COP-17/WinFormsProject/WinFormsLibrary/CustomCheckedListBox.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.Windows.Forms.VisualStyles.VisualStyleElement;

namespace WinFormsLibrary
{

    public partial class CustomCheckedListBox : UserControl
    {
        public CustomCheckedListBox()
        {
            InitializeComponent();
        }

        public void Clear()
        {
            checkedListBox.Items.Clear();
        }

        public CheckedListBox.ObjectCollection Items
        {
            get
            {
                return checkedListBox.Items;
            }
        }

        public string Selected
        {
            get
            {        
                if (checkedListBox.SelectedItem != null)
                {
                    return checkedListBox.SelectedItem.ToString();
                }
                else
                {
                    return "";
                }
            }
            set
            {
                for (int i = 0; i < checkedListBox.Items.Count; ++i)
                {
                    if (checkedListBox.Items[i].ToString() == value)
                    {
                        checkedListBox.SetItemChecked(i, true);                        
                    }
                }
            }
        }

        private EventHandler onValueChanged;
        public event EventHandler ValueChanged
        {
            add
            {
                onValueChanged += value;
            }
            remove
            {
                onValueChanged -= value;
            }
        }

        private void checkedListBox_SelectedValueChanged(object sender, EventArgs e)
        {
            onValueChanged?.Invoke(sender, e);
        }
    }
}