SqlDataAdapter adp = new SqlDataAdapter("SELECT * FROM tablo", conn);

        DataSet ds = new DataSet("tablo");

        adp.Fill(ds, "tablo");

        int count;

        count = Convert.ToInt32(ds.Tables[0].Rows.Count.ToString());

        if ((count == 0))

        {

            Response.Write("Kayıt Yok");

        }

        else

        {

            Response.Write((ds.Tables[0].Rows[0]["Alan"].ToString()));

        }