How to refresh Datagridview content after perticular duration

Thanks a lot for your help .. coz of that I made it possible :)

Hi,Check whether timer works or not by adding MessageBox in timer_tick event or debug it[breakpoints & pressing F11 in fillusers() method].

and before call fillusers() method.simply clear the contents of datagridview.then call that function.it will add updated data.Make sure your data updated within 3 seconds.

Hi,
    Thanks for quick answer. I tried it..it's calling the timer_tick event after the given duration..but it's nt refreshing the data :(

here is my code...

 private void FillUsers()
        {
           LinqChatDataContext _dataContext =new   LinqChatDataContext();
           var _users = from _u in _dataContext.LoggedInUsers
                        select _u;  
            bindingUser.DataSource= _users;
            grid_users.DataSource= bindingUser;          
            //grid_users.Refresh();
        }

        private void timer_refresh_Tick(object sender, EventArgs e)
        {
            FillUsers();
        }