GridView Row visibility based on condition using C# in ASP.Net

 Hi,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Data;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.Configuration;
using System.Globalization;
using System.IO;
using System.Data.OleDb;
using System.Net;
using System.Net.Mail;
using System.Web.Services;

public partial class jobListing : System.Web.UI.Page
{
    DateTime now = DateTime.Now;

    SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ToString());
    
    protected void Page_Load(object sender, EventArgs e)
    {
        //string applicantID = Session["ap_id"].ToString();
        //lblMsg.Text = "Date today:" +now ;
        loadJobList(); 
    }

    // Display record from tbl_company
    protected void loadJobList()
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("SELECT j.j_id, j.j_position, j.j_location, j.j_category, j.j_datepublished, j.j_dateend, j.j_requirement, j.j_keyobjective, j.j_responsibilities, c.c_name, f.f_description FROM tbl_jobdescription j , tbl_company c , tbl_functionalarea f  WHERE j.c_id = c.c_id AND j.f_id = f.f_id", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        int count = ds.Tables[0].Rows.Count;
        con.Close();
        if (ds.Tables[0].Rows.Count > 0)
        {
            GridViewJL.DataSource = ds;
            GridViewJL.DataBind();
        }
        else
        {
            ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
            GridViewJL.DataSource = ds;
            GridViewJL.DataBind();
            int columncount = GridViewJL.Rows[0].Cells.Count;
            //lblmsg.Text = " No data found !!!";
        }
    }

    //Paging Function
    protected void PagingJL(object sender, GridViewPageEventArgs e)
    {
        GridViewJL.PageIndex = e.NewPageIndex;
        loadJobList();
    }
    
    //Job Posting Link
    protected void GridViewJL_OnRowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string position = ((Label)e.Row.FindControl("lblposting")).Text;
            string jid = ((Label)e.Row.FindControl("lbljobID")).Text;

            e.Row.Cells[2].Text = position;
            HyperLink h = new HyperLink();
            h.Text = e.Row.Cells[2].Text;

            h.NavigateUrl = "jobDescription.aspx?j_id=" + jid;
            e.Row.Cells[2].Controls.Add(h);
        }
    }
}

Where should I put the code below? :

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        DateTime publishedDate = Convert.ToDateTime(e.Row.Cells[4].Text);
        DateTime endDate = Convert.ToDateTime(e.Row.Cells[5].Text);
        if (endDate <= Convert.ToDateTime(DateTime.Now.ToShortDateString()))
        {
            e.Row.Visible = false;
        }
    }
}

I already tried but its not working