using Android.OS;
using Android.App;
using Android.Graphics;
using Android.Widget;
using System;

namespace p1
{
    [ActivityAttribute(Label = "p1", MainLauncher = true)]

    public class Class1 : Activity
    {
        EditText dag, maand, jaar;
        TextView tekst2, oud;
        Button knop;
        int day, month, year;
        string dagen;

        protected override void OnCreate(Bundle b)
        {
            base.OnCreate(b);
            LinearLayout layout;
            layout = new LinearLayout(this);
            layout.Orientation = Orientation.Vertical;

            TextView tekst1;
            tekst1 = new TextView(this);
            tekst1.Text = "schrijf hier uw geboortedatum op in de vorm dd/mm/jjjj";

            tekst2 = new TextView(this);
            oud = new TextView(this);
            knop = new Button(this);
            knop.Text = "klik hier";
            knop.Click += klik;

            dag = new EditText(this);
            dag.TextChanged += invoer1;

            maand = new EditText(this);
            maand.TextChanged += invoer1;

            jaar = new EditText(this);
            jaar.TextChanged += invoer1;

            layout.AddView(tekst1);
            layout.AddView(dag);
            layout.AddView(maand);
            layout.AddView(jaar);
            layout.AddView(knop);
            layout.AddView(tekst2);
            layout.AddView(oud);
            this.SetContentView(layout);
        }

        private void klik(object sender, EventArgs e)
        {
            DateTime birthday = new DateTime(year, month, day);
            TimeSpan days = DateTime.Now - birthday;
            dagen = days.ToString();
            oud.Text = "U bent " + dagen + "dagen oud.";
        }

        public void invoer1(object o, Android.Text.TextChangedEventArgs e)
        {
            Console.WriteLine(dag.Text);
            string dag1 = dag.Text;
            string maand1 = maand.Text;
            string jaar1 = jaar.Text;

            day = int.Parse(dag1);
            month = int.Parse(maand1);
            year = int.Parse(jaar1);

            tekst2.Text = "U bent geboren op: " + day + "-" + month + "-" + year;
        }
    }
}