sql datareader problem

using (conn)
{
    conn.Open();
    SqlDataReader dr = cmd.ExecuteReader();
    if (dr.HasRows)
    {
        rptbio.DataSource = dr;
        rptbio.DataBind();
        dr.Read();
        int a = dr.GetInt32(1);
        dr.Dispose();
        var cmd1 = new SqlCommand("link", conn) { CommandType = CommandType.StoredProcedure };
        cmd1.Parameters.Add(new SqlParameter("@id", SqlDbType.Int)).Value = a;
        SqlDataReader dr1 = cmd1.ExecuteReader();
        rptlink.DataSource = dr1;
        rptlink.DataBind();
        dr1.Dispose();
        conn.Close();
    }
}