PIbd-31_Afanasev.S.S._COP_5/Component/ComponentProgramming/ControlListBox.cs

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;
using static System.Runtime.InteropServices.JavaScript.JSType;

namespace ComponentProgramming
{
    public partial class ControlListBox : UserControl
    {
        private event EventHandler? _listBoxChanged;

        public string SelectedItem
        {
            get
            {
                if (listBoxElements.SelectedItem == null)
                {
                    return "";
                }
                return listBoxElements.SelectedItem.ToString()!;
            }
            set
            {
                listBoxElements.SelectedItem = value;
            }
        }

        public event EventHandler ListBoxChanged
        {
            add { _listBoxChanged += value; }
            remove { _listBoxChanged -= value; }
        }

        public ControlListBox()
        {
            InitializeComponent();
        }

        public ListBox.ObjectCollection ListBoxItems
        {
            get { return listBoxElements.Items; }
        }

        public void ClearListBox()
        {
            listBoxElements.Items.Clear();
        }

        public void FillListBox(List<string> items)
        {
            listBoxElements.Items.Clear();
            foreach (var item in items)
            {
                listBoxElements.Items.Add(item);
            }
        }

        private void listBoxElements_SelectedIndexChanged(object sender, EventArgs e)
        {
            _listBoxChanged?.Invoke(this, e);
        }
    }
}