protected void Button1_Click(object sender, EventArgs e)
        {
            int ddl = DropDownList1.SelectedIndex;
            ddl = ddl +1;
            string q = "SELECT [FK_tratta] FROM [percorso] WHERE ([FK_paese] ="+ddl+")";
            //List<partenza> p = new List<partenza>();
            //List<int> id = new List<int>();
            OleDbConnection oconnect = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\pippo\Documents\nuovo_db.accdb;Persist Security Info=False;");
            OleDbCommand command = new OleDbCommand(q, oconnect);
            oconnect.Open();
            OleDbDataReader esegui = command.ExecuteReader();

            esegui.Close();
            
        }
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