dataReader doesn't read

Question

Hi :) I am trying to read some information from the database, but i don't know why this reader doesn't work. I've checked in the database and i have the client with that id.

                int nr_dauna = 0;

            string selectDauna = "SELECT * FROM dauna WHERE id_client='" + 16 + "'";

            SqlCommand executaSelectDauna = new SqlCommand(selectDauna, conn);

            SqlDataReader rdr_dauna = executaSelectDauna.ExecuteReader();

            rdr_dauna.Read();

            nr_dauna = Convert.ToInt32(rdr_dauna["nr_dauna"]);

            rdr_dauna.Close();

            MessageBox.Show(nr_dauna.ToString());

It's sth wrong? Or maybe there is another way of reading database info?Thanks!