C＃ - 为什么我的自定义控件不可见

Question

我正在寻找一些关于为什么我的自定义/用户控件不可见的帮助。

我添加控件的代码：

ctlMapIcon mapIcon      = new ctlMapIcon();
mapIcon.Name            = "name";
mapIcon.LabelText       = "dummy map icon";
mapIcon.Parent          = picboxRegion1;
mapIcon.Width           = 130;
mapIcon.Height          = 70;
mapIcon.IconLocation    = new Point(100, 100);
this.tabRegion1.Controls.Add(mapIcon);

构建控件的代码： public partial class ctlMapIcon：UserControl     {         private bool isAlarm;

    private Image iconAlarm;
    private Image iconOk;
    private Image iconInactive;

    string lblTextIconName;

    public bool SetAlarm
    {
        set
        {
            isAlarm = value;
            if (isAlarm)
            {
                picboxIcon.Image = iconAlarm;
            }
            else
            {
                picboxIcon.Image = iconOk;
            }
        }
        get 
        { 
            return isAlarm; 
        }
    }

    public bool SetInactive
    {
        set
        {
            if (value)
            {
                picboxIcon.Image = iconInactive;
            }
            else
            {
                picboxIcon.Image = iconOk;
            }
        }

    }

    public string LabelText
    {
        set
        {
            brdLblIconName.Text = lblTextIconName;
        }
        get
        {
            return lblTextIconName;
        }
    }

    public ctlMapIcon()
    {
        InitializeComponent();

        //set all elements of the control to transparent
        SetStyle(ControlStyles.SupportsTransparentBackColor, true);
        this.BackColor              = Color.Transparent;
        picboxIcon.BackColor        = Color.Transparent;
        brdLblIconName.BackColor    = Color.Transparent;

        //set icon images
        iconAlarm       = Properties.Resources.mapicon_inalarm;
        iconOk          = Properties.Resources.mapicon_ok;
        iconInactive    = Properties.Resources.mapicon_ok;

        //set defaults
        picboxIcon.Image    = iconOk;
        picboxIcon.Width    = 40;
        picboxIcon.Height   = 40;
        brdLblIconName.Text = "site";
        this.Location       = new Point(5, 5);
        this.Height         = 70;
        this.Width          = 130;

    }

    public Point IconLocation
    {
        get { return this.Location; }
        set { this.Location = value; }
    }
}

任何帮助都将不胜感激，谢谢。