Default.aspx prvi zadatak

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.Xml;

namespace WebApplication3
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            prikaziXmlPodatke();
        }

        private void prikaziXmlPodatke()
        {

            string xmlfajl = HttpContext.Current.Server.MapPath("~/xmlfile1.xml");

            DataSet ds = new DataSet();
            ds.ReadXml(xmlfajl);

            //Sortiranje fala po citanosti knjige

            DataView dv = new DataView(ds.Tables[0]);
            dv.Sort = "MaxTemperatura DESC";

            if (ds.Tables[0].Rows.Count > 0)
            {
                GridView1.DataSource = dv;
                GridView1.DataBind();
            }
            else
            {
                Response.Write("Nema podataka za prikaz!");
            }
        }
    }
}