求指错！！！求改错！（特别是红色的部分）

private void button3_Click(object sender, EventArgs e)
  {
   
  DialogResult dr = MessageBox.Show("是否要删除该商品信息？", "操作提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
  if (dr == DialogResult.Yes)
  {
  int id =(int) dataGridView1.SelectedRows[0].Cells[0].Value; try
  {
  string sql = string.Format("DELETE FROM 商品表 where 商品编号 = {0}", id); //删除员工权限表的数据
  SqlCommand command = new SqlCommand(sql, wa.connection);
  wa.connection.Open();
  int result = (int)command.ExecuteNonQuery();
  if (result == 1)
  {
  MessageBox.Show("商品信息删除成功！", "操作提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
  User.flag = true;
  }
  }
  catch (Exception ex)
  {
  MessageBox.Show("程序出错！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
  Console.WriteLine(ex.Message);
  }
  finally
  {
  wa.connection.Close();
  }
  }
   
  }

int id =(int) dataGridView1.SelectedRows[0].Cells[0].Value;
改成
int id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells[0].Value.ToString());

int.parse(dataGridView1.SelectedRows[0].Cells[0].Value.ToString())