protected void Page_Load(object sender, EventArgs e)
        {
            string searchS = Request.QueryString["search"];

            if (Request.QueryString["id"] != null)
            {
                try
                {
                    if (acc.checkCommentByUser(int.Parse(Request.QueryString["id"].ToString())) == true)
                    {
                        acc.deleteCommentByUser(int.Parse(Request.QueryString["id"].ToString()));
                    }
                    acc.deleteUser(int.Parse(Request.QueryString["id"].ToString()));
                    Response.Write("<script LANGUAGE='JavaScript'>alert('Xoá thành công !')</script>");
                    Response.Redirect("Manage.aspx");
                }
                catch (Exception)
                {
                    Response.Write("<script>alert('Xoá thất bại !')</script>");
                }
            }
            else if (searchS != null && searchS != "")
            {
                Repeater1.DataSource = acc.searchUsers(searchS);
                Repeater1.DataBind();
            }
            else
            {
                Repeater1.DataSource = acc.getUsers();
                Repeater1.DataBind();
            }
        }