Update changes of datagridview to SQL (large database)

try
          {
              SqlConnection con = new SqlConnection(constr);
              con.Open();

              SqlDataAdapter adapter = new SqlDataAdapter();
              adapter.SelectCommand = new SqlCommand("SELECT * FROM trips", con);
              SqlCommandBuilder builder = new SqlCommandBuilder(adapter);
              adapter.Fill(dt);
              adapter.Update(dt);

              MessageBox.Show("Changes Saved", "Updating...", MessageBoxButtons.OK, MessageBoxIcon.Information);
              con.Close();
          }
          catch (Exception ex)
          {
              MessageBox.Show(ex.ToString());
          }
          finally { lblCount.Text = "Total Records Displayed: " + dgvTrips.Rows.Count.ToString(); }