datagirdview delete records, data update problem, hope you give a solution.

 oleConnection1.Open();
            string sql = "select * from txt ";
            OleDbDataAdapter thisAdapter = new OleDbDataAdapter(sql, oleConnection1); 
            DataSet thisDataSet = new System.Data.DataSet(); 
            thisAdapter.Fill(thisDataSet, "table");   
            DataTable dt = thisDataSet.Tables["table"];  
            dataGridView1.DataSource = dt;

  string sql = "delete from txt where id" + "="+dgv.Rows[e.RowIndex].Cells[0].Value.ToString().Trim()+"";
                    OleDbCommand cmd = new OleDbCommand(sql, oleConnection1);
                    cmd.ExecuteNonQuery();        
                     updata();//这个updata 数据更新，方法代码不会。        
                    MessageBox.Show("删除成功");

updata method code does not, please do me a favor.

updata()
{
请各位大侠帮忙写下 ，数据更新的代码。
}

What method, after deletion, directly reflected. There is no need to exit the window and re-enter.
Please reply positively, thank you very much, please have the detailed code.