dataGridView + db access - реализовать вывод данных из бд в программу

public string ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Application.StartupPath+"\\Base.mdb;Persist Security Info=False";
 
        #region (LoadData) Функция загрузки данных в грид
        public void LoadData()
        {
 
            string QueryString = "Select * from PassTable order by Fam asc";
            using (OleDbDataAdapter dataAdapter = new OleDbDataAdapter(QueryString, ConnectionString))
            {
 
                DataTable table = new DataTable();
                table.Locale = System.Globalization.CultureInfo.InvariantCulture;
                dataAdapter.Fill(table);
                ((frmMain)Application.OpenForms["frmMain"]).bsMain.DataSource = table;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader);
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.DataSource = ((frmMain)Application.OpenForms["frmMain"]).bsMain;
                              
                ((frmMain)Application.OpenForms["frmMain"]).toolStripStatusLabel4.Text = table.Rows.Count.ToString();
 
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["id"].Visible = false;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Fam"].HeaderText = "Фамилия";
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Ima"].HeaderText = "Имя";
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Ot"].HeaderText = "Отчество";
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Nomer"].HeaderText = "Номер удостоверения";
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["DateVid"].HeaderText = "Дата выдачи";
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Otdel"].HeaderText = "Отдел";
 
 
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Fam"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Ima"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Ot"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Nomer"].AutoSizeMode = DataGridViewAutoSizeColumnMode.ColumnHeader;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["DateVid"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
                ((frmMain)Application.OpenForms["frmMain"]).dgMain.Columns["Otdel"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
 
            }
        }
#endregion