已成功删除", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                         }