Delete and display record from database in ASP.Net GridView using C#

I am trying to delete row from database automatically if "last date of apply  date " is equal to "current date ".

I tried but it is not binding my gridview with select query. I want to bind my gridview after delete query.

    public partial class Applied_job : System.Web.UI.Page
    {
        SqlConnection mycon = new SqlConnection(ConfigurationManager.ConnectionStrings["Q_SS_regnConnectionString1"].ToString());
        SqlCommand cmd = new SqlCommand();
        protected void Page_Load(object sender, EventArgs e)
        {

            checkExpired();
            FillGrid();
        }
        void checkExpired()
        {
            if (!IsPostBack)
            {
                string constr = ConfigurationManager.ConnectionStrings["Q_SS_regnConnectionString1"].ConnectionString;
                SqlConnection con = new SqlConnection(constr);
                SqlCommand cmd = new SqlCommand("delete from JS_Resume where email='" + Session["mail"].ToString() + "' and Last_Apply_date=CURRENT_TIMESTAMP and Status='Rejected'", con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataTable dt = new DataTable();
                da.Fill(dt);
                GridView2.DataSource = dt;
                GridView2.DataBind();
            }
        }
        void FillGrid()
        {
            if (!IsPostBack)
            {
                string constr = ConfigurationManager.ConnectionStrings["Q_SS_regnConnectionString1"].ConnectionString;
                SqlConnection con = new SqlConnection(constr);
                SqlCommand cmd = new SqlCommand("select * from JS_Resume where email='" + Session["mail"].ToString() + "'", con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataTable dt = new DataTable();
                da.Fill(dt);
                GridView2.DataSource = dt;
                GridView2.DataBind();
            }
        }

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    </br>
    </br>
    <div style="margin-left: 25%">
        <div class="row" style="width:260%">
            <div class="col-sm-4">
                <div class="shadow-lg p-3 mb-5 bg-white rounded panel panel-blue">
                    <div class="panel-heading" style="font-size: x-large; font-weight: bolder">
                        <center><b>Applied Jobs</b></center>
                    </div>
                    <div class="panel-body">
                        <center>
                        <asp:GridView ID="GridView2" runat="server" CssClass="mydatagrid" PagerStyle-CssClass="pager"
                            HeaderStyle-CssClass="header" EmptyDataText="No Records Found" RowStyle-CssClass="rows" AutoGenerateColumns="False"  OnSelectedIndexChanged="GridView2_SelectedIndexChanged">
                            <Columns>
                                <asp:BoundField DataField="Id" HeaderText="User ID" SortExpression="Id" ReadOnly="True" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" InsertVisible="False" Visible="false" />
                                <asp:BoundField DataField="email" HeaderText="Email" SortExpression="email" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="resumefile" HeaderText="Resume File" SortExpression="resumefile" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" Visible="false" />
                                <asp:BoundField DataField="HireAnswer" HeaderText="Hire Answer" SortExpression="HireAnswer" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="Skills" HeaderText="Skills" SortExpression="Skills" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="JobPost" HeaderText="Job Post" SortExpression="JobPost" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="CompanyName" HeaderText="Company Name" SortExpression="CompanyName" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="CompanyEmail" HeaderText="Company Email" SortExpression="CompanyEmail" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="city" HeaderText="Company City" SortExpression="city" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="Last_Apply_date" HeaderText="Last Date of Apply" SortExpression="Last_Apply_date" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                                <asp:BoundField DataField="JobId" HeaderText="Job Id" SortExpression="JobId" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" Visible="false" />
                                <asp:TemplateField HeaderText="Resume">
                                    <ItemTemplate>
                                        <asp:LinkButton ID="lnkDownload" Text="Download" CommandArgument='<%# Eval("Id") %>' runat="server" OnClick="lnkDownload_Click" CssClass="btn btn-success" ></asp:LinkButton>
                                    </ItemTemplate>
                                </asp:TemplateField>                               
                            </Columns>
                        </asp:GridView>
                       </center>
                    </div>
                </div>
            </div>
        </div>
    </div>
</asp:Content>