Class1 objektum = new Class1();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                fillDropdown();

                fillDropdown2();
            }
        }
        private void fillOsztaly()
        {
            string jarat = DropDownList1.SelectedItem.Value;
            string file = "~/jarat/" + jarat + ".txt";
            int i = 1;
            using (StreamReader sr = new StreamReader(Server.MapPath(file)))
            {
                string line;
                while ((line = sr.ReadLine()) != null)
                {
                    if (line.Contains("IRÁNY:"))
                    {
                        if (String.IsNullOrEmpty(objektum.Honnan))
                            objektum.Honnan = line.Substring(7).Trim();
                        else
                            objektum.Hova = line.Substring(7).Trim();
                        i = 1;
                    }
                    else
                    {
                        if (String.IsNullOrEmpty(objektum.Hova))
                            objektum.Indulas.Add(i++ + ". " +line.Trim());
                        else
                            objektum.Erkezes.Add(i++ + ". " +line.Trim());
                    }
                }

            }
        }

        protected void fillDropdown() {
            string[] fill = Directory.GetFiles(Server.MapPath("~/jarat/"),"*.txt");
            for (int x = 0; x < fill.Length; x++) {
                fill[x] = Path.GetFileNameWithoutExtension(fill[x]);
            }

            DropDownList1.DataSource = fill;
            DropDownList1.DataBind();
        }
        protected void fillDropdown2() {
            DropDownList2.Items.Clear();
            fillOsztaly();
            DropDownList2.Items.Add(objektum.Honnan);
            DropDownList2.Items.Add(objektum.Hova);
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            fillOsztaly();
            if (DropDownList2.SelectedIndex == 0)
            {
                GridView1.DataSource = objektum.Indulas;
            }
            else GridView1.DataSource = objektum.Erkezes;

            GridView1.DataBind();
        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            fillDropdown2();
        }