Pernyataan SQL Select khusus tidak menampilkan data di GridView

SELECT 
    LeagueTable.P,
    LeagueTable.W,
    LeagueTable.D,
    LeagueTable.L,
    LeagueTable.GF,
    LeagueTable.GA,
    LeagueTable.GD,
    LeagueTable.Pts,
    Team.Team_name,
    LeagueTable.Team_ID
FROM LeagueTable
INNER JOIN Team 
    ON LeagueTable.Team_ID = Team.Team_ID

Saya meminta pengguna memasukkan nama tim saat start up yang dimasukkan ke dalam tabel Team, yang dialihkan ke halaman web dengan tabel liga. Tabel liga awalnya tidak berisi data tetapi seharusnya menampilkan baris dengan masukan pengguna setelah pengguna membuka halaman ini.

Namun kueri ini menampilkan GridView sebagai kosong. Apakah ada yang salah?

asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" EmptyDataText="No teams entered into the table.">
        <Columns>
            <asp:BoundField DataField="P" HeaderText="P" SortExpression="P" />
            <asp:BoundField DataField="W" HeaderText="W" SortExpression="W" />
            <asp:BoundField DataField="D" HeaderText="D" SortExpression="D" />
            <asp:BoundField DataField="L" HeaderText="L" SortExpression="L" />
            <asp:BoundField DataField="GF" HeaderText="GF" SortExpression="GF" />
            <asp:BoundField DataField="GA" HeaderText="GA" SortExpression="GA" />
            <asp:BoundField DataField="GD" HeaderText="GD" SortExpression="GD" />
            <asp:BoundField DataField="Pts" HeaderText="Pts" SortExpression="Pts" />
            <asp:BoundField DataField="Team_name" HeaderText="Team_name" SortExpression="Team_name" />
            <asp:BoundField DataField="Team_ID" HeaderText="Team_ID" SortExpression="Team_ID" />
        </Columns>
    </asp:GridView>

            protected void NewTeamBtn_Click(object sender, EventArgs e)
{           
    string qry1 = "INSERT into Team (Team_name) VALUES (@Team_name)";
    using (SqlCommand cmd = new SqlCommand(qry1, con))
    {
        cmd.Parameters.Add(("@Team_name"), SqlDbType.VarChar).Value = NewTeamTxtBox.Text;
        cmd.CommandType = CommandType.Text;
        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
    }
    Response.Redirect("EnterData.aspx");
}
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SportsData2ConnectionString %>" SelectCommand="SELECT LeagueTable.League_ID, LeagueTable.Team_ID, LeagueTable.P, LeagueTable.W, LeagueTable.D, LeagueTable.L, LeagueTable.GF, LeagueTable.GA, LeagueTable.GD, LeagueTable.Pts, Team.Team_name FROM LeagueTable INNER JOIN Team ON LeagueTable.Team_ID = Team.Team_ID"></asp:SqlDataSource>