public void popularTabela(String adapter, String nomeTabela)
        {
            MySqlConnection cn = new MySqlConnection("server=localhost;uid=root;pwd=faat;database=vendas");
            cn.Open();

            try
            {
                DataSet mDataSet = new DataSet();

                MySqlDataAdapter mAdapter = new MySqlDataAdapter(adapter, cn);
                mAdapter.Fill(mDataSet, nomeTabela);

                dataGridViewClientes.DataSource = mDataSet;
                dataGridViewClientes.DataMember = nomeTabela;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Erro!!");
            }
            finally
            {
                cn.Close();
            }
        }