UserControl-将值设置为属性

Question

I'm trying to design my custom UserControl for WinForms applications. I used to create customized enum property that works perfect and creates one CheckBox when user change property value in design-time.

    private SearchOptionsEnum _searchAreas;
    //private List<bool> _searchAreas = new List<bool>();
    [Description(""), Category("GostcompSettings")]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [Editor(typeof(Utils.FlagEnumUIEditor), typeof(UITypeEditor))]
    public SearchOptionsEnum SearchAreas
    //public List<bool> SearchAreas
    {
        get
        {
            return _searchAreas;
        }
        set
        {

            _searchAreasChceckBoxList.Clear();
            pPanelWithCheckboxies.Controls.Clear();
            int x = 10;
            int y = 10;

            CheckBox _tempCheck = new CheckBox();
            _tempCheck.Checked = true;
            _tempCheck.Location = new Point(x, y);

            _searchAreasChceckBoxList.Add(_tempCheck);
            pPanelWithCheckboxies.Controls.Add(_tempCheck);

            MessageBox.Show("zmiana");
            _searchAreas = value;
        }
    }

I am using custom value editor UITypeEditor in the code and it works fine.

I get MessageBox in Design-Time and CheckBox appears. Problem is when I change SearchOptionsEnum to List<bool> and editor to default Boolean Collection Editor .

Then the CheckBox does not appear, and even debbuger breakpoint put in the set property does not stop there...

Where is the problem?

Moreover: When I edit bool values in editor it memorize it and keeps values. Even in next debugging session values set before are kept.

EDIT

public partial class StudySearchAndView : UserControl
{
    private List<CheckBox> _searchAreasChceckBoxList = new List<CheckBox>();

    private SearchOptionsEnum _searchAreas;
    //private List<bool> _searchAreas = new List<bool>();
    [Description(""), Category("GostcompSettings")]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [Editor(typeof(Utils.FlagEnumUIEditor), typeof(UITypeEditor))]
    public SearchOptionsEnum SearchAreas
    //public List<bool> SearchAreas
    {
        get
        {
            return _searchAreas;
        }
        set
        {

            _searchAreasChceckBoxList.Clear();
            pPanelWithCheckboxies.Controls.Clear();
            int x = 10;
            int y = 10;

            CheckBox _tempCheck = new CheckBox();
            _tempCheck.Checked = true;
            _tempCheck.Location = new Point(x, y);

            _searchAreasChceckBoxList.Add(_tempCheck);
            pPanelWithCheckboxies.Controls.Add(_tempCheck);

            MessageBox.Show("zmiana");
            _searchAreas = value;
        }
    }

}

pPanelWithCheckboxies is just a panel dropped on UserControl.

Answer 1

Controls appear only if Parent is set. You should set the Parent of _tempCheck to this.

        CheckBox _tempCheck = new CheckBox();
        _tempCheck.Parent = this;
        _tempCheck.Checked = true;
        _tempCheck.Location = new Point(x, y);