private void Edit(OperationType operationType)
        {
            int myCompany =  0 ;
            CurrencyManager crm = (CurrencyManager)BindingContext[dataGridView1.DataSource, null];

            if (OperationType.Edit == operationType)
            {
                DataRowView drv1 = (DataRowView)crm.Current;
                myCompany = (Int32)drv1["Rowid"];
            }

            frmCompany newform = new frmCompany(myCompany);

            if (newform.ShowDialog(this) == DialogResult.OK)
            {
                this.BindingContext[ds.Tables["company"]].EndCurrentEdit();
                ds.Clear();
                companyDA.Fill(ds, "company");
                myBindingSource.DataSource = ds.Tables["company"];
                dataGridView1.DataSource = myBindingSource.DataSource;
                dataGridView1.Refresh();
            }
        }

      private void btnClose_Click(object sender, EventArgs e)
        {
            m_dataRowView.EndEdit();
            compDA.Update(myDS, "company");
            myDS.AcceptChanges();
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

          
          // во  2 -ой  форме сделали изменения в таблице company (в форме свой dataset, 
          //изменения физически проходят )
           DeliveryList newform = new DeliveryList(myInvoice);
           if (newform.ShowDialog(this) == DialogResult.OK) 
            {
                // здесь нужно получить таблицу company с изменениями
                OleDbDataAdapter tempDA = new OleDbDataAdapter("select * from company",cn);
                tempDA.Fill(ds, "temp");

                // здесь выводим таблицу в грид - а в нем  новых изменений нет!!!
               dg.DataSource = ds.Tables["temp"];
            }

 uid  =  S a

 uid  =  S a

        private void btnClose_Click(object sender, EventArgs e)
        {
            if (dgSostav.SelectedRows.Count >  0 )
            {
                DialogResult dr = MessageBox.Show("Do you want to save selected deliveries ?", "Confirm selection", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dr == DialogResult.Yes)
                {
                        if (cn.State != ConnectionState.Open)
                            cn.Open();
                        OleDbDataAdapter dDA = new OleDbDataAdapter();
                        dDA.UpdateCommand = cn.CreateCommand();

                        int nomer;
                        foreach (DataGridViewRow row in dgSostav.SelectedRows)
                        {
                            nomer = Convert.ToInt32(row.Cells["rowid"].Value);
                            dDA.UpdateCommand.CommandText = "update [company] set [invoicerowid]=" + myInvoice +
                                                            " where [rowid]=" + nomer;
                            dDA.UpdateCommand.ExecuteNonQuery();
                        }
                        
                    this.DialogResult = DialogResult.OK;
                }
            }
            this.Close();
        }

 uid  =  S a

OleDbDataAdapter tempDA = new OleDbDataAdapter("select * from company",cn);
 ds.Clear();
tempDA.Fill(ds, "temp"); -- а разве вот здесь я не получу свежие данные?

 uid  =  S a

dDA.UpdateCommand.ExecuteNonQuery();