using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ComboBox
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            List<MobilePhone> mobilePhones = new List<MobilePhone>();
            mobilePhones.Add(new MobilePhone("Nokia", "3310", false, false));
            mobilePhones.Add(new MobilePhone("Samsung", "9100", false, true));
            mobilePhones.Add(new MobilePhone("Fly", "1000", false, true));
            mobilePhones.Add(new MobilePhone("Sony", "Xperia", true, true));
            mobilePhones.Add(new MobilePhone("HTC", "OneX", true, false));

            comboBox1.DataSource = mobilePhones;
            comboBox1.DisplayMember = "Brand";

            listBox1.DataSource = mobilePhones;
            listBox1.DisplayMember = "Brand";
            listBox1.SelectionMode = SelectionMode.MultiExtended;


        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            MobilePhone mobilePhone = (MobilePhone)comboBox1.SelectedItem;
            label1.Text = mobilePhone.Model;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string message = "";
            bool isFirstPass = true;
            //foreach (MobilePhone mobilePhone in listBox1.SelectedItems)
            //{
            //    if (isFirstPass)
            //        message += mobilePhone.Model;
            //    else
            //        message += " , " + mobilePhone.Model;
            //    isFirstPass = false;
            //}
            for (int i = 0; i < listBox1.SelectedItems.Count; i++)
            {
                MobilePhone mobilePhone = (MobilePhone)listBox1.SelectedItems[i];
                if (i == 0)
                    message += mobilePhone.Model;
                else
                    message += " , " + mobilePhone.Model;
            }
            MessageBox.Show(message);
        }
    }
    public class MobilePhone
    {
        public string Brand { get; set; }
        public bool Camera { get; set; }
        public bool TouchPad { get; set; }
        public string Model { get; set; }
        public MobilePhone(string brand, string model, bool camera, bool touchPad)
        {
            Brand = brand;
            Camera = camera;
            TouchPad = touchPad;
            Model = model;
        }
    }
}