protected void Button1_Click(object sender, EventArgs e)
        {
            String str = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("/App_Data/mailing_list.mdb");
            OleDbConnection cn = new OleDbConnection(str);
            cn.Open();
            string nome = this.TextBox1.Text;
            string mail = this.TextBox2.Text;
            string stato = "";
            
            if (this.RadioButtonList1.SelectedValue.Equals("Iscriviti"))
            {
                stato = "si";
                try
                {
                    string sql = "INSERT INTO lista ([nome],[email],[attivo],[data_inserimento]) VALUES (" + nome + "," + mail + ",si," + System.DateTime.Now + ")";
                    OleDbCommand cmd = new OleDbCommand(sql, cn);
                    this.query.Text = str;
                    cmd.ExecuteNonQuery();
                    this.verifica_ml.Text = "Email inserita";
                }
                catch (Exception ex)
                {
                    this.verifica_ml.Text = "Errore: " + ex.ToString();
                }

                
            }
            if (this.RadioButtonList1.SelectedIndex.Equals("Cancellati"))
            {
                
            }
            cn.Close();
        }