两种原始数据库读取方法

private void sdr()
  {
      SqlConnection conn = new SqlConnection("data source=(local);database=yiqi;uid=monkey;pwd=donkey");
      conn.Open();
      SqlCommand comm = new SqlCommand("select * from t1", conn);
      DataTable dt = new DataTable();
      SqlDataReader sdr = comm.ExecuteReader();
      dt.Load(sdr);
      GridView1.DataSource = dt;
      GridView1.DataBind();
      conn.Close();
      sdr.Dispose();
  }

  private void sda()
  {
      SqlConnection conn = new SqlConnection("data source=(local);database=yiqi;uid=monkey;pwd=donkey");
      conn.Open();
      SqlCommand comm = new SqlCommand("select * from t1", conn);
      SqlDataAdapter sda = new SqlDataAdapter(comm);
      DataSet ds = new DataSet();
      sda.Fill(ds, "t1");
      GridView1.DataSource = ds.Tables[0].DefaultView;
      GridView1.DataBind();
      conn.Close();
      sda.Dispose();
  }