Show and Hide panel with nested gridview inside C# Repeater item

Code Behind

protected void bindRepeater()
{
      rptDays.DataSource = ResultsWrapper.Dates;
      rptDays.DataBind();
}

 protected void rptDays_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        DateTime date = Convert.ToDateTime(e.Item.DataItem);
        LinkButton btnDateHeader = e.Item.FindControl("btnDateHeader") as LinkButton;
        btnDateHeader.Text = date.ToShortDateString();
        int status = Convert.ToInt32(rblReviewType.SelectedValue);
        Label lblDayResultStats = e.Item.FindControl("lblDayResultStats") as Label;

        if (status == 0)
        {
            GridView gridSOs = e.Item.FindControl("gridSOs") as GridView;
            List<SOResult> subset = ResultsWrapper.Results.FindAll(delegate(SOResult result)
            { return result.Date.ToShortDateString() == date.ToShortDateString(); });

            if (subset != null && subset.Count > 0)
            {
                gridSOs.DataSource = subset;
                gridSOs.DataBind();
             }
            else
            {
                lblDayResultStats.Text = "No Results Found";
            }

        }
        else if (status == 1)
        {
            GridView gridDispositions = e.Item.FindControl("gridDispositions") as GridView;
            List<Disposition> subset = ResultsWrapper.Dispositions.FindAll(delegate(Disposition d)
            { return d.CommentTime.ToShortDateString() == date.ToShortDateString(); });

            if (subset != null && subset.Count > 0)
            {
                gridDispositions.DataSource = subset;
                gridDispositions.DataBind();
            }
            else
            {
                lblDayResultStats.Text = "No Results Found";
            }
        }

        if (ResultsWrapper.Dates.Count == 1)
        {
            Panel p = e.Item.FindControl("pnlDisplayGrid") as Panel;
            p.Visible = true;
        }
    }

protected void rptDays_OnItemCommand(Object sender, RepeaterCommandEventArgs e)
    {
        if (e.CommandName == "ShowGrid")
        {
            int index = Convert.ToInt32(e.CommandArgument);
            Panel p = (Panel)rptDays.Controls[index].FindControl("pnlDisplayGrid");
            if (p.Visible)
                p.Visible = false;
            else
                p.Visible = true;
        }
    }

html

<asp:Repeater ID="rptDays" runat="server" OnItemDataBound="rptDays_ItemDataBound"
                                    OnItemCommand="rptDays_OnItemCommand">
                                    <ItemTemplate>
                                        <table style="width: 100%; text-align: center; font-weight: bold;">
                                            <tr>
                                                <td style="text-align: left;">
                                                    <asp:LinkButton ID="btnDateHeader" runat="server" CommandName="ShowGrid" CommandArgument='<%# Container.ItemIndex %>' /><br />
                                                    <asp:Label ID="lblDayResultStats" runat="server" SkinID="lblDetail" /><hr />
                                                </td>
                                            </tr>
                                            <tr>
                                                <td style="text-align: center;">
                                                    <asp:Panel ID="pnlDisplayGrid" runat="server" Visible="false">
                                                        <asp:GridView ID="gridSOs" runat="server" OnRowDataBound="gridSOs_RowDataBound" DataKeyNames="ScoresID,Portal"
                                                            OnRowUpdating="gridSOs_RowUpdating">
                                                            <Columns>
                                                                <asp:BoundField DataField="Date" HeaderText="Time" />
                                                                <asp:BoundField DataField="Portal" HeaderText="Division" />
                                                                <asp:TemplateField HeaderText="Interaction" ItemStyle-Font-Size="Small">
                                                                    <ItemTemplate>
                                                                        <asp:LinkButton ID="btnInter" runat="server" CommandName="Update" Text='<%# Eval("InteractionID") %>' />
                                                                    </ItemTemplate>
                                                                </asp:TemplateField>
                                                                <asp:BoundField DataField="FormID" HeaderText="Form" />
                                                                <asp:BoundField DataField="Evaluated" HeaderText="Title" />
                                                                <asp:BoundField DataField="StatusName" HeaderText="Status" />
                                                                <asp:BoundField DataField="FormatedScore" HeaderText="Score" />
                                                            </Columns>
                                                        </asp:GridView>
                                                        <asp:GridView ID="gridDispositions" runat="server" OnRowDataBound="gridDispositions_RowDataBound"
                                                            DataKeyNames="InteractionID,Ntlogin,QANtlogin" OnRowUpdating="gridDispositions_RowUpdating">
                                                            <Columns>
                                                                <asp:BoundField DataField="" HeaderText="Time" />
                                                                <asp:BoundField DataField="" HeaderText="Portal" />
                                                                <asp:TemplateField HeaderText="Interaction" ItemStyle-Font-Size="Small">
                                                                    <ItemTemplate>
                                                                        <asp:LinkButton ID="btnInter" runat="server" CommandName="Update" Text='<%# Eval("InteractionID") %>' />
                                                                    </ItemTemplate>
                                                                </asp:TemplateField>
                                                                <asp:BoundField DataField="" HeaderText="Evaluator" />
                                                                <asp:BoundField DataField="" HeaderText="Title" />
                                                                <asp:BoundField DataField="" HeaderText="Disposition" />
                                                                <asp:BoundField DataField="" HeaderText="Duration" />
                                                            </Columns>
                                                        </asp:GridView>
                                                        <asp:Repeater ID="rptDispositions" runat="server">
                                                            <ItemTemplate>
                                                                <table>
                                                                    <tr>
                                                                        <td>
                                                                            <asp:Label ID="lblDispositionName" runat="server" Text='<%# Eval("CommentID") %>'></asp:Label></td>
                                                                    </tr>
                                                                </table>
                                                            </ItemTemplate>
                                                        </asp:Repeater>
                                                        <hr />
                                                    </asp:Panel>
                                                </td>
                                            </tr>
                                        </table>
                                    </ItemTemplate>
                                </asp:Repeater>