Обновление DataGridView после операции

using System.Data.OleDb;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        
        public Form1()
        {
            InitializeComponent();
        }
               
        OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\base.mdb");
        OleDbCommand com = new OleDbCommand();
        OleDbDataAdapter adap = new OleDbDataAdapter();
        DataTable dt = new DataTable();
 
        public void Form1_Load(object sender, EventArgs e)
        {
 
            DataSet ds = new DataSet();
            com.Connection = conn;
            com.CommandText = "Select * from base";
            conn.Open();
            adap.SelectCommand = com;
            adap.Fill(ds);
            dt = ds.Tables[0];
            dataGridView1.DataSource = dt;
            conn.Close();
 
         }

using System.Data.OleDb;
namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            using (var connection = new OleDbConnection("Provider=" + "Microsoft.Jet.OLEDB.4.0;Data Source=C:\\base.mdb"))
            {
                connection.Open();
                using (OleDbCommand command = connection.CreateCommand())
                {
                    command.CommandText = "INSERT INTO base (name,address) values ('" + textBox1.Text + "','" + textBox2.Text + "');";
                    int numberOfUpdatedItems = command.ExecuteNonQuery();
                }
                connection.Close();
 
                this.Close();
            }
        }
    }
}

dataGridView1.Refresh();

            DataSet ds = new DataSet();
            com.Connection = conn;
            com.CommandText = "Select * from base";
            conn.Open();
            adap.SelectCommand = com;
            adap.Fill(ds);
            dt = ds.Tables[0];
            dataGridView1.DataSource = dt;
            conn.Close();

OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\base.mdb");
        OleDbCommand com = new OleDbCommand();
        OleDbDataAdapter adap = new OleDbDataAdapter();
        DataTable dt = new DataTable();
            DataSet ds = new DataSet();
            com.Connection = conn;
            com.CommandText = "Select * from base";
            conn.Open();
            adap.SelectCommand = com;
            adap.Fill(ds);
            dt = ds.Tables[0];
            dataGridView1.DataSource = dt;
            conn.Close();

OleDbCommand insertcommand = new OleDbCommand("INSERT INTO base(name, address) values(@name1, @address1)", connection);
      insertcommand.Parameters.AddWithValue("@name1", textBox1.Text);
      insertcommand.Parameters.AddWithValue("@address1", textBox2.Text);
      try
      {
        insertcommand.ExecuteNonQuery();
      }
      catch (OleDbException ex)
      {
        MessageBox.Show(ex.Message);
      }

 DialogResult dr = new DialogResult();
            Form2 frm2 = new Form2();
            dr = frm2.ShowDialog();
            if (dr == DialogResult.OK)
            {
                this.base_load();
            }

  DataSet ds = new DataSet();
            com.Connection = conn;
            com.CommandText = "Select * from base ORDER BY id DESC";
            conn.Open();
            adap.SelectCommand = com;
            adap.Fill(ds);
            dt = ds.Tables[0];
            dataGridView1.DataSource = dt;
            conn.Close();

adap.Update(set, "qwe");

dr = frmaddorg.ShowDialog();
            if (dr == DialogResult.OK)
            {
                this.gSDBOrganizationsTableAdapter.Fill(this.organizations.GSDBOrganizations);
            }

            adapter.UpdateCommand = command.GetUpdateCommand();
            adapter.InsertCommand = command.GetInsertCommand();
            adapter.DeleteCommand = command.GetDeleteCommand();

dataGridView1.DataSource = null;
dataGridView1.DataSource = dt;

conn.Open();

conn.Close();

                DataSet dataset = new DataSet();
               SqlCommand sLcom; //и т.д.
                using (SqlDataAdapter dataAdapter = new SqlDataAdapter(adap))
                {
                    dataAdapter.Fill(dataset);
                }

this.suppliesTableAdapter.Fill(this.homeConnect.supplies);