PIbd-32_Artamonova_T.V._COP_2/COP/UserCheckedListBox.cs

namespace COP
{
    public partial class UserCheckedListBox : UserControl
    {
        private event EventHandler? _selectedValueChanged;

        public UserCheckedListBox()
        {
            InitializeComponent();
        }

        public void FillList(List<string> items)
        {
            if (items.Count == 0 || items is null)
            {
                return;
            }
            checkedListBox.Items.Clear();
            checkedListBox.Items.AddRange(items.ToArray());
        }

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

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

        public event EventHandler SelectedValueChanged
        {
            add { _selectedValueChanged += value; }
            remove { _selectedValueChanged += value; }
        }

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