How to add footer ?

In ListView Component, I did the Items Template and the header template as well, but can't find anyway to add the footer , is there anyway I can do that ?

and Is it posiible to have something like Data Source Manager that will query Back-End API gradually say every 5 minutes to check for new data ?

And how to access the items of EsjViewList , All I can find is AddItem() and RemoveItem() but no access like EsjViewList.Items[] ? , say I want to clear the Items .

Also, I am trying to add items in ListView, but it never update on screen, my approach is to add the DataSource list :

      EjsListView ID="listview"  ShowHeader="true" @ref="dodo2" TValue="Notification" DataSource="@DataList"

@code {
    public EjsListView dodo2 { get; set; }
    public List DataList { get; set; } = new List{
        new Notification{Text="Test Test", SecondText="2nd Line Test", URL="http://www.google.com",Icon="fas fa-bell fa-fw", IconBackgroundColor="red" },
       new Notification{Text="Hello World!", SecondText="2nd Line Test hello worlds", URL="http://www.cnet.com",Icon ="fab fa-android", IconBackgroundColor="yellow" },

};

 protected override Task OnAfterRenderAsync(bool firstRender)
    {

        if (firstRender)
        {
            System.Timers.Timer t = new System.Timers.Timer();
            t.Elapsed += async (s, e) =>
            {
                try
                {
                    DataList.Add(new Notification { Text = "Test Test", SecondText = "2nd Line Test", URL = "http://www.lilo.com", Icon = "fas fa-bell fa-fw", IconBackgroundColor = "red" });
                    //    dodo2.AddItem(new Notification { Text = new Random(0).Next(30).ToString(), SecondText = "2nd Line Test", URL = "http://www.lilo.com", Icon = "fas fa-bell fa-fw", IconBackgroundColor = "red" }, null) ;
                    //   await InvokeAsync(dodo2.Refresh);
            //      dodo2.DataSource = DataList;

                  await   dodo2.DataBind(true);
                    await InvokeAsync(StateHasChanged);
                }
                catch (Exception eee)
                {

                }
            };
            t.Interval = 5000;
            t.Start();
        }
        return base.OnAfterRenderAsync(firstRender);
    }